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A clamp meter measures current without touching the wire. It is handy for appliances and HVAC.
Electrical work can be dangerous. Always follow the instructions, use the right safety rating for the job and call a licensed electrician if you are unsure.
This guide is built from Amazon product listings, not our own testing, so confirm specs, safety ratings and current price on each product page.
Prices are approximate US dollar conversions of what Amazon showed on October 31, 2026.
Last updated: October 31, 2026.
Quick Picks
| Product | Type | Best for |
|---|---|---|
| AstroAI Digital Clamp Meter (2000 Counts) | Budget clamp meter | Auto-ranging for AC amps |
| AstroAI Digital Clamp Meter (4000 Counts) | Clamp meter | More counts, auto-ranging |
| Digital Clamp Meter Multimeter (TRMS 6000) | True RMS clamp meter | TRMS and auto-ranging |
| Klein Tools CL120 | 400A clamp meter | Professional brand |
| Klein Tools CL120VP Voltage Test Kit | Clamp meter kit | Clamp meter plus voltage tester |
Our Picks
1. AstroAI Digital Clamp Meter (2000 Counts)
An AstroAI digital clamp meter multimeter with 2000 counts, per the listing. It was shown at about $25 on Amazon.com on October 31, 2026.
Good for: Auto-ranging for AC amps. Watch out: basic range.
2. AstroAI Digital Clamp Meter (4000 Counts)
An AstroAI digital clamp meter multimeter with 4000 counts and auto-ranging, per the listing. It was shown at about $36 on Amazon.com on October 31, 2026.
Good for: More counts, auto-ranging. Watch out: check CAT rating on the page.
3. Digital Clamp Meter Multimeter (TRMS 6000)
A digital clamp meter multimeter with TRMS 6000 counts and auto-ranging, per the listing. It was shown at about $34 on Amazon.com on October 31, 2026.
Good for: TRMS and auto-ranging. Watch out: lesser-known brand.
4. Klein Tools CL120
A Klein Tools CL120 digital clamp meter with auto-ranging and 400 amp AC, per the listing. It was shown at about $64 on Amazon.com on October 31, 2026.
Good for: Professional brand. Watch out: higher price.
5. Klein Tools CL120VP Voltage Test Kit
A Klein Tools CL120VP electrical voltage test kit with clamp meter, per the listing. It was shown at about $76 on Amazon.com on October 31, 2026.
Good for: Clamp meter plus voltage tester. Watch out: higher price.
How to Choose
Amp range
400A suits household use.
True RMS
Better for non-linear loads.
Safety rating
Check the CAT rating.
Frequently Asked Questions
What is a clamp meter?
It measures current through a clamp.
Cheapest?
AstroAI 2000 counts.
Brand?
Klein.
Bottom Line
For value, the AstroAI. For professional, the Klein CL120 or CL120VP.
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