The integrated temperature transmitter is usually used with display instruments, recording instruments and electronic computers. It outputs a 4 to 20 mA signal and directly measures the temperatures of liquid, steam and gas media and solid surfaces in the range of -200 to 1300°C at production sites containing carbon and nitrogen compounds and other explosives. The thermoelectric potential or resistance generated by a thermocouple or thermal resistor produces an unbalanced signal through the transmitter bridge; after amplification, it is converted into a 4 to 20 mA DC signal.
- Temperature measurement of liquid, steam and gas media at production sites containing carbon and nitrogen compounds and other explosives.
- Solid surface temperature measurement.
- Applications that require a temperature signal to be sent to display instruments, recording instruments or electronic computers.
- Two-wire 4 to 20 mA output with strong anti-interference ability.
- Saves the cost of compensation wire and temperature-transmitter installation.
- Cold-end temperature automatic compensation and a non-linear correction circuit.
- Liquid-crystal or digital-tube display available.
- Protection grade: IP66.
- Available with fixed thread, fixed flange, fixed thread cone type, straight tube fitting type, fixed thread tube fitting type and adjustable thread tube fitting type.
- The structure drawings show threaded, flanged and sleeved installation constructions.
- Explosion-proof junction box with optional display.
| Item |
Parameter |
| Applicable standards |
TB/T7391, GB/T30121, GB/T30429 |
| Accuracy level |
±0.2%FS, ±0.5%FS |
| Output signal |
Analog 4 to 20 mA (2-wire) / 4 to 20 mA (2-wire) + HART |
| Output method |
2-wire |
| Power supply |
18 to 36 V DC |
| Protection grade |
IP66 |
| Insulation resistance |
Not less than 50 MΩ between instrument output terminals and shell |
| Display mode |
Liquid crystal or digital tube |
| Ambient temperature |
-40 to 85°C |
| Model |
Graduation |
Class I tolerance and temperature measurement range |
Class II tolerance and temperature measurement range |
| WRN |
K |
±1.5°C: -40 to 375°C; ±0.004｜t｜: 375 to 1000°C |
±2.5°C: -40 to 333°C; ±0.0075｜t｜: 333 to 1200°C |
| WRM |
N |
±1.5°C: -40 to 375°C; ±0.004｜t｜: 375 to 1000°C |
±2.5°C: -40 to 333°C; ±0.0075｜t｜: 333 to 1200°C |
| WRE |
E |
±1.5°C: -40 to 375°C; ±0.004｜t｜: 375 to 800°C |
±2.5°C: -40 to 333°C; ±0.0075｜t｜: 333 to 900°C |
| WRF |
J |
±1.5°C: -40 to 375°C; ±0.004｜t｜: 375 to 750°C |
±2.5°C: -40 to 333°C; ±0.0075｜t｜: 333 to 750°C |
| WRC |
T |
±0.5°C: -40 to 125°C; ±0.004｜t｜: 125 to 350°C |
±1.0°C: -40 to 133°C; ±0.0075｜t｜: 133 to 350°C |
| Model |
Graduation |
Temperature measurement range |
Accuracy level |
Tolerance value |
| WZP |
Pt100 |
-200 to 500°C |
Class A |
±(0.15+0.002｜t｜) |
| WZP |
Pt100 |
-200 to 500°C |
Class B |
±(0.30+0.005｜t｜) |
| WZC |
Cu50, Cu100 |
-50 to 100°C |
/ |
±(0.30+0.006｜t｜) |
| Product type |
Explosion-proof marking |
Certificate authority |
| Integrated temperature transmitter (thermocouple) |
Ex db IIC T4…T6 Gb / Ex tb IIIC T80°C…T130°C Db |
NEPSI |
| Integrated temperature transmitter (thermocouple) |
Ex ia IIC T4…T6 Ga / Ex ia IIIC T200135°C Da |
NEPSI |
| Integrated temperature transmitter (thermal resistor) |
Ex db IIC T4…T6 Gb / Ex tb IIIC T80°C…T130°C Db |
NEPSI |
| Integrated temperature transmitter (thermal resistor) |
Ex ia IIC T4…T6 Ga / Ex ia IIIC T200135°C Da |
NEPSI |
| Item |
Options |
| Input type |
Thermocouple, thermal resistor |
| Temperature-sensing element |
Pt100, Cu50/Cu100, K, N, E, J, T, S, R, B |
| Sensor form |
Armored, assembly |
| Transmitter |
Temperature transmitter (B) |
| Coupling wire pairs |
Single branch, double branch |
| Installation form |
Fixed thread, fixed flange, fixed thread cone type, straight tube fitting type, fixed thread tube fitting type, adjustable thread tube fitting type |
| Junction box |
Explosion-proof type |
| Protective tube diameter |
Φ16, Φ20, Φ2, Φ3, Φ4, Φ5, Φ6, Φ8, or blank |
| Display |
Display available or blank |
| Sleeve form |
See attachment |
- WZPB-240S / WZPB-241S
- WZPB-440S / WZPB-441S
- WZPB-74S
- WZPB-84S
- WZPB-74S-TH02B
- WZPB-74S-TH03H
- Input sensor type, graduation, accuracy level and single- or double-element requirement.
- Measured medium, temperature range, operating pressure and installation location.
- Required output signal (4 to 20 mA or 4 to 20 mA + HART), power supply and display requirement.
- Explosion-proof type, gas or dust group, temperature group and required certification for the hazardous area.
- Installation method, protective-tube diameter, sleeve form, overall length L and insertion depth I.
- Display instruments, recording instruments and electronic computers: this product is usually used with these products.