An HVAC technician’s clamp from Fluke with flame-rod microamps, temperature and a phone app.
Amazon $329.97
An HVAC clamp with inrush, flame-sensor microamps and a CAT IV rating at a mid-range price.
- 600 AAC current
- NoDC current
- CAT IV 600 V / CAT III 750 VSafety
- 32 mmJaw
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
- Inrush mode, DC microamps and temperature cover compressor, furnace and flame-sensor checks
- Rated CAT IV 600 V
- Thin jaw reaches into crowded HVAC cabinets
- Reads AC current only through the jaw
- Smaller 1.25 in jaw than most clamps
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | CL445 |
|---|---|
| Measurement | |
| AC current (jaw) | 600 A |
| DC current (jaw) | No |
| DC microamps (leads) | 600 uA |
| Voltage | 750 V |
| Current accuracy | 2% of reading |
| Jaw opening | 32 mm |
| Safety | |
| CAT rating | CAT IV 600 V / CAT III 750 V |
| Features | |
| True RMS | Yes |
| Inrush | Yes |
| LoZ mode | No |
| Non-contact voltage | Yes |
| Low-pass filter | No |
| Temperature | Yes |
| Phone app | No |
| Build | |
| Weight | 357 g |
| Warranty | 2 years |
Alternatives in this type
A low-cost true-RMS AC clamp for home and light electrical work, with temperature for basic HVAC checks.
Amazon $69.97A plain true-RMS AC clamp for electricians and technicians who only need current, voltage and resistance.
Amazon $66.99Compare
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