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Features of Extech MO257 pinless moisture meters include;

• Relative pinless moisture reading for non-invasive measurement from 0.0 to 100.0 with 0.1 resolution
• Multifunction backlit triple LCD display
• Pinless measurement depth from 0.78" (20mm) to 1.6" (40mm) below the surface
• High frequency sensing technology
• Automatic Data Hold
• Two adjustable alarm levels with audible beeper and visual (flashing “RISK” or “WET”) indicators
• Automatic calibration (in dry air) when meter is powered on
• Low battery indication, Auto Power off
• Complete with 3 AA batteries and pouch case

Technical specifications

Specifications                     % Relative Humidity                          Temperature

Range                                       10 to 85%                                                14 to 122ºF (-10 to 50ºC)

Basic accuracy                         ± 5%                                                        ± 2ºF/1ºC

Resolution                               1%RH                                                      0.1ºC or ºF

Sensor Type                            Resistive ceramic                                     Thermistor

Power                                      One LR44 button battery

Dimensions                             5.9 x 0.8 x 0.7” (150 x 20 x 18mm)