Thermistor quotation

NegotiableUpdate on 05/12

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Overview

Shanghai Xuanxu explosion-proof thermistor is usually used in conjunction with display instruments, recording instruments, etc. Directly measure the temperature of liquid, vapor, gas media, and solid surfaces within the range of 0-500 ℃ in the presence of hydrocarbon explosions at the production site.

Product Details

Shangxuan Xuexplosion-proof thermal resistor

1、 Application
Explosion proof thermal resistor WZP-240Usually used in conjunction with display instruments, recording instruments, etc. Directly measuring the presence of hydrocarbons and other explosions at the production site0～500℃The temperature of liquid, vapor, gas media, and solid surfaces within the range.
2、 Characteristics
Pressure spring type temperature sensing element with good anti vibration performance;
Large measurement range;
No need to compensate for wires, saving costs;
Imported thin film resistor components with reliable and stable performance.
3、 Working principle
Explosion proof thermal resistor WZP-240By utilizing the principle of gap explosion-proof, design junction boxes and other components with sufficient strength, and seal all parts that can generate sparks, arcs, and dangerous temperatures inside the junction box cavity. When an explosion occurs inside the cavity, it can be extinguished and cooled through the gap between the joint surfaces, preventing the flame and temperature after the explosion from being transmitted outside the cavity, thus enabling temperature measurement.
4、 Main technical parameters
①Product execution standards
IEC751
JB/T8622－1997
JB/T8623－1997
JB/T5518-91
②Room temperature insulation resistance
Explosion proof thermistor at ambient temperature of15～35℃The relative humidity is not greater than80%The test voltage is10～100V（direct current）Insulation resistance between electrode and outer sleeve≥100MΩ. m.
③Measurement range and tolerance

model	graduation mark	measurement range	accuracy class	allowable deviation
WZP	Pt100	-200～ 500	level	±（0.15 0.002\|t\|）
WZP	Pt100	-200～ 500	Blevel	±（0.30 0.005\|t\|）
WZC	Cu50 Cu100	-50～ 100	-	±（0.30 0.006\|t\|）

Note:tMeasure the temperature value of the temperature sensing element.
④List of Evidence Collection

Explosion proof level	Explosion proof certificate number	certification body
dIIB T4	GYB96451	NEPSI
dIIB T4	GYB96452	NEPSI
dII CT5	GYB98338	NEPSI
dII CT5	GYB97178	NEPSI
iaIICT6	GYB99413	NEPSI

Note:NEPSIExplosion proof certification system * Instrument and Meter Explosion proof Safety Supervision and Inspection Station.

⑤Explosion-proof rating
The explosion-proof level of explosion-proof thermocouples is classified according to their maximum safety clearance for use in explosive gas mixturesATheBTheCLevel three.

category	level	The biggest safety gap in the experiment（MESG）mm
II	A	0.9≤MESG
	B	0.5＜MESG＜0.9
	C	MESG≤0.5

5、 Temperature group
The temperature group of explosion-proof thermocouples is divided according to the maximum allowable surface temperature of their exposed partsT1～T6.

Temperature group	Allow maximum surface temperature
T1	450
T2	300
T3	200
T4	135
T5	100
T6	85

6、 Selection Notice
1）Model number
2）Dividing number
3）Explosion proof grade
4）Accuracy level
5）Installation fixed form
6）Material of protective tube
7）Length or insertion depth
Example: Explosion proof thermistor,Pt100Type, fixed threadM27×2Explosion proof ratingdⅡBT4Grade, protective tube316, insertion depth300mm.WZP-240，Pt100，L=450×300，dⅡBT4Temperature Transmitter0.5Grade, protective tube316, ThreadM27×2.