summary

The product is designed uniformly nationwide, with universal connection dimensions and good interchangeability. Adopting an assembled structure, the components are easy to disassemble and maintenance is convenient.

The product price is cheap, and the cost of replacing vulnerable parts is low. The inner lead is insulated with ceramic beads, and the lead is prone to breakage under vibration. The temperature measuring element is in contact with air and its division characteristics are variable after long-term use.

WR thermocouple

WZ thermistor

Prefabricated integrated temperature transmitter

FUNCTION PRINCIPLE

The prefabricated integrated temperature transmitter is composed of a two-wire temperature transmitter installed in the junction box of the prefabricated thermocouple thermistor. Due to its use of assembly

The ordinary waterproof junction box cannot be used in explosion-proof situations or environments with strong vibrations. But it has the advantage of low cost of prefabricated thermocouple and thermistor,

There are also integrated temperature transmitters that can output 4-20mA signals over long distances, with strong anti-interference signals and easy installation and maintenance, making them suitable for non critical positions

Temperature measurement.

Specification

Conversion accuracy ± 0.2%

The temperature measuring element is the same as the assembled thermocouple and thermal resistor. Detailed indicators can be found in the "Overview of Thermocouple Thermal Resistance".

Precautions for use

When the upper limit of temperature measurement is 500 ℃, the exposed length of the protective tube increases from 150mm to 250mm.

When the upper limit of temperature measurement is 800 ℃, insulation measures should be taken for the temperature measurement area to prevent radiation heat from causing excessive temperature in the junction box.

Special attention should be paid to the operating environment temperature for the B and S scale marks of precious metal thermocouples, and integrated forms should generally be avoided as much as possible.

Armored integrated temperature transmitter

FUNCTION PRINCIPLE

The armored integrated temperature transmitter consists of a low-power two-wire temperature transmitter and a temperature sensor. Features: ⑴ Can be installed on site and output directly

4-20mA signal; ⑵ Can be transmitted over long distances without transmission loss; ⑶ Can obtain high-precision measurement results and eliminate terminal contact between sensors and transmitters

The problem of unreliable signals caused by poor quality (which is particularly important for thermal resistors); ⑷ There are fewer transmission lines in the two-line wiring system, and the expensive compensation wires have been removed, which makes installation and maintenance easier

Convenient protection and cost reduction; ⑸ Adopting armored temperature measuring elements, with pressure resistance, earthquake resistance, stable and reliable operation, and long service life; The protective tube and temperature measuring element are separable

Off structure, able to quickly replace temperature measuring components and achieve non-stop repair; There are various forms and materials of protective pipes, which can meet the requirements of high temperature, high pressure, and strong corrosive media

Temperature measurement requirements; It has the advantages of low cost of prefabricated thermocouple and thermistor, as well as an integrated temperature transmitter that can output 4-20mA signals over long distances,

The advantages of strong anti-interference signal and easy installation and maintenance make it suitable for temperature measurement in non critical locations.

Main technical indicators conversion accuracy ± 0.2%

Precautions for use: The assembly type ordinary waterproof junction box is used, so it cannot be used in explosion-proof situations or environments with strong vibration

When using an integrated temperature transmitter, due to its proximity to the heat source, the working environment temperature may be high, and measures should be taken to prevent the junction box from operating at high temperatures

Exceeding its allowable value of 85 ℃.

When the upper limit of temperature measurement is 500 ℃, the exposed length of the protective tube needs to be increased from 150mm to 250mm.

When the upper limit of temperature measurement is 800 ℃, insulation measures should be taken for the temperature measurement area to prevent radiation heat from causing excessive temperature in the junction box.