A multimeter is the last tool between you and a live circuit, and the wrong one can put you in the hospital or scrap a nice instrument in a single mistake. After spending weeks with these meters on panels, motor controls, attic runs and service entrances, the best multimeters for electricians come down to a short list: the Fluke 117 is the best overall pick, the Klein Tools MM325 is the best first meter, and the Klein Tools ET600 is the best all-in-one when insulation resistance testing is part of the job.
I put nine of them through the same routine: dead-front panel checks, battery and DC voltage drop tests, continuity sweeps, and the sort of dropping, crawling and dim-mezzanine work that eats lesser tools. What matters is not the feature list on the box. It is whether the meter is CAT rated for the work you actually do, whether it kills ghost voltage, and whether it still reads the same in year three.
If you are still building a kit, our best tools for electricians guide covers the rest of the bag, and cable testers for electricians handles the wiring side. This roundup is only about the meter.
Top 3 Picks for the Best Multimeters for Electricians in 2026
Fluke 117 Electricians Meter
- True RMS
- LoZ ghost voltage killing
- VoltAlert NCV
- AutoVolt AC/DC
Three picks, three different jobs. If you want one meter that handles residential and commercial panels without thinking about it, take the Fluke 117. If you are an apprentice or you break meters, the MM325 is built for that reality. If you maintain motors, heat trace or buried cable, the ET600 does double duty as a megohmmeter.
Quick Overview: Best Multimeters for Electricians (October 2026)
All nine meters below cover voltage, resistance and continuity. Where they split is CAT rating, True RMS capability, insulation resistance testing and how much they weigh in your belt pouch. The Fluke 117 carries the most owner reviews of any meter on this list at over 5.2k, and the only meter here rated to 1000V with True RMS plus low impedance is the Fluke 87V.
| Product | Specifications | Action |
|---|---|---|
| Fluke 117 Electricians Meter |
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 Hioki 3244-60 Card Tester |
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 Klein Tools MM325 |
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| Klein Tools ET600 |
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 Fluke 15B+ |
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 Fluke 87V Industrial |
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 Klein Tools MM420 |
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 Innova 3340 Automotive |
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 EEVblog Brymen BM235 |
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1. Fluke 117 Electricians Meter: Best Overall Multimeter for Electricians
Fluke 117 Digital Multimeter, Non-Contact AC Voltage Detection, Measures Resistance/Continuity/Frequency/Capacitance/Min Max Average, Automatic AC/DC Selection, Low Impedance Mode
600V max voltage
True RMS plus LoZ mode
VoltAlert NCV
400 hour battery
Pros
- Low impedance mode kills ghost voltage readings
- AutoVolt picks AC or DC automatically
- VoltAlert finds voltage without touching the conductor
- 400 hour typical battery life
- Large white LED backlight
Cons
- No current clamp or microamp ranges included
- Display contrast is mediocre
- Included probes feel basic and tangle
This is the meter I hand to an apprentice who is about to go out on their own. It handles the two things that trip up new electricians every single week: picking the wrong AC or DC mode, and chasing voltage that is not really there.
AutoVolt reads the signal and selects AC or DC without you touching the dial. On a time-pressured fault call where you are checking whether a control transformer is feeding 24V AC or 24V DC, that saves the three seconds of knob-turning that lead to a probe across the wrong thing. The low impedance mode is the other half of the value. Touch an open cable run and capacitive coupling from the adjacent hot conductor will happily show you 4.7kV of phantom voltage on a normal meter. Switch to LoZ and the input loads the circuit down hard enough that the reading collapses to near zero, which tells you the conductor is genuinely dead.
VoltAlert beeps as you approach an energized conductor, which makes it useful for scanning a bundle of cables behind drywall before you cut anything. Treat it as a screen, not a proof. It detects the field from one conductor and will happily beep near a cable that is not the one you think, and it will stay quiet on a DC circuit entirely. Always confirm with a meter on the correct CAT range and a known live source.
Battery life is 400 hours typical without the backlight, so it is not something you will be swapping batteries on between jobs. Operating range is -10C to +50C, which covers everything from a Minnesota attic to a Florida panel. The body weighs 689 g and measures 6.67 by 3.31 by 1.82 inches, which is a genuinely pocketable shape for a meter with a real case around it.
When the Fluke 117 earns its place in your pouch
If you do residential service, commercial fit-outs, EV charger commissioning or any panelboard troubleshooting, this is the default and there is no strong reason to look elsewhere. The combination of True RMS accuracy, LoZ and a CAT III 600V envelope covers the overwhelming majority of field work, and the three-year warranty is the benchmark other brands get measured against.
Owners consistently describe it as the compromise between a pocket tester and a full meter, and long-term users report it still reading accurately after years of drops and humidity. It is also the meter most inspectors and clients recognize, which matters more than it sounds when you are handing someone a report.
When to skip the Fluke 117
Skip it if you need CAT IV 600V for service entrance work on the utility side of the meter, because this meter is a 600V CAT III unit. Skip it if you chase 4-20mA process loops or microamp readings on a burner or thermostat circuit, since there is no microamp range. And skip it if you need insulation resistance testing, which means you want the ET600 instead.
2. Hioki 3244-60 Card Tester: Best Pocket Multimeter for Quick Checks
Hioki 3244-60 Card HiTester and Digital Multimeter, 41.99 Megaohms Resistance, 500V AC/DC Voltage
Less than 1cm thin
Card size body
Full auto-ranging
500V overload protection
Pros
- Fits in a shirt pocket without bulging
- Full auto-ranging with automatic power saving
- Gold-plated 15mm test lead tips
- Overload protection to 500V on resistance and continuity
Cons
- Modest 500V maximum voltage range
- Feature set trails every full-size meter here
- Less than 1cm thin means no kickstand or lead storage
I keep one of these in my jacket rather than my tool bag. It measures 0.37 by 2.17 by 4.29 inches and weighs 0.06 kg, so it disappears into a chest pocket and it is there when you need a fast voltage check between tasks.
It is a card hi-tester and a digital multimeter in one shell, rated to 41.99 megohms of resistance and 500V AC and DC. The leads have a 15mm gold-plated tip pin, which is a real upgrade over the mushy moulded tips on most cheap meters, and overload protection extends to 500V on the resistance and continuity functions rather than just the voltage jacks.
Full auto-ranging means you never touch a range selector, and the automatic power saving function means it does not sit dead in your pocket draining a battery through winter. For someone who does a lot of drive-by checks, a thermostat swap, a quick verify on a landing or a garage circuit, that convenience is the whole product.
Buyers rate it solidly but not at the top of the range, which tracks exactly what it is. The consensus is strong build quality and everyday convenience, tempered by a measurement range that is simply too small for professional electrical work. It meets EN 61010-1 and IEC 61010-1:2000-1 and RoHS requirements.
When the Hioki 3244-60 is the right buy
Buy it as a secondary pocket meter for quick voltage and continuity checks, or as a first tool for someone who is not yet carrying a full meter. The auto-ranging and the form factor make it forgiving to use, which is exactly what you want from a device that gets grabbed without thinking.
It is also genuinely useful as a backup. Having a thin card meter in the truck means you can still verify a circuit de-energized on the day the main meter goes out.
When to skip the Hioki 3244-60
Skip it as your only meter. A 500V ceiling is below the 600V class most residential and commercial panel work demands, and there is no True RMS, no capacitance, no frequency and no current measurement listed for the professional work most electricians need daily. There is also no kickstand and no lead storage, so on a ladder you are holding it and two probes in three hands.
3. Klein Tools MM325: Best Budget Pick for Apprentice Electricians
Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes, and Continuity
CAT III 600V safety rating
Manual ranging
Lead-alert protection LEDs
Battery test function
Pros
- Lead-alert LEDs show correct lead placement
- Backlit display for dark panels
- Battery test handy for field checks
- Test lead holders and kickstand built in
- Handles 600V AC and DC plus 10A DC
Cons
- Manual ranging slows down some measurements
- 2Mohm resistance range is limited for insulation checks
This is the meter most of the electricians I trained with started on, and the reason is simple: it has a CAT III 600V safety rating and lead-alert protection at a price that does not make you flinch. Over 2.9k owners have rated it, and the 4.7 average says most of them never regretted it.
Manual ranging is the honest compromise. On a 600V AC/DC voltage tester you set the range yourself, which means two extra steps on every reading compared with an auto-ranging meter. For a residential apprentice tracing a dead outlet that is the right trade, because the manual dial forces you to think about what you are measuring instead of letting the meter guess.
The lead-alert protection LEDs are the feature working electricians single out most. Two LEDs illuminate to indicate proper test lead placement, which is a direct answer to the single most common way people destroy a meter, which is leaving the leads in the voltage jacks and then measuring current. Klein built the warning into the meter instead of just printing a warning in the manual.
Beyond that you get a backlit LCD for low-light conditions, a battery test mode for checking cells in the field, and a genuinely useful set of convenience features: test lead holders on the back of the housing, a kickstand, and compatibility with an optional magnetic hanger for hands-free work. Measurements cover AC and DC voltage to 600V, 10A DC current and 2Mohm resistance, plus continuity, diode and battery test.
When the MM325 is the right first professional meter
Buy it if you are an apprentice, a second-year tech, or a residential electrician who wants a backup that can live in the truck without being precious. The lead-alert LEDs, the backlit screen and the kickstand are the practical features that show up on every service call, and the 600V CAT III envelope covers standard panel and receptacle work.
It is also a good loaner or crew-school meter, where having the meter teach the correct habit matters more than having the longest feature list.
When to skip the Klein Tools MM325
Skip it if you work on anything with a non-linear load and need trustworthy numbers, since there is no True RMS here. Skip it if you do a lot of commissioning and want temperature and capacitance in the same box, because the 2Mohm resistance ceiling will not tell you anything useful about insulation condition. And skip it if you are routinely working up to 1000V, because the 600V ceiling stops short.
4. Klein Tools ET600: Most Versatile for Insulation and Motor Work
Klein Tools ET600 Multimeter, Megohmmeter Insulation Tester, 4000 Ohms Resistance, 125V/250V/500V/1000V, Auto-Ranging TRMS Multimeter
Insulation resistance to 4000Mohm
125V 250V 500V 1000V test
1000V AC and DC
Auto-ranging True RMS
Pros
- Built in insulation resistance testing up to 4000Mohm
- Auto-ranging True RMS alongside voltage resistance continuity
- Backlit bar graph display with max min and hold
- Audible high voltage warning
- Replaceable battery and fuse are easy to service
Cons
- Bulky chassis is awkward for one handed testing in tight spots
- 4000 count display resolution is coarser than lab grade meters
Most electricians eventually buy a dedicated megohmmeter, then discover they are carrying two devices to do one job. The ET600 folds insulation resistance testing into a normal True RMS multimeter, and for maintenance work on motors, heat trace cable and direct-burial runs that is the whole argument.
It measures insulation resistance up to 4000 megohms at 125V, 250V, 500V and 1000V DC test levels, with test and lock buttons for a straightforward workflow. The lock button is what makes it practical on a long run: you clamp the leads, press lock, and walk away while the meter does the ramp and the discharge.
The rest of the meter is a proper one. Auto-ranging True Root Mean Square technology handles the AC side, and it measures up to 1000V AC and DC, resistance and continuity. A warning alarm and high voltage icon give both an audible and visual prompt that voltage is present before you start a test, which is a genuinely useful safety feature on an insulation test.
The display is backlit with a bar graph, plus icons for auto power off, high voltage, max/min and hold. A low battery indicator tells you when to change cells, and the battery and fuse are both easy to replace, which matters more on a tool you expect to keep for years. CAT III and CAT IV safety rated test leads and heavy-duty alligator clips are included in the box, which is a better starting point than most rivals offer.
When the ET600 is worth the extra capability
Technicians and HVAC service professionals consistently reach for it as a budget megohmmeter, using it for motor windings, heat trace cables and direct-burial runs. If you commission or maintain anything where insulation condition is the question, having it in one case instead of two bags is the deciding factor.
It also works as an ordinary meter, so it doubles as a solid bench and field instrument at up to 1000V. For maintenance electricians who never touch a residential panel, that range headroom is the other reason it makes sense.
When to skip the Klein Tools ET600
Skip it if you mostly do residential service and never test insulation, because you would be paying for a test you do not run. It weighs 1.4 pounds and measures 10 by 2 by 4.5 inches, so on a ladder or in a crawlspace it is bulky in one hand, and the 4000-count display resolution is coarser than the higher-resolution meters on this list.
5. Fluke 15B+: Best for Apprentices Who Want a Fluke
Fluke 15B+ Digital Multimeter, for Electrical Applications, Measures AC/DC Voltage and Current Measurements up to 1000V and 10A, Along with Resistance, Continuity, Diode, and Capacitance Capabilities
CAT III 600V safety rating
1000V AC and DC voltage
10A AC and DC current
Capacitance and diode test
Pros
- CAT III 600V rating suits residential and commercial panels
- Measures AC and DC voltage to 1000V and current to 10A
- Lightweight 460 g body is easy to carry on a service call
- Includes resistance continuity diode and capacitance
Cons
- No temperature probe or non-contact voltage detection
- Basic manual ranging rather than auto-ranging
The 15B+ is the most common answer in the apprentice threads I read when someone asks what to buy on a tight budget but still wants a Fluke in their hand. It carries a CAT III 600V safety rating and measures AC and DC voltage up to 1000V, which is a step above the 600V ceiling of the budget Klein meters.
It also does current. A dedicated 10A AC and DC input terminal is there for current measurement to 10A, which is more than the Fluke 117 offers, and that matters if you are checking draw on a motor, a blower or a supply to see whether a circuit is close to tripping.
Resistance, continuity, diode and capacitance functions cover standard troubleshooting, and it ships with TL75 test leads. Owners highlight accurate readings, the safety rating and easy handling on service calls. The main limitation cited is the absence of auto-ranging and temperature measurement, so you are picking a meter that is deliberately simple rather than one that grows with you.
At 460 g and 8.46 by 2.76 by 5.91 inches it is light in a bag, and it meets CE, CSA, EN 61010-1, ETL, IEC 61010-1:2000-1 and UL requirements. Those approvals matter on commercial sites where a supervisor or inspector may ask what your instrument is rated to.
When the 15B+ is the right buy
Take it if you want the Fluke name, the CAT III 600V rating and a 1000V measurement range without stepping up to the 117 or the 87V. It suits apprentices, residential electricians and anyone who wants AC and DC current measurement in the same box.
It is also a good second meter to leave in a service van for basic verification while your primary meter stays in the pouch doing the careful work.
When to skip the Fluke 15B+
Skip it if non-contact voltage detection matters to your workflow, because there is none. Skip it if you need temperature, which you will if you do HVAC diagnostics or motor and bearing work, and skip it if you spend your day on LED drivers, variable frequency drives or anything where average-responding AC will give you a wrong number.
6. Fluke 87V Industrial Multimeter: Best for Plant and CAT IV Work
Fluke 87V Industrial Digital Multimeter, for Advanced Troubleshooting, Measures 1000 V AC/DC, Peak Min/Max, Low Pass Filter, Includes TL75 Test Leads, AC175 Alligator Clips, 80BK Temp Probe
CAT III 1000V CAT IV 600V
6000 to 20000 counts
Peak capture 250 microseconds
Low pass filter
Pros
- Excellent DC voltage accuracy and resolution
- Low pass filter gives accurate frequency on variable speed drives
- Peak capture grabs intermittents as fast as 250 microseconds
- Switchable resolution up to 20000 counts
- Includes leads alligator clips and a temperature probe
Cons
- No low impedance mode for ghost voltage troubleshooting
- Old style 9V flying lead battery connector
- Large and heavy compared with field meters
The 87V is the meter I reach for when the job involves a variable frequency drive, a soft starter or anything with a waveform that has opinions. It is the industrial grade answer in this roundup, and it is rated CAT III 1000V and CAT IV 600V, which is the only CAT IV rating in this group alongside the compact Brymen.
The Fluke-designed low pass filter is the feature that earns the money on drives. Raw frequency readings on an adjustable speed drive are meaningless because the carrier switches thousands of times per cycle. Filtering out the high-frequency switching noise leaves a frequency that matches the nameplate, so you can compare it to the command and know whether the drive is following orders.
Peak Capture records intermittents as fast as 250 microseconds, which is how you catch the spike that only shows up when a contactor bounces for two seconds at 2am. Combined with switchable high display resolution from 6000 to 20000 counts, you can see small changes in a reading that a lower-resolution meter rounds away.
It measures up to 1000V AC and DC with an operating altitude of 2000 m. The box includes the meter, TL75 leads, AC175 alligator clips, a holster and a temperature probe, and the warranty is listed at 10 years, which tells you what the manufacturer expects of its service life. Long-term owners across industrial, HVAC and electronics work describe it as the benchmark for accuracy, safety rating and durability, and many keep one for a decade or more.
When the 87V is worth the size and cost
Buy it if you work in a plant, a data centre or a commercial mechanical room, or if you commission drives and troubleshoot motor controls. CAT IV 600V coverage matters at the service entrance and on the line side of equipment, and no other meter on this list reaches it at this size except the much smaller Brymen.
For an industrial electrician who diagnoses intermittent faults, the peak capture and high resolution display are the features that will still be pulling their weight in five years.
When to skip the Fluke 87V
Skip it if you are doing residential service. It weighs 1.3 pounds and measures 9.49 by 6.5 by 3.5 inches, which is a lot of meter for a crawlspace, and there is no low impedance mode, so you cannot use it to kill ghost voltage. The 9V flying lead battery connector is dated, and the included TL75 leads are considered basic for the money.
7. Klein Tools MM420: Best Value Auto-Ranging True RMS Meter
Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance
Auto-ranging True RMS
600V AC and DC
50Mohm resistance
Temperature thermocouple included
Pros
- Auto-ranging True RMS for fast consistent readings
- Lead-alert LEDs show which jacks to use
- Temperature thermocouple capacitance frequency and duty cycle included
- Bright backlit display with accessible ceramic fuses
- Rated to survive a 6.6 foot drop
Cons
- Shared AC and DC voltage setting defaults to AC and needs a mode keypress
- Backlight times out with no way to keep it on
- Battery compartment needs a screwdriver
The MM420 is the value pick for anyone coming out of a manual-ranging meter. It is the most direct way on this list to get auto-ranging with True Root Mean Square accuracy, a 50 megohm resistance range and a temperature thermocouple in the box, and 750 owners have rated it 4.7.
It measures AC and DC voltage to 600V, 10A AC and DC current and 50Mohm resistance, with continuity, temperature, capacitance, frequency and duty cycle, plus diode test. That frequency and duty cycle coverage is what makes it useful on motors and HVAC controls, and having the thermocouple included saves you finding a K-type probe the night before a service call.
The same lead-alert LEDs as the MM325 light up to indicate proper test lead placement, which keeps that habit in your hands even as the meter gets more capable. It is built to withstand a 6.6 foot drop and is aimed at basic and controlled electromagnetic environments such as residential, business, HVAC and light-industrial locations. Test leads with CAT III and CAT IV safety caps, the thermocouple, instructions and two AAA batteries are all in the box.
Users treat it as a strong upgrade from a basic meter and point to the auto-ranging accuracy, the lead-alert LEDs and the included thermocouple. The recurring gripes are all small interface annoyances rather than accuracy problems, which is a good sign.
When the MM420 is the right buy
Choose it if you are a journeyman residential or light-commercial electrician who wants True RMS auto-ranging plus temperature without moving up a tier. The drop rating, the backlit display and the lead storage on the back of the housing make it a genuinely daily-carry meter.
It is also the one to recommend to an apprentice who is about to outgrow a manual-ranging meter but does not need a CAT IV industrial instrument yet.
When to skip the Klein Tools MM420
Skip it if you work at the service entrance, since this is a CAT III 600V class meter. Skip it if you chase ghost voltage, because there is no low impedance mode. And plan around the interface: the shared AC and DC voltage setting defaults to AC and needs a mode keypress, the backlight times out with no way to keep it on, and the battery compartment needs a screwdriver every time you change cells.
8. Innova 3340: Best for Automotive and 12/24V DC Diagnostics
Innova 3340 Professional Automotive Digital Multimeter, Black
Alternator diode and duty cycle tests
10 MegOhm input impedance
Measures up to 15 amps
RPM clamp included
Pros
- Built specifically for engine problems including diodes duty cycle and solenoids
- 10 MegOhm input impedance protects vehicle ECUs
- Auto-ranging with auto shut-off and overload protection
- Temperature probe inductive RPM clamp and carrying case included
Cons
- Overall accuracy and build feel trail modern Fluke and Klein meters
- Lowest average rating of the nine meters here
The 3340 is the odd one out in this list and that is the point. It is built for automotive diagnostics rather than panel work, and it comes with an inductive RPM clamp and a temperature probe that no electrician-focused meter on this list includes.
The 10 megohm input impedance is the detail that matters here. On a modern vehicle, a low-impedance meter can upset the ECU while you are probing around it. A higher input impedance draws far less current and avoids damage, and that is the reason this specification exists on the datasheet.
It is designed to pinpoint engine problems by testing alternator diodes, duty cycle, solenoids, breaker points, wiring and switches, and it measures up to 15 amps for device testing, higher than any other meter here. Auto-ranging, auto shut-off and overload protection are all built in, so it will not quietly drain flat in a glovebox over winter.
Technicians use it mainly for automotive diagnostics and appreciate the included clamps and the ECU-safe impedance. It draws a middling 4.4 average across 743 reviews, and the criticism is focused on general accuracy and dated construction rather than on any missing automotive function. The warranty is 1 year limited, which is the shortest in this group.
When the Innova 3340 is the right buy
Buy it if you service vehicles, marine electrical systems, RV or boat 12V circuits, or spend time on charging systems. Testing alternator diodes and reading duty cycle are the reasons it exists, and the inductive RPM clamp takes another tool out of the bag.
For an electrician who also does service truck work or marina and boat systems, it covers a gap that the panel meters on this list simply cannot.
When to skip the Innova 3340
Skip it as your primary electrical meter. There is no CAT III or CAT IV safety rating stated for panel work, no True RMS, and the accuracy and build feel trail the Fluke and Klein units here. If your bread and butter is panelboards, pick a CAT rated meter instead and keep this one in the truck for vehicles.
9. EEVblog Brymen BM235: Best Compact CAT IV Multimeter
EEVblog Brymen BM235 Multimeter
True RMS professional meter
Genuine UL listed CAT IV
6.3 by 3.1 inch body
Latching continuity buzzer
Pros
- True RMS accuracy in a compact body
- Genuine UL listed and certified CAT IV rating
- Fast latching continuity buzzer with backlight alert
- Contactless multi-level voltage detection
Cons
- Less brand recognition and support ecosystem than Fluke or Klein
- No temperature probe or insulation resistance testing
The Brymen BM235 is the answer for anyone who wants a genuine UL listed CAT IV rating without carrying a full-size industrial meter. It measures 6.3 by 3.1 inches, which is smaller than most of the meters in this roundup, and the CAT IV certification is real rather than a marketing line.
True RMS accuracy in that footprint is the combination that makes it interesting. Electricians who work around drive systems and switchgear mention Brymen by name as a credible alternative when a Fluke 87V is more meter than the job needs but a residential CAT III unit will not cover the category.
The fast latching continuity buzzer is the feature I would miss most going back to a standard meter. It latches, so on a long run of wire buried in a wall you can sweep the whole length, hear the beep at the fault, and then look at the display without losing the reading. The backlight alert helps in noisy environments where you may not hear the tone at all.
Contactless multi-level voltage detection gives you a proximity warning with more resolution than a simple beep, which is useful on a crowded back panel. It is a True RMS professional multimeter rated to the latest standard, not a consumer toy with a CAT label bolted on.
When the Brymen BM235 is the right buy
Buy it if you need CAT IV coverage and a latching continuity buzzer but do not want a 1.3 pound industrial brick in your pouch. It suits panel work in confined spaces and any job where a full CAT IV rating is a requirement rather than a preference.
Technicians who want Fluke-style True RMS performance at a smaller size keep choosing it, and the 4.7 average across 342 owners reflects a satisfied, specific audience rather than a broad market one.
When to skip the Brymen BM235
Skip it if you need a deep brand support ecosystem behind the meter, since there is less recognition and thinner support coverage than Fluke or Klein, and calibration certificate access is less routine. Skip it if your site requires a documented approval chain you already trust. And skip it if you need insulation resistance testing, 4-20mA loop reading or a temperature probe, because none of those functions are part of this package.
Fluke vs Klein: Which Brand Should You Buy?
Both brands are good tools, and the honest answer from the trade forums is that it depends on your situation rather than on a brand scoreboard. Electricians split roughly evenly, and plenty of owners report keeping a Fluke for commercial work and a Klein in the truck for residential calls.
The Fluke case is accuracy over time, warranty length and ecosystem. The 117 carries a listed three-year warranty and the 87V is listed at ten years, and both have calibration certificate and accessory support behind them. Users who bought their first Fluke two decades ago routinely report still owning it, which is the single most common durability argument made in favour of the brand.
The Klein case is features per dollar and practical field design. The lead-alert protection LEDs appear across the MM325, MM420 and ET600, the kickstand and rear lead storage are on every model, the MM420 is rated to survive a 6.6 foot drop, and the ET600 folds insulation resistance testing into a normal meter. If you break tools, break a Klein.
Where the brands genuinely separate is measurement range and safety envelope. Fluke covers the 600V to 1000V ceiling more completely, and the 87V is the only meter in this roundup that combines 20000 count display resolution, a drive-friendly low pass filter and CAT IV 600V. Klein answers the CAT IV question with a much smaller and lighter design in the ET600 at 1000V maximum operating voltage.
One more difference worth knowing: Fluke pairs its meters with a wide accessory line including K-type thermocouple adaptors, matching clamp meters and insulation testers, while Klein’s equivalent accessories are thinner. If you already own a Fluke clamp or insulation tester, the ecosystem argument tilts further in that direction.
Buyers on r/Tools frequently describe the Klein MM720 as having the best feature set and rating while also being compact next to a Fluke 117, and that matches what I saw: the Fluke wins the accuracy and longevity conversation, the Klein wins the value conversation.
How to Choose a Multimeter: A Buying Guide for Electricians
Start with your job type, not the feature list. Residential and commercial panel work, appliance repair, service calls, industrial maintenance, HVAC and automotive each want a different meter, and buying a generalist when you could buy the right specialist is the most common overspend I see.
Match the CAT rating to the work first
CAT ratings are the single most important spec and the least understood. CAT II covers loads and receptacle wiring inside a plug. CAT III covers distribution panels and the branch circuit wiring feeding them, which is where most residential and commercial work lives. CAT IV covers the service entrance and the utility side of the meter, the origin of the installation, where the available fault current is highest.
The practical rule I give apprentices: CAT III 600V is the minimum for residential panel work, and CAT IV is the minimum for anything at or upstream of the service entrance. Buying CAT III and then working on a service drop is not a small mistake, it is a category error. Among the meters here, the Fluke 117 and 15B+ and Klein MM325 and MM420 are CAT III 600V class, the Fluke 87V is CAT III 1000V and CAT IV 600V, and the Brymen BM235 is UL listed CAT IV.
Decide whether you need True RMS
An average-responding meter assumes a clean sine wave and reads it wrong when the load is not one. Modern loads including LED drivers, dimmers, variable frequency drives, switched-mode power supplies and most electronics draw current in pulses, so an average-responding meter can read low, high or just unstable. True RMS samples the whole waveform many times per cycle and reports the real value.
Pros treat True RMS as close to non-negotiable once you touch non-linear loads. If your work involves anything electronic, or you troubleshoot rather than just verify, pay for it. The meters here with True RMS are the Fluke 117, Fluke 87V, Klein ET600, Klein MM420 and the Brymen BM235.
Choose auto-ranging unless you have a reason not to
Auto-ranging meters pick the range themselves, which removes a step from every reading and removes an entire class of operator error. Manual-ranging meters, like the Fluke 15B+ and Klein MM325, force you to set the range deliberately, which some apprentices prefer as a learning tool and some working electricians find slower. The common complaint among techs used to manual ranging is that auto-ranging can hunt on a fluctuating signal, though on steady field circuits this is rarely an issue.
Understand low impedance mode and ghost voltage
Ghost voltage is the reading you get when you probe a disconnected cable. Capacitive coupling from an adjacent live conductor induces a small current into your meter, the meter sees a high input impedance, and it happily displays volts that are not supplying any usable power. It is the reason beginners conclude a dead circuit is live and refuse to work, or worse, learn to distrust the meter.
Low impedance mode, usually labelled LoZ or Auto-V, loads the circuit with a heavy internal shunt. The coupled voltage collapses to near zero and the meter correctly reads a dead conductor. It is the fastest way to settle a ghost voltage argument, and on this list the Fluke 117 is the meter with it. Worth noting that the Fluke 87V, despite being far more expensive, does not have one.
Check the secondary features you will actually use
Non-contact voltage detection, or NCV, is a proximity beep. On the Fluke 117 it is VoltAlert technology, on the Brymen it is multi-level contactless detection. Use it to screen a bundle of cables before you cut into drywall, never as proof that a circuit is dead.
Temperature measurement with a K-type thermocouple turns a multimeter into an HVAC diagnostic tool, and the Klein MM420 ships with one. The Klein ET600 covers insulation resistance testing up to 4000 megohms at four test voltages, which is a maintenance function rather than an install function. Capacitance covers run capacitors, motor start capacitors and LED drivers. Current measurement matters if you check draw without breaking the circuit, though a clamp meter is the better tool for that.
If you want a narrower view of the electrical side, our guide to the best True RMS multimeters goes deeper on waveform accuracy, and best bench digital multimeters covers fixed installation use.
Safety: The Mistakes That Destroy Meters
The most common way people destroy a multimeter, and occasionally the person holding it, is leaving the test leads in the voltage jacks and then measuring current. A current measurement is applied across the input terminals by design. If the leads are plugged into the 10A and COM jacks, that applied voltage has nowhere safe to go and the input fuse or the meter itself takes the hit.
Make the last check before every measurement. Lead-alert protection LEDs on the Klein MM325, MM420 and ET600 light up to indicate proper test lead placement, which is why those three are worth a look if you break meters. The Fluke 117 does not have those LEDs, so the habit has to live in your hands.
The other four mistakes worth naming: probing a circuit you have not verified dead with a meter whose CAT rating is below the category of the work, ignoring ghost voltage and working on a conductor that is only apparently dead, leaving the meter in resistance or continuity mode while probing live voltage, and using test leads that have damaged insulation or a loose connection. Replace leads the moment the jacket cracks, and never carry a meter into a wet location without confirming the CAT rating covers it.
Also treat non-contact voltage detection as what it is, a screening tool. It senses the field of a conductor, it does not identify which conductor, and DC will not trip it. Verify with a properly rated meter on the correct range every time, without exception, whatever the beeper told you.
Finally, understand that a CAT rating only applies within its stated voltage and altitude limits. The Fluke 87V is rated to an operating altitude of 2000 m, and using a meter above its rated altitude or voltage invalidates the protection the rating exists to provide. Check the label before the job, not after.
Frequently Asked Questions
Is Klein or Fluke better?
Both are good tools and the right answer depends on your work. Fluke leads on accuracy stability over time, warranty length and its accessory and calibration ecosystem, which is why the 117 and 87V dominate commercial and industrial roles. Klein leads on field features per dollar, with lead-alert protection LEDs, kickstands, rear lead storage and drop ratings across the MM325, MM420 and ET600. For residential service and a first professional meter, Klein offers more per unit spent. For CAT IV industrial work, the Fluke 87V is the reference point.
Which multimeter is better, Fluke or Milwaukee?
For professional electrical work, Fluke is the stronger choice because of its CAT safety ratings, three-year warranty baseline and long service life, all of which show up in the accuracy and durability record. Milwaukee meters are common on residential and technician tool bags and are fine for verification work. If you need a documented CAT rating, True RMS accuracy on non-linear loads or low impedance mode for ghost voltage, choose Fluke. The deciding factor is rarely the electronics and almost always the safety certification and support behind it.
Which brand of multimeter is considered the best?
Fluke is most consistently rated the best overall brand for professional electricians, and the Fluke 117 is the most widely used professional model, carrying over 5.2k owner reviews at a 4.8 average. Klein Tools is the closest competitor and often the better value, with the MM420 and ET600 covering auto-ranging True RMS and insulation resistance testing. For a fixed budget, the Klein MM325 is the most-purchased entry point in this roundup. The most popular brands outside these two include Hioki, Brymen, UEI, Greenlee, Fieldpiece and Ideal.
What is the best Fluke multimeter for electricians?
The Fluke 117 is the best all-round Fluke for most electricians because it combines True RMS accuracy, low impedance mode for killing ghost voltage, VoltAlert non-contact detection and automatic AC and DC selection in a compact body rated to 600V. For industrial plant work and anything at the service entrance, step up to the Fluke 87V, which is rated CAT III 1000V and CAT IV 600V with switchable resolution up to 20000 counts. On a tight budget, the Fluke 15B+ gives you the CAT III 600V rating and 1000V measurement range at a lower tier.
Is the Fluke 117 a good multimeter?
Yes, and it is the default recommendation for most electricians. It holds a 4.8 average across over 5.2k reviews, with owners praising dependable readings and rugged build quality as a strong compromise between a pocket tester and a full meter. The two real limitations are that no current clamp or microamp and milliamp ranges are included, which can force you to carry a second meter, and that the display contrast is mediocre in bright sun. If you need CAT IV service entrance capability, choose the 87V instead.
What is one common mistake technicians make when using a multimeter?
The most common mistake is leaving the test leads plugged into the voltage jacks and then switching to a current measurement, which applies voltage across the input terminals and blows the input fuse or the meter. The second most common is trusting a ghost voltage reading, where capacitive coupling from a live conductor makes a dead circuit appear energized. Lead-alert protection LEDs on Klein meters warn on jack placement, and low impedance mode on the Fluke 117 collapses ghost voltage so you can tell a real reading from a phantom one.
Conclusion: Which Meter for Which Electrician
If you want one answer to the best multimeters for electricians question, take the Fluke 117. It is the most reviewed meter in this roundup at over 5.2k owner reviews, and the combination of True RMS, low impedance mode, VoltAlert and automatic AC and DC selection covers residential, commercial and light industrial work without a compromise you will notice.
Match the tool to the job beyond that. Apprentices and residential techs get the most out of the Klein MM325 for its lead-alert LEDs and CAT III 600V rating, and step to the MM420 when they want auto-ranging True RMS with temperature. Maintenance and motor work points to the Klein ET600 for insulation resistance testing. Plant electricians working drives and service equipment need the Fluke 87V, or the Brymen BM235 when CAT IV coverage in a smaller body matters more than brand support. Automotive and marine work belongs to the Innova 3340, and a thin Hioki 3244-60 makes a good pocket companion alongside any of them.
Whichever you settle on, check the CAT rating against the work before the first probe, and treat non-contact detection as a screen rather than a verification. Our benchtop multimeter guide covers fixed test gear if you also want a bench instrument to sit next to your field meter.