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General Tools
General Tools MMD4E Pin-Type LCD Moisture Meter
$43.8Cheaper
Best Moisture Meters · head-to-head
General Tools MMD4E Pin-Type LCD Moisture Meter vs Extech MO55 Combination Pin/Pinless Moisture Meter
A sourced, side-by-side comparison. General Tools MMD4E Pin-Type LCD Moisture Meter is cheaper at $43.8. Every spec and price links to its source.
Which is better: the General Tools MMD4E Pin-Type LCD Moisture Meter or Extech MO55 Combination Pin/Pinless Moisture Meter?
On the specs we track, they're closely matched. The General Tools MMD4E Pin-Type LCD Moisture Meter is the cheaper at $43.8.
See General Tools MMD4E Pin-Type LCD Moisture Meter on Amazon See Extech MO55 Combination Pin/Pinless Moisture Meter on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | General Tools MMD4E Pin-Type LCD Moisture Meter |  Extech MO55 Combination Pin/Pinless Moisture Meter |
|---|---|---|
| US price | $43.8 | $124 |
| Brand | General Tools | Extech |
| Released | — | — |
| 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 |
Sources — General Tools MMD4E Pin-Type LCD Moisture Meter: generaltools.com (verified 2026-08-05). Extech MO55 Combination Pin/Pinless Moisture Meter: extech.com (verified 2026-08-05).
What's the difference between the General Tools MMD4E Pin-Type LCD Moisture Meter and Extech MO55 Combination Pin/Pinless Moisture Meter?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- 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