The WRN-231 card sleeve threaded armored thermocouple has many advantages such as bending ability, high voltage resistance, fast thermal response time, and durability. Like industrial assembled thermocouples, it is commonly used as a transmitter for measuring temperature and is usually used in conjunction with display instruments, recording instruments, and electronic regulators. It can also be used as a temperature sensing element for assembled thermocouples. It can directly measure the temperature of liquid, steam, gas media and solid surfaces within the range of 0-800 ℃ during the production process of various types of products, and the sleeve thread can be fixed in any position.

The working principle of armored thermocouples is that two conductors with different compositions are welded at both ends to form a circuit. The temperature measuring end is called the working end, and the wiring terminal end is called the cold end, also known as the reference end. When there is a temperature difference between the working end and the reference end, a thermal current will be generated in the circuit. When connected to a display instrument, the instrument will indicate the corresponding temperature value of the thermoelectric potential generated by the thermocouple. The thermoelectric potential of armored thermocouples will increase as the temperature at the measuring end rises. The magnitude of the thermoelectric potential is only related to the material of the thermocouple conductor and the temperature difference at both ends, and is independent of the length and diameter of the thermoelectric electrode.

The structural principle of armored thermocouple is: it is made of a conductor, high insulation magnesium oxide, and a protective tube made of 1Cr18Ni9Ti stainless steel, which is drawn multiple times as a whole. Armored thermocouple products are mainly composed of junction boxes, terminal blocks, and armored thermocouples, and are equipped with various installation and fixing devices.

Armored thermocouples are divided into two types: insulated and shell connected.

Basic technical indicators:

1. T is the value of the measured temperature
2. T-type indexing products need to be ordered in consultation with the company's business personnel

Armored thermocouple thermal response time:

When there is a step change in temperature, the time taken for the output of the thermocouple to change to 50% of the step change is called the thermal response time, represented by τ 0.5.

Product execution standards: IEC584, GB/T16839-1997, JB/T5582-1991