Klein Tools CL445
#1 in AC onlyFull review
An HVAC clamp with inrush, flame-sensor microamps and a CAT IV rating at a mid-range price.
Amazon $94.85$94.85
600 ANoCAT IV 600 V / CAT III 750 V
3.5/5
An HVAC technician’s clamp from Fluke with flame-rod microamps, temperature and a phone app.
- 600 AAC current
- NoDC current
- CAT IV 300 V / CAT III 600 VSafety
Check price at Amazon$329.97
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Reads flame-sensor microamps, temperature and capacitance for furnace and AC service
- Sends readings to a phone app so you can watch from a safe distance
- Three-year warranty
Cons
- No DC current through the jaw and no inrush mode
- No non-contact voltage detector
- Expensive for an AC-only clamp
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 | FLUKE-902 FC |
|---|---|
| Measurement | |
| AC current (jaw) | 600 A |
| DC current (jaw) | No |
| DC microamps (leads) | 200 uA |
| Voltage | 600 V |
| Current accuracy | 2% of reading |
| Safety | |
| CAT rating | CAT IV 300 V / CAT III 600 V |
| Features | |
| True RMS | Yes |
| Inrush | No |
| LoZ mode | No |
| Non-contact voltage | No |
| Low-pass filter | No |
| Temperature | Yes |
| Phone app | Yes |
| Build | |
| Weight | 419 g |
| Warranty | 3 years |
Alternatives in this type
Klein Tools CL220
#3 in AC onlyFull review
A low-cost true-RMS AC clamp for home and light electrical work, with temperature for basic HVAC checks.
Amazon $69.97$69.97
400 ANoCAT III 600 V
Extech MA440
#4 in AC onlyFull review
A plain true-RMS AC clamp for electricians and technicians who only need current, voltage and resistance.
Amazon $66.99$66.99
400 ANoCAT III 600 V
Compare
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