Armored thermocouple

An armored thermocouple is a type of temperature sensor that measures temperature by noting that the resistance of a substance changes with temperature changes. It has a smaller diameter than prefabricated platinum resistors and is easily bent,

Classification:

Thermocouple

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1. Overview of Armored Thermocouples

An armored thermocouple is a type of temperature sensor that measures temperature by noting that the resistance of a substance changes with temperature changes. When the resistance value changes, the working instrument displays the temperature value corresponding to the resistance value. It has a smaller diameter than prefabricated platinum resistors and is easily bent, making it suitable for installation in narrow pipelines and special situations requiring rapid response and miniaturization. It can automatically detect gases, liquid media, and solid surfaces, and can be directly connected to secondary instruments using copper wires. Due to its excellent electrical output characteristics, it can provide precise input values for displays, recorders, regulators, scanners, data recorders, and computers.

2. Application

It is usually used in conjunction with display instruments, recorders, electronic computers, and similar devices. Directly measures the temperature of liquids, steam, and gas media, as well as solid surfaces, within the 0°C~1300°C range in various production processes.

3. Features · Low thermal response time reduces dynamic error; · Can be installed and used with bends; · Large measurement range; · High mechanical strength and excellent voltage resistance;

4. Working Principle: The electrode of the armored thermocouple is composed of two different conductor materials. When there is a temperature difference between the measuring and reference terminals, a thermoelectric potential is generated, and the working instrument displays the temperature value corresponding to the thermoelectric potential.

5. Technical parameters

Temperature measurement range and accuracy

Category	Codename	Degree number	Sleeve outer diameter mm	Common temperature °C	Maximum operating temperature: °C	Allowable deviation
Category	Codename	Degree number	Sleeve outer diameter mm	Common temperature °C	Maximum operating temperature: °C	Measurement range: °C	Fair and accurate value
Platinum-rhodium-10-platinum	WRPK	S	≥Φ3	1100	1200	0-1200	± 1.5°C or ± 1.5%t
Nickel-chromium - copper-nickel	WREK	E	≥Φ3	600	700	0-700	± 2.5°C or ± 0.75%t
Nickel-Chromium-Nickel Silicon	WRNK	K	≥Φ3	800	950	0-900	± 2.5°C or ± 0.75%t
Copper-Nickel	WRCK	T	≥Φ3	350	400	Less than -200	No regulations were made
Copper-Nickel	WRCK	T	≥Φ3	350	400	-40-350	±0.75%t
Iron-copper-nickel	WRFK	J	≥Φ3	500	600	0-600	± 2.5°C or ± 0.75%t