This manual describes the functions and uses of the Extech MO257 Pinless Moisture Meter.
The Extech MO257 Pinless Moisture Meter uses high-frequency sensing technology to monitor moisture in wood and other building materials without causing surface damage. The device features a backlit LCD display, programmable alarms for DRY, RISK, and WET conditions, and an auto power-off function to conserve battery energy.
The guide details the meter's operation, including the calibration procedure required before first use and whenever the meter is moved. It explains how to set alarm thresholds and provides a moisture comparison table for typical materials like gypsum, cement, and wood.
| Measurement Depth | 20 to 40mm (0.79 to 1.57") |
|---|---|
| Display Type | Backlit LCD |
| Operating Temperature | 4 to 43°C (40 to 110°F) |
| Power Supply | Three (3) 1.5V 'AAA' batteries |
| Auto Power Off | After 30 minutes of inactivity |
| Dimensions | 235 x 63 x 28mm (9.2 x 2.5 x 1.1") |
The meter can sense moisture to a depth of 20 to 40mm (0.79 to 1.57 inches).
The meter will hold the reading for 30 seconds before automatically shutting down.
The meter requires three (3) 1.5V 'AAA' batteries.