# General Tools MMD4E Pin-Type LCD 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 General Tools MMD4E Pin-Type LCD Moisture Meter (General Tools) and Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter (Calculated Industries) among moisture meters.

## Side by side

| Spec | General Tools MMD4E Pin-Type LCD Moisture Meter | Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter |
| --- | --- | --- |
| US price | $43.8 | not published |
| Brand | General Tools | Calculated Industries |
| Measurement range pct | 5-50% wood; 1.5-33% building materials | Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0.1-100% |
| Pin vs pinless | Pin | Pin and Pinless (combination) |
| Material calibration groups | Wood (low/medium/high), building materials (low/medium/high) | Wood, lumber, firewood, drywall, plaster, brick, concrete |
| Sensing depth (in) | 0.3 | 0.75 |
| Accuracy | ±2%, 0.1% resolution | ±(3% + 3 digits) pin; ±3% pinless |
| Hold peak function | Yes | Yes |
| Audible alarm | Yes | Yes |
| Display type | Backlit LCD, 99.9-count, 0.3 in. digits | Large digits, white LED backlight |

## Key differences

- Measurement range pct: General Tools MMD4E Pin-Type LCD Moisture Meter 5-50% wood; 1.5-33% building materials vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Pin: 5-50% wood, 1.5-33% other materials; Pinless: 0.1-100%
- Pin vs pinless: General Tools MMD4E Pin-Type LCD Moisture Meter Pin vs Calculated Industries 7445 AccuMASTER Duo Pro 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 Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Wood, lumber, firewood, drywall, plaster, brick, concrete
- Sensing depth (in): General Tools MMD4E Pin-Type LCD Moisture Meter 0.3 vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter 0.75
- Accuracy: General Tools MMD4E Pin-Type LCD Moisture Meter ±2%, 0.1% resolution vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter ±(3% + 3 digits) pin; ±3% pinless
- Display type: General Tools MMD4E Pin-Type LCD Moisture Meter Backlit LCD, 99.9-count, 0.3 in. digits vs Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Large digits, white LED backlight

## Sources

- General Tools MMD4E Pin-Type LCD Moisture Meter: https://generaltools.com/pin-type-lcd-moisture-meter (generaltools.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/general-tools-mmd4e-vs-calculated-industries-7445-accumaster-duo-pro/
Cite: Per The Front Desk Review, General Tools MMD4E Pin-Type LCD Moisture Meter ($43.8) 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/general-tools-mmd4e-vs-calculated-industries-7445-accumaster-duo-pro/
License: CC BY 4.0.