WZPB integrated explosion-proof thermistor

NegotiableUpdate on 05/18

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Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The change in thermoelectric potential (resistance) measured by the WZPB integrated explosion-proof thermistor in working condition generates an unbalanced signal through the bridge of the temperature transmitter, which is amplified and converted into a 4-20mA electrical signal to the working instrument. The working instrument then displays the corresponding temperature value. The temperature instrument manufacturer, temperature, pressure, liquid level, flow rate, and material level supplier provide the complete set.

Product Details

WZPB integrated explosion-proof thermistorAfter sales service commitment:

If users encounter any problems while using the products provided by our company, they can receive support and assistance. Users can primarily communicate with our company's customer service center. Once a user's request is received, professional engineers from the customer service department will solve or answer the questions raised by the user within the specified time. In addition, our company has 24-hour after-sales service to ensure a response within 24 hours after receiving user notifications. For those that require personnel to handle, the company will dispatch service personnel to the scene within a reasonable time to ensure that the equipment can resume normal operation as soon as possible.

Our company's service tenet:

The company adheres to the principle of "serving customers, being responsible for customers, and satisfying customers", conscientiously implements the requirements of ISO9001 quality system standards, and continuously improves the product and service quality of the enterprise.

WZPB integrated explosion-proof thermistorworking principle
The change in thermoelectric potential (resistance) measured by a thermocouple (resistor) in working state generates an unbalanced signal through the bridge of the temperature transmitter, which is amplified and converted into a 4-20mA electrical signal to the working instrument. The working instrument then displays the corresponding temperature value.
Explosion proof thermocouple (resistor) utilizes the principle of gap explosion-proof. When an explosion occurs inside the chamber, it can extinguish and cool through the gap between the joint surfaces, preventing the flame and temperature after the explosion from being transmitted outside the chamber, thus enabling temperature measurement. The thermoelectric potential (resistance value) generated by the thermocouple (resistor) is amplified by the temperature transmitter's bridge to generate an unbalanced signal, which is then converted into a 4-20mA DC electrical signal and sent to the worker's instrument. The working instrument displays the corresponding temperature value.
Main technical parameters
Product execution standards
IEC584
IEC751
IEC1515
JB/T5518-91
JB/T7391-94
Measurement range and tolerance
1) Temperature measurement range and tolerance of thermistor
Model division number, temperature measurement range, ℃, accuracy level, allowable deviation
WZPB Pt100 -200-+500 * B 级 ±（0.15+0.002ItI）
±（ 0.30 + 0.005 ITI ）
WZCB Cu50 Cu100 -50-+100 　 ±（0.30+0.005 ItI）
2) Thermocouple temperature measurement range and tolerance
Model division number, tolerance level, tolerance temperature range, ℃ tolerance temperature range
WRNB K ±1.5℃ -40-375 ±2.5℃ -40-333
± 0.004 ITI 375 - 1000 0.0075 ITI 333
WRMB N ±1.5℃ -40-375 ±2.5℃ -40-333
± 0.004 ITI 375 - 1000 0.0075 ITI 333
WREB E ±1.5℃ -40-375 ±1.5℃ -40-333
± 0.004 ITI 375 - 800 0.004 ITI 333
WRFB J ±1.5℃ -40-375 ±1.5℃ -40-333
± 0.004 ITI 375 - 750 0.004 ITI 333
WRCB T ±1.5℃ -40-125 ±1℃ -40-133
± 0.004 ITI 125 - 350 0.0075 ITI 133

Output signal: 4-20 mA, load resistance 250, transmission wire resistance 100
Output method: Two line system
Accuracy level:
Temperature transmitter accuracy level: 0.1 0.2 0.5
Display accuracy level: Analog indicator 2.5 level; Digital display level 0.5

Power supply: 24V DC ± 10 ℅
Protection level: IP65
Explosion proof grade:
Explosion proof type: d Ⅱ BT4 d Ⅱ CT5 d Ⅱ CT6
Intrinsic safety type: ia Ⅱ CT6
Insulation resistance: The insulation resistance between the instrument output terminal and the housing should not be less than 50
Thermal response time:
When there is a step change in temperature, the time required for the current output signal of the instrument to change to 50% of the step change is usually represented by t0.5. When the step response stabilization time of the temperature transmitter does not exceed one-fifth of the thermocouple (resistance) thermal response stabilization time t0.5, the thermocouple (resistance) thermal response time is used as the thermal response time of the instrument; When the step thermal response stability time of the temperature transmitter does not exceed half of the thermocouple (resistance) thermal response stability time t0.5, the thermal response time of the temperature transmitter is used as the thermal response time of the instrument;
Basic error:
The basic error of the instrument should not exceed the combined error of the basic errors of the thermocouple (resistor) and temperature transmitter.