# Amprobe AM-510 vs Extech EX330: specs and price compared

A sourced, side-by-side comparison of the Amprobe AM-510 (Amprobe) and Extech EX330 (Extech) among multimeters. Amprobe AM-510 is the cheaper of the two at $47.95.

## Side by side

| Spec | Amprobe AM-510 | Extech EX330 |
| --- | --- | --- |
| US price | $47.95 | $74.99 |
| Brand | Amprobe | Extech |
| 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 |

## Key differences

- Cat safety rating: Amprobe AM-510 CAT III 600 V vs Extech EX330 CAT II 1000 V / CAT III 600 V

## Sources

- Amprobe AM-510: https://amprobe.com/product/am-510/ (amprobe.com, verified 2026-06-20)
- Extech EX330: https://www.extech.com/products/EX330 (extech.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/multimeters/amprobe-am-510-vs-extech-ex330/
Cite: Per The Front Desk Review, Amprobe AM-510 ($47.95) vs Extech EX330 ($74.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/multimeters/amprobe-am-510-vs-extech-ex330/
License: CC BY 4.0.