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Description
using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and other instruments or systems for monitoring temperature,humidity state quantities.The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and other output methods.
Parameter
Temperature measuring range -30℃~80℃
Temperature measuring accuracy ±0.5℃ @25℃
Humidity measuring range 0~100%RH
Humidity accuracy ±3%RH @25℃
Communication Interface RS485
Default baud rate 9600 8 n 1
Power DC6~24V 1A
Running temperature -40~80°C
Working humidity 5%RH~90%RH
Wiring methods
- Yellow A+ RS485A+
- Blue B- RS485B-
- Green GND Power-
- Red VIN Power+
Tom Roberts
2025-08-06 17:49:03
It connected right up to my USB-to-RS485 interface, and my PC could read it right away using python's pymodbus module. Value agrees with other temperature sensors.
William French
2025-07-21 11:50:12
Excellent product. Very accurate. Only reason that I did not give it 5 stars is that I could not set the baud rate. The documentation about baud rates has errors. Address 66 and 67 are referenced as baud rate. The write register example reads the register. If 9600 baud is fast enough, this product works fine.
Kevin Jackson
2025-07-18 10:10:52
Excellent for price. n = no parity. My PLC only allows 400001 as starting address, where the instructions said 40001. However, when I entered 400001 it did not matter, it gave me the results. Don't forget to divide the numbers by 100 to get the correct temperature and % humidity. Convert from Deg C to Deg F by multiplying by 1.8 and adding 32. I also forgot to hook up the red wire. It works fine with 24 VDC.
Joe
2025-03-05 21:08:09
Exactly what I needed, I had it working in minutes.
Paul Larkin Jr
2025-02-08 17:43:54
Works fine, you just have to poll function code 03 (holding registers) and the transducer I received had slave address 01. Temperature is located at register 1 (address 0) and humidity is register 2 (address 1). IMPORTANT I found that if you poll more than 2 registers in one message, the transducer seems to go into an 'auto broadcast' mode, where it automatically transmitts on a 1-2 second interval. This gave me a bit of a headache.
Michael R. Miller
2025-01-21 18:13:35
Got this working by powering red wire with 24vdc, green ground. Baud rate 9600, 8 data bits, parity none, 1 stop bit, slave node # 1.
Randog
2024-12-06 15:20:26
Had it up and communicating with my laptop in a matter of minutes. It's currently wired up to a Click PLC and giving good results. It gives readings inline with other sensors of the same grade.
Team JAS
2024-11-19 11:56:38
Solid product for the price
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