Klein Tools
Klein Tools ET140 Pinless Moisture Meter
$49.97Cheaper
Best Moisture Meters · head-to-head
Klein Tools ET140 Pinless Moisture Meter vs Extech MO55 Combination Pin/Pinless Moisture Meter
A sourced, side-by-side comparison. Klein Tools ET140 Pinless Moisture Meter is cheaper at $49.97. Every spec and price links to its source.
Which is better: the Klein Tools ET140 Pinless Moisture Meter or Extech MO55 Combination Pin/Pinless Moisture Meter?
On the specs we track, they're closely matched. The Klein Tools ET140 Pinless Moisture Meter is the cheaper at $49.97.
See Klein Tools ET140 Pinless 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 | Klein Tools ET140 Pinless Moisture Meter |  Extech MO55 Combination Pin/Pinless Moisture Meter |
|---|---|---|
| US price | $49.97 | $124 |
| Brand | Klein Tools | Extech |
| Released | — | — |
| Measurement range pct | 0-100% (relative) | Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99% |
| Pin vs pinless | Pinless | Pin and Pinless (combination) |
| Material calibration groups | Drywall, masonry, hardwood, softwood | Wood (low/medium/high), other building materials (low/medium/high) |
| Sensing depth (in) | 0.75 | 1 |
| Accuracy | ±4% | ±(3% of reading + 5 digits) |
| Hold peak function | Yes | Yes |
| Audible alarm | Yes | Yes |
| Display type | Reverse-contrast LCD + 9-segment LED bar graph, 0.1% resolution | LCD with low/medium/high icons |
Sources — Klein Tools ET140 Pinless Moisture Meter: kleintools.com (verified 2026-08-05). Extech MO55 Combination Pin/Pinless Moisture Meter: extech.com (verified 2026-08-05).
What's the difference between the Klein Tools ET140 Pinless 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: Klein Tools ET140 Pinless Moisture Meter 0-100% (relative) vs Extech MO55 Combination Pin/Pinless Moisture Meter Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99%
- Pin vs pinless: Klein Tools ET140 Pinless Moisture Meter Pinless vs Extech MO55 Combination Pin/Pinless Moisture Meter Pin and Pinless (combination)
- Material calibration groups: Klein Tools ET140 Pinless Moisture Meter Drywall, masonry, hardwood, softwood vs Extech MO55 Combination Pin/Pinless Moisture Meter Wood (low/medium/high), other building materials (low/medium/high)
- Sensing depth (in): Klein Tools ET140 Pinless Moisture Meter 0.75 vs Extech MO55 Combination Pin/Pinless Moisture Meter 1
- Accuracy: Klein Tools ET140 Pinless Moisture Meter ±4% vs Extech MO55 Combination Pin/Pinless Moisture Meter ±(3% of reading + 5 digits)
- Display type: Klein Tools ET140 Pinless Moisture Meter Reverse-contrast LCD + 9-segment LED bar graph, 0.1% resolution vs Extech MO55 Combination Pin/Pinless Moisture Meter LCD with low/medium/high icons