Characteristics of thermistors as temperature sensors on the sensor unit (SU-6803) and OP amp unit (OU-6801)

It has successfully conducted a routine practicum with the theme of thermistor characteristics as a temperature sensor on the Sensor Unit (SU-6803) and OP Amp Unit (OU-6801) in the Sensor and Transducer Laboratory of the Department of Physics, FMIPA IPB Bogor. The installed specifications of the Sensor Unit (SU-6803) include: (i) Detection Circuit: Wheatstone Bridge; (ii) Temperature Source: Heater and cooler by fan; (iii) Sense Resistance: 50Ω∼5kΩ; (iv) Heater Control Input: H-Level (DC 5∼15V); (v) Cooler (Fan) Control Input: H-Level (DC 5∼15V); (vi) Sensor Device: Thermistor; (vii) Input Voltage: DC±15V, 1A. Specifications installed Sensor Unit (SU-6803) aided by OP Amp Unit (OU-6801). Temperature measurement uses a thermistor as a temperature sensor under two conditions, namely (i) Heater condition and (ii) cooler condition, with measurement time for 18 minutes with a 3 minutes step and with 12 replications. The measurement results show that the higher the measurement time, the higher the measurement temperature (for Heater conditions), and the higher the measurement time, the lower the measurement temperature (for Cooler conditions). The relationship between Temperature with electrical energy follows a quadratic function. This shows that the thermistor used is working well.