Patent ID: 9018963
Filing Date: 2015-04-28
Classification: G01K,G01N

Abstract:
1. An environment sensor comprising: a sensor portion detecting a specific physical quantity in an environment, the sensor portion comprising a first electrode plate, a second electrode plate, and a dielectric that is provided between the first electrode plate and the second electrode plate, so that an electrostatic capacitance between the first electrode plate and the second electrode plate changes in accordance with the specific physical quantity; and a power supply portion applying an AC voltage between the first electrode plate and the second electrode plate, wherein: the sensor portion is structured so as to have an impedance that is higher than that of a sensor portion of a conventional environment sensor; and the distance between the first electrode plate and the second electrode plate, and the surface areas of the first electrode plate and the second electrode plate, are set depending on the impedance of the sensor portion.