Wholesale of bearing thermocouples

NegotiableUpdate on 01/30

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Bearing thermocouple is a type of temperature sensing element, belonging to contact temperature measuring instruments. Like temperature control instruments, it is the most commonly used temperature measuring element in industrial production. Its material is generally expensive, usually composed of two different types of metal wires. It converts temperature signals into thermoelectric potential signals, converting electrical instruments into the temperature of the measured medium. The principle of temperature measurement is to form a closed circuit with two homogeneous conductors of different compositions. When there is a temperature gradient at both ends, there is a current passing through the circuit, and there is a thermoelectric potential between the two ends. Two homogeneous conductors with different compositions are thermoelectric electrodes.

Product Details

range specification

category	code name	graduation mark	Temperature measurement range ℃	accuracy class	Allowable deviation △ t
Nickel chromium nickel silicon	WRNT	K	0-800	I	± 1.5 ℃ or ± 0.004 ∣ t ∣
				II	± 2.5 ℃ or ± 0.0075 ∣ t ∣
Nickel chromium copper nickel	WRET	E	0-600	I	± 1.5 ℃ or ± 0.004 ∣ t ∣
				II	± 2.5 ℃ or ± 0.0075 ∣ t ∣
Copper Copper Nickel	WRCT	T	-40-350	I	± 0.5 ℃ or ± 0.004 ∣ t ∣
				II	± 1 ℃ or ± 0.75% t
rtd	WZPT	Pt100	-200-500	*	±（0.15+0.002∣t∣）
				Grade B	±（0.30+0.005∣t∣）
copper resistance	WZCT	Cu50	-50-100	II	±（0.30+6.0X10^-3t）

Note: "t" represents the measured temperature of the temperature sensing element, while for platinum and copper resistors, it represents the measured temperature of the temperature sensing element.

Nominal Pressure

Generally refers to the static external pressure that the protective tube can withstand without breaking at room temperature, and the test pressure is generally 1.5 times the nominal pressure. In fact, the allowable working pressure is not only related to the material, diameter, and wall thickness of the protective tube, but also to its structural form, installation method, insertion depth, as well as the flow rate and type of the measured medium.

Thermocouple insulation resistance:

The test voltage for room temperature insulation resistance is 500V DC. The atmospheric conditions for measuring room temperature insulation resistance are: temperature 15-35 ℃, relative humidity 45%, and atmospheric pressure 86-106Kpa.

For thermocouples with a length exceeding 1 meter, the product of their insulation resistance at room temperature and their length shall not be less than 100 megaohms per meter,

Namely: Rr · L ≥ 100M Ω m L ＞ 1m

In the formula: Rr - the insulation resistance value of the thermocouple at room temperature, M Ω;

The length of the L-thermocouple, m。

For thermocouples with a length of 1 meter or less, their insulation resistance at room temperature should not be less than 100 M Ω.

Thermal resistance insulation resistance:

The test voltage for insulation resistance at room temperature can be any value between 10-100V DC, the ambient temperature should be within the range of 15-35 ℃, the relative humidity should not exceed 80%, and the insulation resistance value at room temperature should not be less than 100 M Ω.