Product brief introduction: armored thermocouple can bend, high temperature, fast thermal response time and durable and so on, it and industrial assembly type thermocouple, as a measurement of the temperature sensor and display instrument, usually, recording instruments and electronic regulator supporting the use of, at the same time, also can be used as assembly type thermocouple temperature sensing element, it can be directly measured in various production processes from 0 ℃ to800 ℃within the liquid, steam and gas and solid surface temperature.

Working principle

Armored thermocouple principle is composed of two different components of the conductor ends by welding, to form a loop, direct temperature measuring end called measuring terminal, terminal call reference end. When the measuring end and the reference temperature at the end there, will be produced in loop thermal current, connected to display instrument, the instrument will indicate the thermocouple produced by the thermoelectric EMF corresponding temperature.

Armored thermocouple measurements of thermal emf will end with the temperature rise, only the size of Thermal EMF and armoured thermocouple conductor material and the temperature difference between the two ends, and the hot electrode length, diameter.

Armored thermocouple structure is composed of a conductor, an insulating MgO and 1Cr18Ni9Ti stainless steel tube by repeatedly drawn from, armoured thermocouple products are mainly composed of a junction box, terminal and sheathed thermocouple components of the basic structure, and with a variety of mounting and fixing device.

Armored thermocouple insulation type and shell type two.

The temperature measurement range and accuracy

Category code indexing on the casing outside diameter mm commonly used temperature maximum service temperature allows the deviation t

Measuring range allowable difference

Nickel chromium copper nickel WREKøE≥36007000~ 700± 2.5℃± 0.75%t

Nickel chromium-nickel silicon WRNK K ≥ø 38009000~ 900± 2.5℃± 0.75%t

Copper copper nickel WRCKøT≥3350400 < -200did not make a provision

-40

350 ± 0.75%t

Armored thermocouple thermal response time

The temperature step change occurred, the thermocouple output changes to the equivalent to the step change of 50%, the time required is called thermal response time, expressed by t0.5

Sheathed thermocouple and thermal response time is less than the following requirements:

Thermal response time t0.5S shell type insulated type

Casing diameter ( min )

20.40.5

30.61.2

40.82.5

51.24

626

848

Insulation resistance

When the ambient air temperature of 20± 15℃, relative humidity of not more than80 ﹪, insulated armored thermocouple thermocouple wire and an outer tube between the insulation resistance value should be in accordance with the following table.

Casing diameter mm test voltage insulation resistance MΩ.M V-D.C

From 0.5 to1.550 ±5 ≥1000

> 1.5500+ 50= 1000

Model representation

WR □□□K

- W R

Thermometric element material K.

Fixed form.

Junction box form

(free end form ).

The working end form.

How to type

Temperature instrument thermocouple N nickel chromium-nickel silicon

E,, nickel chromium copper nickel

C copper copper nickel armoured type1 without fixing device type

The 2 fixing sleeve thread

The 3 movable clamping screw

The 4 fixing sleeve flange

The 5 movable clamping sleeve flange 0simple type

2type

3 waterproof type

8handle type

8small junction box

9 with1 insulating type compensating conductor

The 2shell type

The 8shell type ( handle type )9insulation type (3)3to handle type )

4)4 on the

5)5 on the

6)