COT thermocouple for ethylene cracking furnace

    1、High precision     2、Small temperature drift    3、Low hysteresis     4、Long service life

 Technical characteristics：

1. The sensor adopts Class I armored thermocouple, and the shell is made of hydrogen and sulfur resistant alloy material, which greatly reduces the poisoning of hydrogen, acid and sulfur elements and avoids temperature drift;

2. The protection pipe shall be made of high temperature, corrosion resistant and erosion resistant alloy materials under high temperature, and shall be polished. In this way, the tar that has not been burnt is not easy to stick to the outer wall of the casing, extending the service life and reducing the temperature hysteresis;

3. The measuring end shall be made into a special shape according to the hydromechanics principle to reduce the scouring resistance, thus reducing the scouring, reducing the viscous oil and improving the service life;

4. The thermal insulation layer is made of materials with small thermal conductivity and temperature resistance to reduce heat source dispersion and ensure measurement accuracy;

5. The ultra-thin measuring end protective sleeve design greatly reduces the heat transfer time and greatly improves the sensitivity of the thermocouple;

6. Accurate insertion depth is the key to accurate temperature measurement. The test proves that 1 ℃ will be reduced if less insertion is 1 mm.