# Extech MO55 Combination Pin/Pinless Moisture Meter vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter: specs and price compared

A sourced, side-by-side comparison of the Extech MO55 Combination Pin/Pinless Moisture Meter (Extech) and Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter (Calculated Industries) among moisture meters.

## Side by side

| Spec | Extech MO55 Combination Pin/Pinless Moisture Meter | Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter |
| --- | --- | --- |
| US price | $104.78 | not published |
| Brand | Extech | Calculated Industries |
| Measurement range pct | Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99% | Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0.1-100% |
| Pin vs pinless | Pin and Pinless (combination) | Pin and Pinless (combination) |
| Material calibration groups | Wood (low/medium/high), other building materials (low/medium/high) | Wood, lumber, firewood, drywall, plaster, brick, concrete |
| Sensing depth (in) | 1 | 0.75 |
| Accuracy | ±(3% of reading + 5 digits) | ±(3% + 3 digits) pin; ±3% pinless |
| Hold peak function | Yes | Yes |
| Audible alarm | Yes | Yes |
| Display type | LCD with low/medium/high icons | Large digits, white LED backlight |

## Key differences

- Measurement range pct: Extech MO55 Combination Pin/Pinless Moisture Meter Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0-99% vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0.1-100%
- Material calibration groups: Extech MO55 Combination Pin/Pinless Moisture Meter Wood (low/medium/high), other building materials (low/medium/high) vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Wood, lumber, firewood, drywall, plaster, brick, concrete
- Sensing depth (in): Extech MO55 Combination Pin/Pinless Moisture Meter 1 vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter 0.75
- Accuracy: Extech MO55 Combination Pin/Pinless Moisture Meter ±(3% of reading + 5 digits) vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter ±(3% + 3 digits) pin; ±3% pinless
- Display type: Extech MO55 Combination Pin/Pinless Moisture Meter LCD with low/medium/high icons vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Large digits, white LED backlight

## Sources

- Extech MO55 Combination Pin/Pinless Moisture Meter: https://www.extech.com/products/mo55/ (extech.com, verified 2026-08-05)
- Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter: https://www.globaltestsupply.com/product/calculated-industries-7445-accumaster-duo-pro-pin-and-pinless-moisture-meter (globaltestsupply.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/moisture-meters/extech-mo55-vs-calculated-industries-7445-accumaster-duo-pro/
Cite: Per The Front Desk Review, Extech MO55 Combination Pin/Pinless Moisture Meter ($104.78) vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/moisture-meters/extech-mo55-vs-calculated-industries-7445-accumaster-duo-pro/
License: CC BY 4.0.