# General Tools MMD4E Pin-Type LCD Moisture Meter vs Extech MO55 Combination Pin/Pinless Moisture Meter: specs and price compared

A sourced, side-by-side comparison of the General Tools MMD4E Pin-Type LCD Moisture Meter (General Tools) and Extech MO55 Combination Pin/Pinless Moisture Meter (Extech) among moisture meters. General Tools MMD4E Pin-Type LCD Moisture Meter is the cheaper of the two at $43.8.

## Side by side

| Spec | General Tools MMD4E Pin-Type LCD Moisture Meter | Extech MO55 Combination Pin/Pinless Moisture Meter |
| --- | --- | --- |
| US price | $43.8 | $104.78 |
| Brand | General Tools | Extech |
| Measurement range pct | 5-50% wood; 1.5-33% building materials | Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99% |
| Pin vs pinless | Pin | Pin and Pinless (combination) |
| Material calibration groups | Wood (low/medium/high), building materials (low/medium/high) | Wood (low/medium/high), other building materials (low/medium/high) |
| Sensing depth (in) | 0.3 | 1 |
| Accuracy | ±2%, 0.1% resolution | ±(3% of reading + 5 digits) |
| Hold peak function | Yes | Yes |
| Audible alarm | Yes | Yes |
| Display type | Backlit LCD, 99.9-count, 0.3 in. digits | LCD with low/medium/high icons |

## Key differences

- Measurement range pct: General Tools MMD4E Pin-Type LCD Moisture Meter 5-50% wood; 1.5-33% building materials vs Extech MO55 Combination Pin/Pinless Moisture Meter Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99%
- Pin vs pinless: General Tools MMD4E Pin-Type LCD Moisture Meter Pin vs Extech MO55 Combination Pin/Pinless Moisture Meter Pin and Pinless (combination)
- Material calibration groups: General Tools MMD4E Pin-Type LCD Moisture Meter Wood (low/medium/high), building materials (low/medium/high) vs Extech MO55 Combination Pin/Pinless Moisture Meter Wood (low/medium/high), other building materials (low/medium/high)
- Sensing depth (in): General Tools MMD4E Pin-Type LCD Moisture Meter 0.3 vs Extech MO55 Combination Pin/Pinless Moisture Meter 1
- Accuracy: General Tools MMD4E Pin-Type LCD Moisture Meter ±2%, 0.1% resolution vs Extech MO55 Combination Pin/Pinless Moisture Meter ±(3% of reading + 5 digits)
- Display type: General Tools MMD4E Pin-Type LCD Moisture Meter Backlit LCD, 99.9-count, 0.3 in. digits vs Extech MO55 Combination Pin/Pinless Moisture Meter LCD with low/medium/high icons

## Sources

- General Tools MMD4E Pin-Type LCD Moisture Meter: https://generaltools.com/pin-type-lcd-moisture-meter (generaltools.com, verified 2026-08-05)
- Extech MO55 Combination Pin/Pinless Moisture Meter: https://www.extech.com/products/mo55/ (extech.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/moisture-meters/general-tools-mmd4e-vs-extech-mo55/
Cite: Per The Front Desk Review, General Tools MMD4E Pin-Type LCD Moisture Meter ($43.8) vs Extech MO55 Combination Pin/Pinless Moisture Meter ($104.78) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/moisture-meters/general-tools-mmd4e-vs-extech-mo55/
License: CC BY 4.0.