8.21 Capacitive humidity sensor. A simple humidity sensor, although not the most sensitive, may be obtained by measuring

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8 21 Capacitive Humidity Sensor A Simple Humidity Sensor Although Not The Most Sensitive May Be Obtained By Measuring 1 (37.4 KiB) Viewed 47 times

8.21 Capacitive humidity sensor. A simple humidity sensor, although not the most sensitive, may be obtained by measuring the capacitance of an air-filled parallel plate capacitor. Consider a capacitor with two plates, each 4 cm² in area with a 0.2 mm separation between plates. a. Calculate and plot the capacitance expected from the sensor for the range between 10% RH and 90% RH at an ambient temperature of 25°C. b. Calculate the sensitivity of the sensor.