Clamp Meters Compared: 3 Listings
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This page compares three clamp meters from the research set, with listing data checked on 2026-10-11. The keyword names an SC680 meter, but none of the twelve listings in that research file is an SC680 model. The closest name in the set is the Fieldpiece SC260, which is a different model. The page therefore covers the clamp meter product type the keyword points to, and it does not claim any listing is the SC680.
A clamp meter is judged on its current range, its voltage and resistance functions, and its display. Each listing below states those figures in its own fields, and where two listings give conflicting numbers for the same feature, both numbers are shown.
Quick answer
The Klein CL120 states a 400 amp AC range, and it has a separate non-contact voltage tester built into the clamp jaw. The FNIRSI DMC-100 states the highest current range, 600A AC/DC, and it is the only one of the three that states AC and DC current from the clamp. The Fieldpiece SC260 is an HVACR-oriented unit that states AC voltage and amperage readings, but its listing gives a weight figure that is not plausible for the item, so that field should not be relied on.
The FNIRSI listing gives two counts figures, 9999 in its title and 10000 in its bullets. Both are shown in the table.
Comparison table
| Listing | Stated current range | Stated voltage and other functions | Display or features | Weight and size |
|---|---|---|---|---|
| Klein Tools CL120 | Auto-ranging, 400 amp AC | AC/DC voltage, resistance, continuity via test leads; NCVT built into the clamp jaw | Backlit LCD | 9.76 ounces; 8.45 x 3.51 x 1.51 inches |
| FNIRSI DMC-100 | 600A AC/DC | TRMS voltage, resistance, capacitance, frequency | 2 inch TFT color display; 10-level brightness | 6.72 ounces; 7.7 x 2.91 x 1.14 inches |
| Fieldpiece SC260 | AAC readings (range not stated in fields reviewed) | VAC readings, NCV, temperature, capacitance, continuity, diode test | Backlight; True RMS | Weight listed as 0.27 g (not plausible); 3.5 x 3 x 9.1 inches |
Klein Tools CL120 Digital Clamp Meter
View the Klein Tools CL120 on Amazon
The Klein CL120 listing carries the title Auto-Ranging 400 Amp AC. Its bullets state that the clamp measures AC current and has a non-contact voltage tester integrated into the jaw. Voltage, resistance, and continuity are taken with the test leads rather than the clamp. The listing describes a backlit LCD for low light. It is battery powered, its measurement types are listed as ammeter, voltmeter, and ohmmeter, and it carries a double insulation safety rating and a CE mark. The listing gives a weight of 9.76 ounces and dimensions of 8.45 x 3.51 x 1.51 inches. The model is CL120.
FNIRSI DMC-100 Clamp Meter
View the FNIRSI DMC-100 on Amazon
The FNIRSI listing gives the widest current range of the three. Its title names 600A AC/DC, and its bullets state TRMS measurement of AC and DC current up to 600A, along with voltage, resistance, capacitance, and frequency. The bullets state a 10000 count TRMS meter, while the title gives 9999 counts. The display is a 2 inch TFT color screen with 10 brightness levels and a dual-theme option. The bullets say voltage and current can be shown at the same time. A real-time curve recording feature is described, along with a storage function whose count is cut off in the research file. The listing gives a weight of 6.72 ounces, dimensions of 7.7 x 2.91 x 1.14 inches, and marks for UL 61010-1, CE, and RoHS.
Fieldpiece SC260 Compact HVACR Clamp Multimeter
View the Fieldpiece SC260 on Amazon
The Fieldpiece listing is a compact true RMS clamp multimeter for HVACR service, and its bullets describe use in hot and cold environments. It states higher accuracy AC voltage and AC current readings, along with temperature, capacitance, and a backlight. Its bullets also name non-contact voltage detection, amperage readings, a continuity warning, and a diode test. The listing gives no current range in the fields reviewed, so the amperage capability can be read only as a function. The listing shows an item weight of 0.27 g, which is not plausible for a clamp meter of this size, so the weight should be confirmed on the product page. It lists two UPC values in one field, and it is battery powered.
How we chose
The research file for this keyword held twelve listings. Three are clamp meters, and those three are compared here. The other nine are a tape measure, a Stetzerizer meter, three kWh meters (Meterly, XaHo, and JINDOUZI), and four multimeters (AstroAI, ZMIWNIED, LJPXHHU, and ANENG). None of them is a clamp meter, so none is compared here. The page does not use price or rating data.
Worked example: comparing the two AC current top ranges
The Klein CL120 title gives 400 amps AC, and the FNIRSI title gives 600A AC/DC. The FNIRSI top range is 200 amps higher, which is 1.5 times the Klein figure. Those are rated ranges, not measured results, so the comparison shows only what each listing states. A reader who expects to measure above 400 amps would find the Klein listing outside its stated range and the FNIRSI listing inside its stated range. A reader whose work stays below 400 amps would see both listings inside their ranges, and the other fields would decide between them.
The FNIRSI counts give a second worked check, since its title and bullets disagree. The difference is one count in the stated figure, which is small, but the listing gives two numbers for one spec, so the shopper should confirm which figure applies on the product page.
What the listings do not say
The Fieldpiece SC260 listing gives no current range in the fields reviewed, and its item weight of 0.27 g does not match the item. The listing also lists two UPC values in one field, which is another sign that the data needs a check on the product page. The Klein CL120 listing states an AC current range in its title but does not give a DC current figure, while the FNIRSI listing states both AC and DC current in its title.
None of the three listings gives an accuracy figure in the fields reviewed. The Klein and FNIRSI listings give dimensions and weight, and the Fieldpiece listing gives dimensions but a weight that is not plausible for the item.
FAQ
Is the SC680 one of these clamp meters?
No. None of the twelve listings in the research file is an SC680 model. The Fieldpiece SC260 is the closest name, and it is a different model.
Which clamp meter in this set has the highest stated current range?
The FNIRSI DMC-100 states 600A AC/DC, which is higher than the 400 amp AC range on the Klein CL120. The Fieldpiece SC260 gives no current range in the fields reviewed.
Does the Klein CL120 include a non-contact voltage tester?
Yes. The bullets state that a non-contact voltage tester is integrated into the clamp jaw. Voltage, resistance, and continuity are taken with the test leads.
Why does the FNIRSI listing show two counts figures?
The title says 9999 counts and the bullets say 10000 counts. The listing does not explain the difference, so the figure should be confirmed on the product page.
Conclusion
These three clamp meters cover different ranges and feature sets. The FNIRSI DMC-100 has the highest stated current range and the most detailed display data. The Klein CL120 has a stated 400 amp AC range and a built-in non-contact tester. The Fieldpiece SC260 states amperage and non-contact functions, but its weight figure cannot be relied on and it gives no current range. The keyword asks about an SC680, which is not in the set, so the choice is made on the clamp meter specs only.
Amazon links
- Klein Tools CL120 Digital Clamp Meter
- FNIRSI DMC-100 Clamp Meter
- Fieldpiece Compact HVACR Clamp Multimeter SC260
Related reading: Best True RMS Digital Clamp Meter, Best Handheld Clamp, Best Clamp Tester Fluke, and Best AC DC Current Clamp Meter.
