Extech EX655
#2 in AC/DCFull review
A well-equipped AC/DC clamp with a three-year warranty, for HVAC and maintenance technicians.
Amazon $173.50$173.50
The Extech EX655 is the better clamp meter overall, rated 3.7 to 3.5. The Extech EX655 leads on price. The Amprobe AMP-220 wins on accuracy and jaw opening. The Extech EX655 costs $70.49 less ($173.50 vs $243.99).
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.
Amprobe AMP-220
#6 in AC/DCFull review
An accurate AC/DC clamp for motor and drive maintenance, priced above rivals with similar features.
Amazon $243.99$243.99
Which should you buy?
- Choose the Extech EX655 for price ($173.50 vs $243.99).
- Choose the Amprobe AMP-220 for accuracy (1.8% of reading vs 2.5% of reading) and jaw opening (35 mm jaw vs 30 mm jaw).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every AC/DC clamp meter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Extech EX655 | Amprobe AMP-220 |
|---|---|---|
| Overall rating | 3.7/5 | 3.5/5 |
| Current range 15% | 60 600 A through the jaw | 60 600 A through the jaw |
| DC current 15% | 100 DC current to 600 A through the jaw | 100 DC current to 600 A through the jaw |
| Safety rating 20% | 55 CAT III 600 V / CAT II 1,000 V | 55 CAT III 600 V |
| Features 15% | 60 true RMS, inrush, non-contact voltage, temperature | 60 true RMS, inrush, non-contact voltage, low-pass filter |
| Accuracy 10% | 33 2.5% of reading | 80 1.8% of reading |
| Jaw opening 5% | 33 30 mm jaw | 50 35 mm jaw |
| Warranty 10% | 100 3-year warranty | 0 warranty not published, scored as none |
| Price 10% | 46 $173.50 | 31 $243.99 |
Specifications
| Extech EX655 | Amprobe AMP-220 | |
|---|---|---|
| Measurement | ||
| AC current (jaw) | 600 A | 600 A |
| DC current (jaw) | 600 A | 600 A |
| Voltage | 1,000 V | - |
| Current accuracy | 2.5% of reading | 1.8% of reading |
| Jaw opening | 30 mm | 35 mm |
| Safety | ||
| CAT rating | CAT III 600 V / CAT II 1,000 V | CAT III 600 V |
| Features | ||
| True RMS | Yes | Yes |
| Inrush | Yes | Yes |
| LoZ mode | No | No |
| Non-contact voltage | Yes | Yes |
| Low-pass filter | No | Yes |
| Temperature | Yes | No |
| Phone app | No | No |
| Build | ||
| Weight | 265 g | - |
| Warranty | 3 years | - |