Extech MO280 Theory of Operation
The square sensor on the rear of the instrument sends and receives a low power electromagnetic signal through the material under test. The LCD shows the average relative moisture content (in %) of the material under test to a max. depth of 20mm. Moisture that is closer to the surface of the material under test has a greater effect on the average than moisture deeper in the material. The MO280 is an auto-calibration device; no user calibration is needed The thickness of the sample under test must be at least 3/4” (20mm). If the sample is thinner, use a stack of samples to measure. Also, the measurement area of the sample should be larger than the MO280 sensor area which is 1.6 x 1.6” (40 x 40mm).
Extech MO280 Features:
- Features 0 to 99 percent measurement range (limited by wood type)
- Quickly indicates the moisture content of materials
- Select from 10 wood types and measurement ranges
- LCD displays % moisture of wood or material being tested
- Automatic internal test and calibration
- Measurement depth to 0.75″ (22mm) below the surface
- Electro-magnetic testing technology
- Low battery indication
- Complete with 9V battery and pouch case
