Product Details

Product Description

BBZ WRR-120 Assembly type thermocouple sensor for liquid vapor

gas and the surface of solid

Product Application

BBZ WRR-120 Assembly type Assembly type waterproof thermocouple temperature sensor can measure the temperature of liquid, vapor, gas and the surface of solid from 0℃ to 1800℃ directly in many production process.

Specifications

Category	Mode	Graduation	Range	Allowable error(△t℃)
Platinum rhodium 30－Platinum rhodium 6	WRR	B	0-1800	±1.5℃ or ±0.0025∣t∣
Platinum rhodium10－platinum	WRP	S	0-1600	±1.5℃ or ±0.0025∣t∣
Nickel chromium triangle－nisiloy	WRN	K	0-1300	±2.5℃ or ±0.0075∣t∣
Nickel chromium triangle－copper nickel	WRE	E	0-800	±2.5℃ or ±0.0075∣t∣

Models

W	Temperature meter
R	Thermocouple
thermocouple material	R）platinum rhodium30－platinum rhodium 6
	P）platinum rhodium 10－platinum
	N）nickel chromium－nisiloy
	E）nickel chromium－copper nickel
install and fixed type	1）non-fixed molded type
	2）fixed screw type
	3）movable flange
	4）fixed flange type
	5）movable flange square type
	6）fixed screw protect tube type
junction box type	2）splash proof type
	3）waterproof type
	4）explosion suppression type
design series number	0）ø16mm protecting tube
	1）ø25mm protecting tube（double tubes）
	2）ø16mm high aluminum tube（single tube）
	3）ø20mm high aluminum tube

Upper and lower limits of thermocouple and insulating resistance

Upper temperature limit(tm℃)	Test temperature(T℃ )	Resistance(MΩ)
100≤tm＜300	t=tm	10
300≤tm＜500	t=tm	2
500≤tm＜850	t=tm	0.5
850≤tm＜1000	t=tm	0.08
1000≤tm＜1300	t=tm	0.02
tm＞1300	t=1300	0.02

Description

As the sensor of temperature measurement, the industrial BBZ WRR-120 assembly type thermocouple sensor is usually used with display instrument, recorders and electrical controller.

Principle
Two ends of different component conductors welded to form a loop, direct temperature measuring end called measuring end, terminal end called reference end. When measuring and reference end have temperature difference, it will generate heat current in the loop, connected to the display meter, the meter will indicate temperature value corresponding to thermo emf generated by the thermocouple.

Thermal emf of thermocouple will grow as the temperature rises at measuring end, the thermal emf only relates to thermocouple conductor material and temperature difference between the two ends, and have no relation to the heated electrode length and diameter.

The basic structure of assembly-type thermocouple is mainly composed of the junction box, protection tube, insulation casing, terminals, and heated electrode with a variety of mounting fixture components.

Packing & Delivery

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