# Extech MA640 True RMS AC/DC Clamp Meter with NCV: specs and price

**Price (US):** Not published (Discontinued; Extech/FLIR's own product page lists the MA640 as replaced by the Extech EX655 and shows no current sell price, so priceUsd is left null rather than guessed from stale retailer caches.), as of 2026-08-05.
**Brand:** Extech (Teledyne FLIR)

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | Not published |
| Brand | Extech (Teledyne FLIR) |
| Ac current range | 60.00 A / 600.0 A |
| Dc current range | 60.00 A / 600.0 A |
| Jaw opening | 1.5 in (40 mm), conductors up to 500 MCM |
| Ac dc voltage range | AC 6.000V/60.00V/600.0V; DC 600.0mV/6.000V/60.00V/600.0V |
| True rms | Yes |
| Resistance continuity | 600.0Ω to 60.00MΩ, with continuity |
| Capacitance | 40.00nF to 4000µF |
| Temperature | -4°F to 1400°F (-20°C to 760°C), Type K |
| Cat safety rating | CAT III 600V |
| Display count | 6000 |

## Where it stands

On the spec sheet, its display count of 6000 is the highest of the 8.

## Frequently asked questions

**How much does the Extech MA640 True RMS AC/DC Clamp Meter with NCV cost?**

The Extech MA640 True RMS AC/DC Clamp Meter with NCV has no published US price as of 2026-08-05.

**What are the Extech MA640 True RMS AC/DC Clamp Meter with NCV's key specs?**

Extech MA640 True RMS AC/DC Clamp Meter with NCV (Extech (Teledyne FLIR)): acCurrentRange 60.00 A / 600.0 A, dcCurrentRange 60.00 A / 600.0 A, jawOpening 1.5 in (40 mm), conductors up to 500 MCM, acDcVoltageRange AC 6.000V/60.00V/600.0V; DC 600.0mV/6.000V/60.00V/600.0V, trueRms Yes. Full sourced spec sheet verified 2026-08-05.

Source: https://www.flir.com/products/ma640?vertical=condition+monitoring&segment=solutions (flir.com, accessed 2026-08-05)
Corroboration: https://www.testequipmentdepot.com/extech-ma640nist-true-rms-acdc-current-clamp-meter-600v-600a-non-contact-voltage-detector-wnist.html (accessed 2026-08-05)
Canonical: https://frontdeskreview.com/product/clamp-meters/extech-ma640/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl