# Fluke 323 True-RMS Clamp Meter vs Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter: specs and price compared

A sourced, side-by-side comparison of the Fluke 323 True-RMS Clamp Meter (Fluke) and Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter (Southwire) among clamp meters.

## Side by side

| Spec | Fluke 323 True-RMS Clamp Meter | Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter |
| --- | --- | --- |
| US price | $207.99 | not published |
| Brand | Fluke | Southwire |
| Ac current range | 400.0 A, 2.0% ±5 digits (45-65 Hz) / 2.5% ±5 digits (65-400 Hz) | 400 A |
| Dc current range | — | 400 A (per user-facing marketing copy and verified purchaser reviews on southwire.com describing DC clamp-amp use; exact numeric DC accuracy table not published on the fetched product page) |
| Jaw opening | 30 mm (600 MCM) | — |
| Ac dc voltage range | 600.0 V AC (1.5% accuracy) / 600.0 V DC (1.0% accuracy) | — |
| True rms | Yes | Yes |
| Resistance continuity | 400.0/4000 Ω, 1.0% accuracy; continuity beeper ≤70 Ω | — |
| Capacitance | — | Yes |
| Temperature | — | Yes |
| Cat safety rating | CAT III 600V / CAT IV 300V | CAT III 600V |
| Display count | — | — |

## Key differences

- Ac current range: Fluke 323 True-RMS Clamp Meter 400.0 A, 2.0% ±5 digits (45-65 Hz) / 2.5% ±5 digits (65-400 Hz) vs Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter 400 A
- Cat safety rating: Fluke 323 True-RMS Clamp Meter CAT III 600V / CAT IV 300V vs Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter CAT III 600V

## Sources

- Fluke 323 True-RMS Clamp Meter: https://www.fluke.com/en-us/product/electrical-testing/clamp-meters/fluke-323 (fluke.com, verified 2026-08-05)
- Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter: https://www.southwire.com/tools-equipment/test-measurement/21550t-clamp-meter-400a-ac-dc/p/65031840 (southwire.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/clamp-meters/fluke-323-vs-southwire-21050t/
Cite: Per The Front Desk Review, Fluke 323 True-RMS Clamp Meter ($207.99) vs Southwire 21050T / 21550T 400A True RMS AC/DC Clamp Meter (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/clamp-meters/fluke-323-vs-southwire-21050t/
License: CC BY 4.0.