Dm200concrete water testing instrument adopted the high frequency principle based on the introduction of the most advanced technology from foreign country. In other words, there is a fixed frequency inside the equipment. Once the moisture of the detected objects carried, the frequency through the sensor will be different. The deference between the frequencies will be displayed in figure after the conversion by current-frequency converter. Dm200 concrete moisture meterwork principle This instrument adopted the high frequency principle based on the introduction of the most advanced technology from foreign country. In other words, there is a fixed frequency inside the equipment. Once the moisture of the detected objects carried, the frequency through the sensor will be different. The deference between the frequencies will be displayed in figure after the conversion by current-frequency converter. Dm200 concrete moisture meter specification Its integrative design convenientto carry outside for testing. Digital display with back light gives exact and clearly reading although you stay at the somber conditions. It is small in size, light in weight , easy to carry out for fieldwork if needed. Manual off at any time .Auto power off after 5 minutes from last operation. Specification Display:4 digital lcd Measuring range 0%-80% Operating conditions: Temperature:0-60 Humidity:5%-90% Resolusion:0.1 Accuracy: â± 0.5%n Power supply: 9v battery (6f22) Dimensions: 160mm60mm25mm Weight:203g (not including batteries)