WRK series armored thermocoupleDetailed product description：

The WRK series 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 temperature sensor in conjunction with display instruments, recording instruments, and electronic regulators. At the same time, it can also be used as a temperature sensing element for assembled thermocouples. It can directly measure the temperature of liquid, vapor, gas media, and solid surfaces within the range of 0 ℃ to 800 ℃ in various production processes.  

Main technical specifications of WRK series armored thermocouple
Temperature measurement range and accuracy

category	code name	graduation mark	Outer diameter of casing mm	common temperature ℃	Maximum operating temperature ℃	Allowable deviation △ t
						Temperature measurement range ℃	Tolerance value
Nickel chromium copper nickel	WREK	E	≥ø3	six hundred	seven hundred	0~700	± 2.5 ℃ or ± 0.75% t
Nickel chromium nickel silicon	WRNK	K	≥ø3	eight hundred	nine hundred and fifty	0~900	± 2.5 ℃ or ± 0.75% t
Copper Copper Nickel	WRCK	I	≥ø3	three hundred and fifty	four hundred	＜-200	Regulations on demonstration
						-40—350	± 1 ℃ or ± 0.75% t

Note: 1) t is the absolute value of the measured temperature.
2) T-type indexing products need to be ordered in consultation with the manufacturer.  

Armored thermocouple thermal response time

The time required for the output of the thermocouple to change to 50% of the step change when there is a temperature jump is called the thermal response time T0.5.
The thermal response time of armored thermocouples shall not exceed the specifications in the following table:

Thermal response time T0.5s	Shell type	Insulated type
Diameter of casing (min)
two	zero point four	zero point five
three	zero point six	one point two
four	zero point eight	two point five
five	one point two	four
six	two	six
eight	four	eight

insulation resistance
When the ambient air temperature is 20 ± 15 ℃ and the relative humidity is not greater than 80%, insulation type armor
The insulation resistance value between the thermocouple wire and the outer sleeve should comply with the provisions in the table below.