Sensor device for contactless measuring of temperatures by using magnetic materials in the vicinity of phase crossovers

摘要

The device has a sensor (2) for determining temperature or temperature change within a temperature operation range. The sensor has a bias plate (30) formed from a sensor material (3) whose critical temperature lies within the temperature operation range. The material is magnetically soft or the sensor has a resonator plate (50) made of a soft magnetic material (5) that has periodically variable magnetization as response to an external time-variant magnetic field. A detector detects a magnetic field emitted from the sensor material or magnetic material for identification of the temperature. The sensor is formed as a cold chain monitoring sensor.