Title
Temperature and Pressure Test Results Using Thermocouple, Thermistor and Band Gap Temperature Sensors
Start Date
30-6-2016 2:55 PM
End Date
30-6-2016 3:20 PM
Abstract
Understanding the precision and accuracy of thermocouple, thermistor, and digital band-gap sensors in low temperature and pressure environments is critical to interpreting high altitude balloon temperature measurements down to -60C and pressures down to 10 millibars. In this study we used GT-1 thermocouples as our temperature standard, and tested HOBO thermistors, NeuLog thermocouples and DS18B20 digital band gap sensors for accuracy. Results indicate that the accuracy of these temperature sensors varies significantly in the -80C to 100C temperature range. In addition, the precision of DS18B20 digital band-gap sensors was tested using a low-pressure chamber at room temperature and -40C temperatures. Under these conditions, typical sensor-to-sensor variability was no more than ±0.5C at room temperature, and no more than ±3C at -40C. Reduced pressure did not have a significant effect on variability.
Temperature and Pressure Test Results Using Thermocouple, Thermistor and Band Gap Temperature Sensors
Understanding the precision and accuracy of thermocouple, thermistor, and digital band-gap sensors in low temperature and pressure environments is critical to interpreting high altitude balloon temperature measurements down to -60C and pressures down to 10 millibars. In this study we used GT-1 thermocouples as our temperature standard, and tested HOBO thermistors, NeuLog thermocouples and DS18B20 digital band gap sensors for accuracy. Results indicate that the accuracy of these temperature sensors varies significantly in the -80C to 100C temperature range. In addition, the precision of DS18B20 digital band-gap sensors was tested using a low-pressure chamber at room temperature and -40C temperatures. Under these conditions, typical sensor-to-sensor variability was no more than ±0.5C at room temperature, and no more than ±3C at -40C. Reduced pressure did not have a significant effect on variability.