HVAC service calls for more than current. A temperature input checks supply and return air and line temperatures, DC microamps through the test leads check a furnace’s flame sensor, and inrush mode shows how hard a compressor starts. Each clamp here has temperature and at least one of the other two.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best HVAC Clamp Meters: AC only
- Klein Tools CL445#1 of 2Full review
An HVAC clamp with inrush, flame-sensor microamps and a CAT IV rating at a mid-range price.
Amazon $94.85$94.85600 ANoCAT IV 600 V / CAT III 750 V - Fluke 902 FC#2 of 2Full review
An HVAC technician’s clamp from Fluke with flame-rod microamps, temperature and a phone app.
Amazon $329.97$329.97600 ANoCAT IV 300 V / CAT III 600 V
Best HVAC Clamp Meters: AC/DC
- Extech EX655#1 of 4Full review
A well-equipped AC/DC clamp with a three-year warranty, for HVAC and maintenance technicians.
Amazon $173.50$173.50600 A600 ACAT III 600 V / CAT II 1,000 V - Klein Tools CL390#2 of 4Full review
An affordable true-RMS AC/DC clamp that suits DIY solar, automotive and general electrical work.
Amazon $86.27$86.27400 A400 ACAT III 600 V - Klein Tools CL490#3 of 4Full review
The CL390’s AC/DC measurements with an extra bottom display, for electricians who often read a meter at an awkward angle.
Amazon $101.66$101.66400 A400 ACAT III 600 V - UNI-T UT216C#4 of 4Full review
A feature-packed 600 A AC/DC clamp for HVAC and electrical work at a mid-range price.
Amazon $114.29$114.29600 A600 ACAT III 600 V / CAT II 1,000 V
Best HVAC Clamp Meters: 1,000 A and up
- KAIWEETS HT208D#1 of 4Full review
The cheapest way to a 1,000 A AC/DC clamp with a CAT IV rating, for DIYers and electricians on a budget.
Amazon $79.99$79.991,000 A1,000 ACAT IV 600 V / CAT III 1,000 V - Klein Tools CL910#2 of 4Full review
A 2,000 A, 2,000 V AC/DC clamp for solar installers and industrial electricians working on high-voltage DC.
Amazon $208.99$208.992,000 A2,000 ACAT IV 600 V / CAT III 2,000 V - Klein Tools CL900#3 of 4Full review
A rugged 2,000 A AC/DC clamp that gives electricians most of a premium meter’s features at a mid-range price.
Amazon $182.65$182.652,000 A2,000 ACAT IV 600 V / CAT III 1,000 V - UNI-T UT208B#4 of 4Full review
A 1,000 A AC/DC clamp with nearly every troubleshooting mode for well under the price of a brand-name equivalent.
Amazon $135.99$135.991,000 A1,000 ACAT IV 600 V / CAT III 1,000 V
