Amprobe
Amprobe AM-510
$47.95Cheaper
Best Multimeters · head-to-head
Amprobe AM-510 vs Extech EX330
A sourced, side-by-side comparison. Amprobe AM-510 is cheaper at $47.95. Every spec and price links to its source.
Extech
Extech EX330
$74.99
Which is better: the Amprobe AM-510 or Extech EX330?
On the specs we track, they're closely matched. The Amprobe AM-510 is the cheaper at $47.95.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Amprobe AM-510 | Extech EX330 |
|---|---|---|
| US price | $47.95 | $74.99 |
| Brand | Amprobe | Extech |
| Released | — | — |
| Type | digital handheld | digital handheld |
| True rms | No | No |
| Max voltage dc (V) | 600 | 600 |
| Count resolution | 4000 | 4000 |
| Auto ranging | Yes | Yes |
| Cat safety rating | CAT III 600 V | CAT II 1000 V / CAT III 600 V |
| Temperature measurement | Yes | Yes |
| Low impedance loz | No | No |
Sources — Amprobe AM-510: amprobe.com (verified 2026-06-20). Extech EX330: extech.com (verified 2026-06-20).
What's the difference between the Amprobe AM-510 and Extech EX330?
Where the two actually differ on the specs we track (1 of 8). Matching specs are omitted.
- Cat safety rating: Amprobe AM-510 CAT III 600 V vs Extech EX330 CAT II 1000 V / CAT III 600 V