MW3827 element cross section (click to enlarge) Source: MinebeaMitsumiThe MW3827 is a capacitive digital temperature / humidity sensor that uses a proprietary moisture-sensitive film (sensing polymer). By protecting the upper electrode with a moisture-sensitive film, corrosion can be prevented and the influence of foreign matter adhering to the sensor surface can be reduced. As a result, there is almost no deterioration in characteristics due to dust or corrosive gas. Stable measurement is possible from low humidity environment during drying to high humidity including dew condensation. In addition, the response performance to humidity changes is as fast as 6 seconds. The MW3827 has a power supply voltage range of 2.2 to 5.5V, an operating humidity range of 0 to 100% RH, a humidity accuracy (typical value) of ± 2% RH, an operating temperature range of -40 to 105 ° C, and a temperature accuracy (typical value). Is ± 0.5 ° C. The interface is equipped with I2C. The package is supplied as PLP-6L with external dimensions of 2.0 x 2.0 x 0.8 mm. The sample price is 300 yen. The MW3827 is intended for home appliances such as air conditioners, air purifiers and refrigerators, environmental monitoring in smart cities, and applications such as agricultural facilities and medical equipment.