The DT025 sensor is a Thermocouple type K Temperature sensor with a sensing range of 0¸ 1250 ° c. It is extremely accurate, and has a maximum error of 2% over entire range. The DT025 is composed of Fourier Systems’ Egg-Shaped Sensor Case and a 30-cm Thermocouple wire.

A Thermocouple is composed of two long wires, made of different metals, that are connected at one end and are very close (but not connected) at the other end. When the connected end of the thermocouple is placed in a higher temperature than the other end, a voltage will appear between the wires at the other end. This is the principle by which the DT025 works. The DT025 is equipped with another temperature sensor, designed to correct the bias that is caused by the fact that usually BOTH ends of the thermocouple operate in room temperature. Finally, the voltage received after correcting this offset is amplified and adjusted to a range of 0-5 Volts, accepted by the Analog-Digital converter. The proper result is then recorded into the Logger’s memory.

The DT025 comes fully calibrated, and does no require further calibration. However, the DT025 accuracy might decrease due to improper handling. For further calibration the DT025 is equipped with a simple calibration mechanism. In the back of the Egg-Shaped sensor case you will find a small hole. In order to calibrate the sensor you will need a reference temperature. This temperature must be higher than 0° c, and must remain steady during calibration. Insert the end of the wire into the water, then start a data recording. Insert a flat screwdriver into the calibration hole and slowly turn it until the measured value is exactly the same as the reference value. The sensor is now calibrated.

The DT025 sensor is mainly used for measurements of high temperatures, Monitoring chemical processes that occur in high temperatures, or simply monitoring ovens. The high accuracy and reliability of the DT025 makes it an excellent tool for both education and industry.