Armoured thermocouple how to prevent the leakage

Armoured thermocouple measuring principle and common thermocouple is no different, just some protection to the outside of the temperature measuring element material is different. Ordinary heat resistance is outside of the detecting element set have a coarser stainless steel protect casing, the outer diameter is generally more than 12 mm. Its purpose is in order to improve the anticorrosion ability, on the one hand, on the other hand is to strengthen its mechanical strength. This is to solve the problem on the one hand, but the other side is the measurement of lag, under the condition of the measurement system requirements is not soon, is ok, but in some cases. For example, flash furnaceanalyze the jacket cooling water temperature detection system, is the temperature requirements can quickly reflect that point. So, it is proposed the armored thermal resistance problem.

armoured thermocouple is not on the outside of the normal detecting element on very thick protective casing, but with a very fine brass or stainless steel tube set in the outside, the smallest diameter of only 3 mm, magnesium oxide or other insulating material will be filled with middle two wire isolation resistance, heat quickly, eliminate the lag time of temperature measurement, meet the requirements of rapid detection of temperature. Armored thermal resistance is by thermal components ( The resistor body) , wire, insulation materials, stainless steel casing combination solid body, compared with the normal thermal resistance, it has the following advantages: (1) small volume, no internal air gap and thermal inertia, small measuring hysteresis; (2) good mechanical properties, resistance to vibration and shock. (3) can bend, easy to install (4) long service life.

armoured thermocouple, thermocouple with a slender, flexible, fast thermal response time, resistance to vibration, high temperature resistance, compressive strength and durability, etc. It can be used for temperature measurement directly, also can be used as inner core components fabricated thermal resistance, thermocouple, beads to replace the traditional porcelain shell element. Product is especially suitable for installation

in the pipeline between narrow, bending and require rapid response, miniaturization and special temperature measuring occasions.

armoured thermocouple as a direct measurement or control the fluid temperature in the process of production of products, use rise more convenient and easy to maintain. However, leakage phenomenon, but it is common to many customer problems. Do you know how to prevent? Small make up five small approaches in this summary, the hope can help you.

1, keep armoured thermocouple don't contact with refractory brick.

2, negative ground armoured thermocouple, eliminate the leakage on the armoured thermocouple signal.

3, adding filtering devices in armoured thermocouple output.

4, from the hot junction of armoured thermocouple earth grounding.

5, on the armored thermocouple tube and jacket heat-resistant steel pipe or carborundum tube, and make it grounded.

using the above method, is to fix the instrument can work normally in severe condition, ensure the instrument accuracy refers to the temperature, temperature control, records, and make all kinds of instruments play a proper role.