MOISTURE CONTENT MEASURING APPARATUS

摘要

PURPOSE: To suppress the deviation of measurement between two types of meters by providing an AC signal generator having output connected with a sensor probe being applied to a substrate, and an amplifier having input connected with the sensor probe. CONSTITUTION: The water content meter 1 is provided with an AC high frequency signal generator 2 having output connected with a sensor probe 5 comprising a metal rod or needle touching a substrate. The water content meter 1 is further provided with an amplifier 6 having input connected with the sensor probe 5 through a capacitor 7 where the amplifier 6 has impedance as high as 100kΩin order to suppress disturbance. According to the arrangement, perturbation of amplifier and detection means due to the generator 2 can be prevented by insulating the individual components from radiation and electricity through physical isolation between the generator 2 and amplifier 6 and between the generator 2 and a detection means 8.