Air Temperature Humidity Transmitter Sensor

♦ Long term stability and full range temperature compensation

♦The working temperature range is wide (- 40 ℃ ~ 85 ℃)

♦Multi parameter selection of temperature range

♦Easy to install, wall mounted, rail mounted,high level of dust protection (IP65)

♦LCD display (optional) and self replaceable probe

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RS485 4-20mA temperature and humidity sensor

The temperature and humidity transmitteradopts high precision temperature humidity integrated chip.  The temperature is measured by using diode temperature sensing p-n junction, and the forward step-down changes with temperature under constant current.  Humidity is measured by humidity sensitive capacitance, which changes with the change of humidity.  The temperature and humidity are compensated for each other, and then amplified into standard digital or analog signals of relative humidity and temperature through amplification circuit.

Technical Specification


          With display

      Without display

Measuring medium

gas (compatible with contact material)

Overall material

ABS engineering plastic for main shell

Filter (contact)

polyethylene (density 50 μ m)

Cable locking head nylon

locking wire diameter 5-8mm)


 LCD with backlight

Temperature range

- 40 ~ 0 ~ 125 ℃ (Note 1)

Humidity range

 0-100% RH (relative humidity)

Supply voltage

24VDC (current / voltage output) 12-24vdc (RS485 output)

Output signal:

RS485, 4-20mA, 0-10vdc

Response frequency

 ≤ 2Hz

Response speed

10 ℃ for temperature and 10% RH for humidity, The gas flow rate is 0.1m/s.

Working conditions

ambient temperature - 40 ~ 85 ℃

 Ambient humidity

5% - 95% RH


± 1% RH FS / year ± 0.2 ℃ / year

Seismic performance

5g (20... 2000Hz)

Overall weight

≈ 160g

≈ 138g

Protection grade

Protection grade

Power range(US = supply voltage)

Current mode  ≤0.05Us(W)

Digital type  ≤0.015Us(W)

Voltage type  ≤0.015Us(W)




Load characteristics

current type load ≤ {(us-12) ÷ 0.02 (US = supply voltage)} Ω

Voltage type load

≥ 100k Ω


Product Display


 temperature humidity transmitter with RS485

second temperature humidity transmitter picture

three  temperature humidity transmitter

four temperature humidity transmitter with RS485



Can I get some samples?

Yes, Sample order is available for quality check and market test. But you have to pay the express cost.


What's delivery time?

It usually takes about 3-5 working days for small order and 10-15 days for big order.


How to solve the quality problems after sales?

Take photos or videos of the problems and send to us.

We will make a satisfied solution for you within 24 hours after we confirm the problems.



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For any request of information or technical support, fill in the form. All fields marked with an asterisk* are required.

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For any request of information or technical support, fill in the form. All fields marked with an asterisk* are required.