Best AC DC True RMS Clamp Meter
Best AC DC True RMS Clamp Meter
As an Amazon Associate, this site earns from qualifying purchases. Sourcing note: Every product detail in this guide comes from the Amazon product listings and seller descriptions for each model. None of these specifications have been checked against a physical meter, so confirm current ranges, safety ratings, and included parts on the product page before you buy. This guide does not replace the safety instructions in each meter’s manual.
A clamp meter measures current without breaking the circuit: you open the jaw, close it around a single conductor, and read the number. Some meters in this set measure current only through the clamp, some measure current and voltage, and some are handheld multimeters with no clamp at all.
Of the eleven products, eight are clamp meters. Only four of those list both AC and DC current and True RMS support in the same listing, so the sections below sort the set by that test.
What the terms mean in practice
AC and DC current. Alternating current (AC) changes direction in a repeating pattern, the way most household power does. Direct current (DC) flows in one direction, the way a battery does. A meter that measures both lets you check a battery drain on a vehicle as well as a wall circuit. A meter that measures AC only will not tell you anything about DC current, so check which one you need before you buy.
True RMS. A True RMS meter calculates the heating value of a waveform, which matters when the waveform is not a clean sine wave, such as the output of a variable-speed motor drive. Listings that say True RMS mean the meter is designed for that kind of reading. Listings that do not mention it do not confirm it, so treat them as unconfirmed rather than as lacking the feature.
Counts. The count rating describes the resolution of the display. A 6000-count meter shows more digits of precision than a 2000-count meter. A higher count is not the same as a more accurate reading, since accuracy also depends on the specified tolerance for each range.
Jaw size. The jaw opening limits the conductor you can clamp. Several listings give a jaw of about 28 to 30 millimeters, which is around one inch. Confirm that a cable you need to measure will fit before you order.
Safety ratings. Listings give Category (CAT) ratings, such as CAT II or CAT III at 600 volts, and pollution degree. A CAT rating tells you the environment the meter is designed for. Use a meter only within its listed rating, and read the manual before you measure anything live.
Safety basics that apply to every meter in this set
These points come from the listings and apply whatever meter you buy.
- Clamp one conductor at a time. Several listings say to clamp around a single live wire, not the whole power cable. Clamping around a whole cable can read the net current, which may be zero, and give a misleading reading.
- Use the test leads for voltage, not the jaws. The DMC-100 voltage measurement must be done with the test leads, and the clamp jaws are for current only.
- Remove the protective cap before using test leads. The MAYILON listing notes this, and it is easy to miss the first time you use a meter.
- Check the battery and the fuse before use. Listings describe low-battery indicators and fuse protection. A low battery can cause unreliable readings.
- Work within the rated category. Check the CAT rating on the meter and do not measure circuits above it.
These are general rules from the listings, not a full safety procedure. Read the manual for the meter you buy, and if you are not sure how to measure a circuit safely, get help from a qualified person before you start.
Product-by-product breakdown
1. AstroAI AM33D Digital Multimeter (2000 counts)
This is a compact handheld multimeter rather than a clamp meter, so it does not clamp around a conductor. The listing gives a 2000-count display, DC voltage ranges up to 600 volts, AC voltage ranges up to 600 volts, and DC current ranges up to 10 amps. It also measures resistance, continuity, and diodes. The listing gives CAT II 600 volt and CAT III 300 volt ratings, along with fuse protection on the current inputs.
Several details are Not confirmed. The battery is described as two 1.5-volt AAA cells in the power field, but the included components list a 9-volt battery, so the battery type is Not confirmed. The sample rate is 3 times per second in one field and 2 times per second in the feature text, so the sample rate is Not confirmed. The product dimensions field reads 42.52 inches tall, which does not match the weight or the handheld design, so the dimensions are Not confirmed. The listing gives a three-year warranty and notes that the meter cannot test all AC current or AC voltage below 100 millivolts.
Who it suits: a buyer who needs a basic handheld meter for voltage, resistance, and continuity, and who does not need a clamp. Who should skip it: anyone who wants to measure current without disconnecting a wire, since this model has no clamp jaw.
2. Temirup CM87C True-RMS Inrush Clamp Meter (6000 counts, 600 A)
This is a True RMS clamp meter that covers AC and DC current up to 600 amps and AC and DC voltage up to 600 volts. The display is 6000 counts, with a maximum displayed value of 5999. The listing adds an inrush function, which records the maximum current at the moment a motor starts, and two input modes: a variable frequency drive filter mode, called VFD, and a low input impedance mode, called LoZ. The listing also includes non-contact voltage detection, temperature measurement with a probe, capacitance, frequency, continuity, and diode checks.
The inrush function has a note in the feature text that reads “Only Measures AC,” so check the full note on the product page before you rely on the inrush reading for a DC circuit. The jaw is 30 millimeters, and the meter weighs about 240 grams without batteries. It takes two AAA batteries, and it includes a temperature probe and two test pens. The listing gives an overload warning that turns the backlight red and sounds a buzzer when voltage exceeds 600 volts. A zero key clears the reading when you measure DC current. Auto-shutoff is set to about 15 minutes.
Who it suits: a buyer who wants True RMS with AC and DC current, a start-up reading for motors, and a temperature probe in one meter. Who should skip it: anyone who needs the inrush reading on a DC circuit, since the feature note limits it to AC.
3. ANENG SZ301 Digital Multimeter with Case (2000 count)
ANENG Digital Multimeter with Case,DC AC Voltmeter,Ohm Volt Amp Meter
This is a handheld multimeter, not a clamp meter. The listing gives a 2000-count display, DC voltage up to 600 volts with plus or minus 1 percent plus 5 digits accuracy, AC voltage up to 600 volts with plus or minus 2 percent plus 10 digits accuracy, and current ranges from 2 milliamps to 10 amps for AC and DC. It also measures resistance, capacitance, and diodes, and includes a live detection feature, NCV sensing, data hold, and automatic shutdown.
The listing does not mention True RMS, so the True RMS feature is Not stated in the listing. The included components field reads a slash, so the included parts are Not stated in the listing. The warming tips call for 1.5-volt AA cells, which is the only power detail given. The battery test feature covers 12-volt, 9-volt, and 7.5-volt batteries, which makes it useful for checking a vehicle or household battery. The meter weighs 155 grams and has an LED screen.
Who it suits: a buyer who wants a low-cost handheld meter for voltage, current, resistance, and battery checks. Who should skip it: anyone who needs to measure current without breaking the circuit, or anyone who needs True RMS confirmed.
4. Klein Tools CL120 Digital Clamp Meter (400 A AC)
Klein Tools CL120 Digital Clamp Meter, Auto-Ranging 400 Amp AC
This is an AC clamp meter with an auto-ranging feature that picks the measurement range for you. The listing gives a 400-amp AC current range, and it measures AC current through the clamp. The listing does not give DC current through the clamp, so the DC clamp reading is Not stated in the listing. The clamp also has a non-contact voltage tester built into the jaw, and the meter measures AC and DC voltage, resistance, and continuity through the test leads.
The meter has a backlit display, a data hold, a max reading, and automatic power-off after 10 minutes to save battery life. A test lead holder sits on the side of the clamp, and the listing names an optional magnetic hanger for hands-free use. The package includes a carrying case, test leads with CAT III and CAT IV safety caps, and three AAA batteries. The warranty is available from the manufacturer’s website rather than naming a term, so the warranty is Not stated in the listing. The meter weighs about 9.8 ounces. True RMS is not mentioned, so it is Not stated in the listing.
Who it suits: an electrician or a homeowner who needs an AC clamp meter with a known brand, a backlight, and a built-in voltage detector. Who should skip it: anyone who needs DC current through the clamp, or anyone who needs True RMS confirmed.
5. FNIRSI DMC-100 True RMS Clamp Meter (9999 or 10000 counts)
FNIRSI DMC-100 Clamp Meter 9999 Counts TRMS, 600A AC/DC Amp Meter
This is a True RMS clamp meter that covers AC and DC current up to 600 amps. It provides stable TRMS measurement for current, voltage, resistance, capacitance, frequency, and temperature. It also includes non-contact voltage detection, live wire testing, continuity, and diode checks. The display is a 2-inch color TFT screen with 10 brightness levels and light and dark themes.
The count is Not confirmed: the title says 9999 counts, while the feature text and style field say 10000. Those are close, but the listings disagree, so check the figure on the product page. The meter records graph data, storing 8 sets of real-time readings and 30 sets of historical records, which helps when you are tracking an intermittent fault. The built-in 1500-milliamp-hour lithium battery charges over USB Type-C, so you do not need to replace batteries. The clamp is for current only, and voltage must be measured with the test leads.
The listing names several uses: vehicle battery drain tracking, RV DC system analysis, and residential appliance repair. It weighs 6.7 ounces, and the listed dimensions are 7.7 by 2.9 by 1.1 inches. The listing names UL 61010-1, CE, and RoHS compliance. Who it suits: a buyer who wants AC and DC current, True RMS, and a rechargeable meter with a graph view for intermittent problems. Who should skip it: anyone who needs the count confirmed before ordering.
6. Fieldpiece SC260 Compact HVACR Clamp Multimeter
This is a True RMS clamp meter designed for HVAC and refrigeration service, which the listing describes as electrical work in hot and cold environments. It measures AC voltage and AC current through the clamp. The listing names AC amperage and AC voltage, so the DC current reading is Not stated in the listing. It also reads temperature and capacitance, with an auto-select mode that detects whether a capacitance or resistance measurement is needed. The meter includes non-contact voltage detection, a continuity warning, a diode test, a backlight, and a swivel magnet for hands-free use.
The weight is Not confirmed: the item weight field reads 0.27 grams, which is not plausible for this meter. Check the weight on the product page. The specification field reads only OEM, which is not a standard, so the safety rating is Not stated in the listing. The included components field lists the meter only, and it does not mention test leads, so the included leads are Not stated in the listing. The listing gives no warranty term.
Who it suits: an HVAC or refrigeration technician who needs True RMS AC current, temperature, and capacitance in one compact meter, with a magnet for hands-free work. Who should skip it: anyone who needs DC current through the clamp, or anyone who needs the weight or safety rating confirmed.
7. LJPXHHU XL830L Digital Multimeter (2000 counts)
This is a handheld multimeter, not a clamp meter. The listing gives a 2000-count display with a 2.7-inch backlit LCD. It measures AC and DC voltage, DC current, resistance, continuity, diodes, and battery voltage. The feature text lists DC current but not AC current, so AC current is Not confirmed, even though the title includes it. The listing mentions overload protection on all ranges, a low-battery indicator, and an audible continuity check.
The meter has a fold-out stand, a removable rubber cover that the listing describes as providing drop protection, and a data hold function. A 9-volt battery is included, along with a set of test leads and a user manual. The listing gives a two-year guarantee. The specification field says “Safety Standards Met” without naming a standard, so the safety rating is Not stated in the listing. The meter weighs 166 grams.
Who it suits: a buyer who wants a rugged handheld meter for voltage, DC current, and battery checks, with a stand for hands-free reading. Who should skip it: anyone who needs AC current confirmed, or anyone who needs to measure current without breaking the circuit.
8. ruicebao K2026A Digital Clamp Meter (6000 counts, 600 A)
This is a 6000-count clamp meter with a 600-amp range. The title says it measures AC and DC current, but “600A DC/DC current” in one line, which conflicts with the title. The current type is Not confirmed for the clamp, so check the product page before you rely on it for AC or DC work. The meter also measures 600 volts AC and DC, capacitance, frequency, duty cycle, resistance, diodes, continuity, and temperature with a Type K thermocouple probe. It includes non-contact voltage detection, alligator clips with wires, a backlit display, a flashlight, data hold, and maximum and minimum readings.
The jaw measures 1.02 inches wide, and the listing describes the meter as suited to narrow spaces. The listing gives an IEC 61010-1 specification and a CAT III 600-volt rating. The contents are described in two places that do not match. The included components field lists the meter, a user manual, and a battery, while the complete-set text lists two AAA batteries, two test probes, two alligator clip leads, a Type K probe, and a carrying case. Confirm the contents on arrival. The meter’s dimensions are 8.3 by 3.5 by 2.4 inches.
Who it suits: a buyer who wants a 600-amp clamp with a temperature probe and alligator clips for hands-free circuit work. Who should skip it: anyone who needs the current type confirmed before buying, or anyone who needs a complete kit as described.
9. Proster CM2000C True RMS Clamp Meter (2000 counts)
Proster Clamp Meter 2000 Counts TRMS, AC Current Clamp Multimeter
This is a True RMS clamp meter with a 2000-count display. The title and the feature text describe AC current up to 600 amps through a 28-millimeter jaw, so the clamp measures AC current only. It measures AC and DC voltage up to 600 volts, resistance from 200 ohms to 20 megohms, and temperature with a K-type thermocouple probe rated from minus 40 to 1,000 degrees Celsius. It also includes non-contact voltage detection, continuity testing, diode checks, and a Hz function.
The meter has a clamp-head light that illuminates the conductor you are measuring, a backlit LCD, and a separate flashlight. Overload appears as OL on the screen, and the meter auto-shuts off after about 15 minutes. The listing gives a CE and UL specification and includes a soft zippered pouch. The meter weighs about 0.2 kilograms. The listing names household, lab, factory, and radio-technology use.
Who it suits: a buyer who wants a True RMS AC clamp with a light on the jaw, temperature reading, and non-contact voltage detection in one meter. Who should skip it: anyone who needs DC current through the clamp, since the listing describes AC current only.
10. UNI-T UT210E Mini Digital Clamp Meter (100 A AC/DC)
This is a small clamp meter with a 100-amp range for AC and DC current. The title lists True RMS, and the listing describes the meter as a clamp meter with multimeter functions that include AC and DC voltage, resistance, capacitance, and diodes. It also includes a non-contact voltage test and a VFC function, which the listing describes as reducing interference from high-frequency signals in the measurement. The current resolution is listed at 1 milliamp, which the listing describes as useful for small currents.
The listing is short on some details. The display count, the jaw size, the battery type, the safety rating, and the warranty are Not stated in the listing. The meter weighs 170 grams and measures about 2.4 by 6.9 by 1.3 inches. The listing describes it as small enough to fit in a pocket.
Who it suits: a buyer who wants a pocket-size clamp for AC and DC current up to 100 amps with True RMS in the title. Who should skip it: anyone who needs a 400- or 600-amp range, a published count, or a published safety rating before ordering.
11. MAYILON MY2610D True RMS Clamp Meter (6000 counts)
This is a 6000-count True RMS clamp meter that measures AC and DC current and AC and DC voltage. The listing also gives capacitance, frequency, duty cycle, resistance, temperature, diode, continuity, and live wire tests. It includes non-contact voltage detection with audible and visual alarms. The safety certification is listed as CAT III 600 volts and pollution degree 2, with full-range overload protection.
The meter has a backlit LCD, a built-in flashlight, a data hold, a 15-minute auto power-off, and a low-battery indicator. The jaw opens to 1.02 inches. The included components are one clamp meter, two test pens, a pouch, a user manual, and two batteries. The listing includes an important note that the protective cap must be removed before using the test leads. The meter is designed, according to the listing, for professionals and hobbyists.
Who it suits: a buyer who wants AC and DC current, True RMS, and a 6000-count display in a clamp with a flashlight and two batteries in the box. Who should skip it: anyone who needs a jaw larger than about one inch, since the listing gives a 1.02-inch opening.
Side-by-side comparison
The table below pulls the figures from each listing. Any figure marked Not confirmed or Not stated has a conflict or a gap, explained in the product section above.
| # | Model | Type | AC/DC clamp current | True RMS | Counts | Jaw | Safety rating | Power and included parts |
|---|---|---|---|---|---|---|---|---|
| 1 | AstroAI AM33D | Handheld multimeter | No clamp | Not stated | 2000 | Not applicable | CAT II 600V, CAT III 300V | Battery type Not confirmed |
| 2 | Temirup CM87C | Clamp | AC and DC, 600 A | Yes | 6000 | 30 mm | Overload to 600V (CAT not stated) | Two AAA, temperature probe |
| 3 | ANENG SZ301 | Handheld multimeter | No clamp | Not stated | 2000 | Not applicable | Not stated | Not stated |
| 4 | Klein CL120 | Clamp | AC only | Not stated | Not stated | Not stated | CAT III and CAT IV caps | Three AAA, case |
| 5 | FNIRSI DMC-100 | Clamp | AC and DC, 600 A | Yes | Not confirmed | Not stated | UL 61010-1 | Rechargeable, Type-C |
| 6 | Fieldpiece SC260 | Clamp | AC only | Yes | Not stated | Not stated | Not stated | Meter only listed |
| 7 | LJPXHHU XL830L | Handheld multimeter | No clamp (AC current Not confirmed) | Not stated | 2000 | Not applicable | Not stated | 9V battery, leads |
| 8 | ruicebao K2026A | Clamp | Not confirmed (AC or DC) | Not stated | 6000 | 1.02 in | CAT III 600V | Contents Not confirmed |
| 9 | Proster CM2000C | Clamp | AC only, 600 A | Yes | 2000 | 28 mm | CE, UL | Clamp set, pouch |
| 10 | UNI-T UT210E | Clamp | AC and DC, 100 A | Yes | Not stated | Not stated | Not stated | Not stated |
| 11 | MAYILON MY2610D | Clamp | AC and DC | Yes | 6000 | 1.02 in | CAT III 600V | Two batteries, pouch |
Read the table with the gaps in mind. For a meter that measures both AC and DC current through a clamp and reads True RMS, the Temirup, FNIRSI, UNI-T, and MAYILON listings are the four that state all three features. The Temirup and MAYILON listings also give a 6000-count display, and the MAYILON and Temirup listings both include a battery kit.
Who should buy an AC/DC True RMS clamp meter
Buy a True RMS clamp meter that measures AC and DC current if your work involves motors, HVAC equipment, vehicles, or circuits where the waveform is not a clean sine wave. The four products that state all three features (Temirup, FNIRSI, UNI-T, and MAYILON) are the closest match to the title of this guide. Choose among them by the current range you need, the count you want, and the extras you use.
The Temirup is the choice if you want an inrush reading for motor startup and a temperature probe in the same meter. The FNIRSI is the choice if you want a rechargeable meter with a graph view for intermittent problems. The UNI-T is the choice if you want a small meter that fits in a pocket and measures up to 100 amps. The MAYILON is the choice if you want a 6000-count display, a flashlight, and two batteries in the box.
Who should skip this category
Skip the handheld multimeters if you need to measure current without breaking the circuit, since they have no clamp. The AstroAI, ANENG, and LJPXHHU meters are useful for voltage, resistance, and battery checks, but not for clamp current.
Skip any AC-only clamp if you need DC current through the clamp. The Klein CL120, Fieldpiece SC260, and Proster CM2000C listings describe AC current only through the clamp.
Skip any listing where the current type, the count, or the safety rating is marked Not confirmed or Not stated if you need that figure for your job. Confirm it before ordering.
Use cases: HVAC work, motor startup, vehicle batteries, and household circuits
HVAC and refrigeration. The Fieldpiece SC260 is built for this work, with True RMS, temperature, capacitance, and a magnet for hands-free use. The Proster adds a K-type thermocouple probe for checking lines and breakers, and its clamp-head light helps you see the conductor in a dark panel. Both are AC-only through the clamp, so they fit AC systems but not DC circuits.
Motor startup current. The Temirup has an inrush function that records the maximum current when a machine starts, which the listing describes as a way to locate a start-up problem in the motor or its circuit. The feature note limits the inrush reading to AC, so check that note before relying on it for DC equipment.
Vehicle batteries and DC systems. The FNIRSI lists vehicle battery drain tracking and RV DC system analysis. Its graph recording helps when a drain is intermittent. The ANENG and LJPXHHU handheld meters have battery test features for 12-volt and 9-volt batteries, which suit basic checks but not clamp current.
Household circuits and appliances. The UNI-T is small enough for a pocket and reads AC and DC current up to 100 amps. The Klein CL120 has a built-in voltage detector in the jaw for checking whether a wire is live, which the listing describes as a convenience for electrical work.
Narrow spaces. Several jaws are about one inch wide, which the listings say fits standard cables. The Temirup has a 30-millimeter jaw and the Proster a 28-millimeter jaw, the two widest stated metric openings among the clamps in this set.
Setup, use, and maintenance
The listings give a few practical rules for every meter.
- Zero the DC reading. The Temirup to press the zero key before measuring DC current, which clears the reading.
- Use the test leads for voltage. The FNIRSI voltage must be measured with the leads, not the jaws.
- Remove the test lead cap. The MAYILON to remove the protective cap before using the test leads.
- Watch the battery. Several meters have a low-battery indicator, and a low battery can make readings unreliable. The AstroAI listing notes that a meter may not show results if the leads are not fully inserted or the rotary switch is in the wrong position.
- Charge the rechargeable meter. The FNIRSI uses a built-in 1500-milliamp-hour lithium battery charged by USB Type-C.
- Store the meter with its cover. The Klein CL120 comes with a carrying case, and the Proster includes a soft zippered pouch. A pouch or case protects the jaw and the display.
How to check a listing before you buy
Use this checklist before you order any meter in this group.
- Confirm the current type. A clamp that measures AC only will not read DC current. Check the title and the feature text, and make sure they agree.
- Check True RMS if your work needs it. Listings that do not mention True RMS leave the feature Not stated.
- Check the count and the resolution. A higher count gives more digits of precision on the display.
- Measure the jaw size against your cable. Several listings give a jaw of about one inch.
- Check the safety rating. A CAT rating should match or exceed the circuits you will measure. The manual has the full detail.
- Confirm what is included. Several listings give contents that disagree. Check the test leads, the batteries, and the case.
- Read the battery type. Some listings disagree about the battery. Confirm the type before you buy.
Common mistakes
The first mistake is buying a clamp that measures AC only when the job needs DC. Check the current type before you order.
The second mistake is assuming a multimeter can measure current without breaking the circuit. A handheld multimeter with no clamp jaw cannot do that.
The third mistake is clamping the whole power cable instead of a single conductor. Several listings warn about this directly, because a reading taken around a whole cable can show a misleading value.
The fourth mistake is measuring voltage through the clamp jaws. The FNIRSI the jaws are for current only.
The fifth mistake is trusting a count, a battery type, or a current type that inconsistently. Confirm the figure before you rely on it.
Counts, resolution and what they mean
The counts figure on a meter tells you how fine its readings can be, but a higher number does not always mean a better meter. The Temirup CM87C and the FNIRSI DMC-100 are both listed at 6,000 or more counts with true RMS measurement, and the ZMIWNIED FS899L is listed at 6,000 counts. The AstroAI listing for the 2,000-count meter gives a lower resolution, which is enough for household circuits but less useful for fine voltage checks. Compare counts with the measurement range you need, and check whether the listing names true RMS, since a non-RMS reading can drift on distorted waveforms.
Current range and jaw size
Clamp meters list a maximum current and a jaw opening. The Klein CL120 is listed at 400 amps AC with auto-ranging, and the FNIRSI DMC-100 and Temirup CM87C are both listed at 600 amps. The Proster listing gives a jaw opening of up to 28 millimetres, which is wide enough for a standard cable but may not fit a bundled conductor. Check the jaw size against the cable you will clamp, not just the maximum current.
Extras that change the use
Some listings add features that matter more than the headline specs. The FNIRSI DMC-100 records readings over time and draws a curve on a 2-inch colour screen, which helps when a fault comes and goes. The Fieldpiece SC260 adds temperature, capacitance and an HVAC-focused compact body. The Temirup CM87C has a variable frequency drive filter and a low-impedance mode for measuring voltage on drives and inverters. Pick the extra feature that matches the job, and skip the rest.
Safety ratings
The ZMIWNIED FS899L listing says it meets CAT III 1000 volt and CAT IV 600 volt standards, which is a higher rating than many of the meters in this set. The AstroAI listing for its 2,000-count meter says it passed overvoltage category III 600 volts. A rating describes the environment the meter is built for, so check the category printed on the meter itself and the one in the listing before you test a panel or a service entrance.
Related reading: true RMS digital clamp meter options and AC and DC current clamp meter picks.
Frequently asked questions
Which clamp meters in this set measure both AC and DC current? The Temirup, FNIRSI, UNI-T, and MAYILON listings state AC and DC current through the clamp. The ruicebao listing mentions both in its title, but its feature text is inconsistent, so its current type is Not confirmed.
Which meters state True RMS? The Temirup, FNIRSI, Fieldpiece, Proster, UNI-T, and MAYILON listings state True RMS. The Klein, ruicebao, ANENG, AstroAI, and LJPXHHU listings do not mention it, so it is Not stated for those.
Can I measure a battery with a clamp meter? Some clamp meters measure DC current, which helps when you are tracking a battery drain. The FNIRSI lists vehicle battery drain tracking. Two of the handheld multimeters, the ANENG and LJPXHHU, include battery test features for voltage, but neither clamps around a wire.
Which meter has the widest jaw? The Temirup lists a 30-millimeter jaw, the widest stated opening. The Proster lists 28 millimeters. The ruicebao and MAYILON listings give about 1.02 inches, and the Klein, FNIRSI, Fieldpiece, and UNI-T listings do not state a jaw size.
Do the meters include batteries? Several do. The MAYILON includes two batteries, the Klein includes three AAA batteries, the Temirup takes two AAA batteries, and the LJPXHHU includes a 9-volt battery. The FNIRSI is rechargeable and has a built-in battery. The Proster and the UNI-T do not state their included batteries.
Why are some warranty fields Not stated? The Klein listing refers to the manufacturer’s website rather than a warranty term. The UNI-T and Proster listings do not give a warranty term in the set’s data. Check the product page before you buy.
Is a 2000-count meter good enough for everything? It depends on the work. A 2000-count display is less precise than a 6000-count display, but the right count depends on the readings you need. Check the accuracy specification on the product page for the range you will use most.
Final checklist
Before you choose a clamp meter from this set, confirm five things: the clamp measures the current type you need (AC, DC, or both), the True RMS feature is stated if your work involves non-sine waveforms, the jaw fits the cable, the safety rating covers the circuits you will measure, and the included parts and battery type are what you expect. If you need one meter for AC and DC current with True RMS, the Temirup, FNIRSI, UNI-T, and MAYILON are the four to compare. Any product with a Not confirmed or Not stated figure you depend on needs the seller’s answer before you buy.
