Abstract: Most of the domestic thermal response time tests for temperature sensors are conducted in 90 ℃ silicone oil by oil bath method,and the test method is single without considering the relationship between the actual use environment of temperature sensors and the test environment,and the test method is manual test with low efficiency and poor reproducibility.To solve this problem,an automatic test device for thermal response time of temperature sensor is designed based on Labview software.The thermal response time of PT100 platinum resistor,PT1000 platinum resistor and thermistor temperature sensor is tested,and the influence of different packaging and heating methods on the thermal response time of temperature sensor is analyzed.It is proved that different packaging methods and heating methods have great influence on the thermal response time test.The test device studied can be applied to the response time measurement of all types of temperature sensors.

Key words: Temperature sensor, Thermal response time, Dynamic characteristics, Automatic test equipment