The WTR20 series of miniature temperature transmitters are compact thermometers that integrate temperature sensors. They linearize the sensor signals and output a 4...20mA (2-wire) DC current standard signal that is linearly proportional to the temperature. They can also directly output RTD signals. With diverse output options, they can meet various requirements.
The WTR20 series of miniature temperature transmitters feature a cylindrical stainless steel housing connected to a compact temperature sensor body, presenting a simple and space-saving design solution. Due to their small size and high measurement accuracy, they are widely used in equipment matching fields.
The WTR20 series of miniature temperature transmitters are equipped with a circuit design that is both lightning-proof and resistant to rapid transient interference. They have a lightning protection function, with the lightning protection index reaching 4000V for induced lightning, and the equipment remains undamaged after five consecutive strikes. At the same time, they are capable of withstanding rapid transient (burst) interference of 4000V. This product can effectively prevent damage caused by induced lightning or the startup and shutdown of large power equipment within the power supply system, the operation of variable frequency equipment, and the use of welding machines during on-site construction.
Heating, ventilation, air conditioning, water conservancy, power and other engineering projects
Agriculture, room temperature, environmental engineering, food, pharmaceutical equipment supporting machinery manufacturing, compressors, hydraulic equipment, etc.
| Temperature range | Absence of cervical :-50℃~250℃ |
| Measuring element | Pt100, Cu50, Pt10 |
| Tolerance values of measuring elements | ■Grade B ■Grade A |
| Measurement accuracy | ≤ 0.2℃ ≤ 0.2 degrees Celsius |
| Repeatability | 0.1% |
| Output signal | 4...20mA, 2-wire system |
| Maximum load | RA ≤ (UB - 9V) / 0.025A |
| Polarity protection | There is |
| Fault protection | Short-circuit protection output ≤ 3.5 mA Open circuit protection output ≥ 23mA |
| power supply | 9...30VDC |
| Response time | ≤250ms |
| Lightning protection | ±4000V (5 times) |
| Anti-pulse group | ±4000V |
| Anti-RF interference | >10V/m(80MHz...1000MHz) |
| Temperature drift | 0.008%FS/℃ |
| Long-term stability | ≤ 0.1℃ per year |
| Electrical connection | ■ Standard Type A DIN HARTING connector ■ M12×1 Circular Aviation Plug Connector ■ BZ Type Junction Box |
| Ambient temperature and storage temperature | -40℃~85℃ Pt-100 output type -40℃ to 120℃ |
| Degree of protection | IP67 is applicable to circular M12×1 aviation plugs. IP 65 is applicable to Hirschmann connectors and BZ junction boxes. |
| Materials | stainless steel |
| Seismic resistance | 3g (IEC 60751, standard) |
Regional ManagerManager Peng
Contact number86-18030837175
Regional ManagerManager Zeng
Contact number86-18520508508
Regional ManagerManager Jiang
Contact number86-13324545911
Regional ManagerManager Gao
Contact number86-13871508295
Regional ManagerManager Yuan
Contact number86-13711120640
