Best Electrician Clamp
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This roundup covers five clamp meters and kits from the research file for an electrician clamp search. The file also holds several alligator clip and test lead sets. We read “clamp” as a clamp meter, so those sets are left out. Figures are copied from the listings as the sellers state them and dated 11 October 2026. Where a listing gives two figures that do not match, both are shown.
Quick answer: for mains cable, check the jaw opening before the amp rating. A jaw that is too small will not close on a thick cable at all. For loads above 400 amps, the FNIRSI DMC-100, the Neoteck and the Proster, whose title gives 800 amps, are the picks to check.
The five picks at a glance
| Clamp meter | Listed AC current | Jaw or wire size (as listed) | Best fit |
|---|---|---|---|
| FNIRSI DMC-100 (B0DP2L9CFR) | 600 A AC and DC | Not stated | Logging and automotive checks |
| Proster 6000 Count (B075Z1GH5L) | Title says 800 A | 28 mm jaw | Mains cable with a wide jaw |
| Neoteck 4000 Count (B0FL76KQ1X) | 600 A AC | 25 mm jaw | Low-current mode and CAT III 600 V |
| ANENG 4000 Count (B0B9RKFJ2R) | 400 A AC | 1.42 inch maximum wire | Double-open jaws on thick wire |
| Klein CL120VP Kit (B08N9G3913) | Clamp reads AC, value not stated | Not stated | Kit with receptacle and NCV testers |
How we chose these five
We kept listings whose title or bullets describe a clamp meter or a clamp meter kit. Each was read for AC current range, jaw or wire size, voltage and safety figures, and the accessories in the box. A figure the listing does not state is reported as not stated. We did not check any meter in person, and the file holds no bench results.
- Current: the AC current range the listing states, and whether it says DC current is measured.
- Jaw: the largest cable the clamp can take, as the listing gives it.
- Kit contents: the extra testers and leads in the box.
1. FNIRSI DMC-100 Clamp Meter
The DMC-100 is listed as a true RMS clamp meter for AC and DC current up to 600 A, with voltage, resistance, capacitance, frequency and temperature. The title gives 9999 counts, while a bullet gives 10000 counts for the same meter, and both are shown here. Its listing names NCV detection and a graph recording mode that stores 8 sets of real-time data and 30 sets of history. The 2 inch color screen has ten brightness levels and light and dark themes. A built-in 1500 mAh battery charges from a Type-C cable. The listing says voltage must be measured with the test leads, and that the jaws are for current only. It weighs 6.72 ounces and measures 7.7 by 2.91 by 1.14 inches. Checked 11 October 2026.
2. Proster 6000 Count Clamp Meter
The Proster is listed as a 6000 count TRMS clamp meter. Its title gives an 800 A figure, but the bullets describe the jaw by size only, a 28 mm opening that the listing says measures AC current on mains cables and high-current loads. It has auto-ranging, a non-contact AC voltage alarm for 90 V to 1000 V, a continuity buzzer below 50 ohms, a diode test and a K-type temperature input. A backlit display and a clamp light help in dark spaces. The listing gives automatic power-off after 15 minutes of inactivity and a soft zippered pouch. It weighs 0.37 kg and measures 7.28 by 2.56 by 1.26 inches. Checked 11 October 2026.
3. Neoteck 4000 Count Clamp Meter
The Neoteck is listed with a 4000 count display, 600 A AC current, 600 V AC and DC voltage, and a 1 A low-current mode for precise low-power circuits. Its listing states CAT III 600 V and a 25 mm clamp jaw. It names NCV detection for 90 V to 1000 V AC with an audible and visual alarm, a backlit display and a flashlight. It includes a K-type thermocouple, test leads, three AAA batteries, a user manual and a pouch. The listing gives 18 months of warranty and weighs 195 g. Its notes say to start on the highest range and to clamp one wire only, since the clamp reads a single conductor. Checked 11 October 2026.
4. ANENG 4000 Count Clamp Meter
The ANENG is listed with 4000 counts. It measures AC current from 0 to 400 A, AC and DC voltage up to 600 V, resistance up to 40 megohms, capacitance up to 4 mF and frequency up to 4 MHz. The listing says DC current is not measured. Its double-open jaws are described as taking a wire up to 1.42 inches across, the largest jaw in this group. It has NCV detection, a diode test, data hold and a backlit screen. The listing advises pressing REL to zero the meter before clamping. The package is a clamp meter kit with a combination test lead set and a capacitor test lead. The listing gives two weights: an item weight of 0.6 g in one field and a weight of 129 g in another. Checked 11 October 2026.
5. Klein Tools CL120VP Electrical Voltage Test Kit
The CL120VP is a kit built around the CL120 clamp meter, which the listing says reads AC current through the clamp and AC and DC voltage, resistance and continuity through the test leads. The clamp also gives non-contact voltage detection, according to the listing. Auto-ranging picks the range, and the clamp has a lead holder and an optional magnetic hanger. The kit adds a GFCI receptacle tester that the listing says finds open ground and reverse polarity, and a separate non-contact voltage detector. The listing gives CE and a manufacturer warranty, but no CAT category. It weighs 1.8 pounds and the kit measures 13.07 by 8.5 by 2.95 inches. Checked 11 October 2026.
Worked example: will the jaw close on the cable?
For example, take a 1 inch cable, which is 25.4 mm. The Neoteck’s 25 mm jaw is 0.4 mm too small, so it will not close around that cable. The Proster’s 28 mm jaw takes it with 2.6 mm to spare. The ANENG’s listed maximum of 1.42 inches is about 36 mm (1.42 times 25.4), so it takes a cable about 8 mm wider than the Proster. These figures are arithmetic from the jaw sizes in the listings.
The current range gives a second check. A 500 A load is above the 400 amp limit on the ANENG, but inside the 600 amp AC ranges listed for the FNIRSI and the Neoteck, and inside the 800 amp figure in the Proster title. A 250 A load fits the ANENG as well.
What the listings do not say
None of the five listings gives an independent accuracy test, so the current and voltage figures are the sellers’ statements. The FNIRSI and Klein listings give no jaw size, and the Klein listing gives no CAT category. The ANENG and FNIRSI listings each show a figure that does not match another line in the same listing, and both are reported above without choosing one. Check the rating printed on the meter before live work.
Frequently asked questions
Can a clamp meter measure DC current?
The FNIRSI DMC-100 listing states AC and DC current up to 600 A. The ANENG listing says DC current is not measured. The Neoteck and Klein listings describe AC current only. The Proster listing names AC current through its jaw.
Which clamp is the widest?
The ANENG listing gives a maximum wire size of 1.42 inches, about 36 mm, which is the largest figure in this group. The Proster jaw is 28 mm and the Neoteck jaw is 25 mm. The FNIRSI and Klein listings give no jaw size.
Does the Klein kit include anything beyond the clamp?
Yes. The listing says the kit includes a GFCI receptacle tester, a non-contact voltage detector, test leads and a pouch. The other four picks are single clamp meters, although the ANENG listing includes test leads.
Why do some listings show two different figures?
The FNIRSI listing gives 9999 counts in its title and 10000 counts in a bullet. The ANENG listing gives 0.6 g and 129 g as weights in different fields. Neither figure has been chosen here, so check the figure on the meter or in the manual before you rely on it.
What is the most important check before clamping a cable?
Confirm that the cable fits the jaw. The Neoteck’s 25 mm jaw will not close around a 1 inch cable, while the Proster’s 28 mm jaw will. Then start on the highest current range, as the Neoteck listing advises, and clamp one conductor only.
Conclusion
For thick mains cable, the Proster 28 mm jaw and the ANENG double-open jaws are the two picks with the widest listed openings. For a higher current range, the FNIRSI DMC-100 and the Neoteck list 600 A AC. The Klein CL120VP kit is the choice when a receptacle tester and a voltage detector are wanted in the same package. Check the jaw size and the current range against your cable before you buy.
For more on clamp meters, see best AC DC current clamp meter, best true RMS digital clamp meter, and how does a current clamp work.
FNIRSI DMC-100 · Proster 6000 Count · Neoteck 4000 Count · ANENG 4000 Count · Klein CL120VP Kit
