Temperature & relative humidity RS-485 sensor

RHS-1 is a temperature and relative humidity sensor with RS485 interface, designed to work together with RM-408. Depending on the power source, the connection with the sensor is established via 3 or 4-wire RS-485 interface. Power can be supplied from RM-408, or from external power supply if the line is too long (> 50 meters).


  • high-quality, precisely calibrated digital sensor (certificate)
  • measures temperature from -30°C to +70°C
  • measurement resolution 0.1°C, ±0.3°C accuracy
  • measures relative humidity from 0 to 100%
  • measurement resolution 0.1%, ±2% accuracy
  • nonlinearity < 0.1%
  • power supply voltage: DC 4-26V
  • power supply current < 5mA
  • address select via 3 jumpers
  • internal terminal block for connections
  • compact size (71 x 71 x 27 mm)
This sensor uses dedicated 9-bit protocol and can't be use with other modules except RM-408. If you are interested in this product for other purposes, please contact us.


  • buildings automation & HVAC systems
  • remote data logging and monitoring
  • server rooms and racks monitoring
  • weather condition monitoring systems
  • agriculture and livestock breeding
  • chemical industry
  • pharmaceutical industry
  • food industry
  • logistics and warehouses
  • as well many more...

Order now

1 - 10 60 00
11 + 54 00
  All prices include 20% VAT.
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Ethernet thermometer & hygrometer with 8 remote RS-485 sensors and IO
RM-408 is an extended version of TH-355 with added RS-485 interface, to which up to 8 external temperature and humidity sensors RHS-1 can be connected. The device allows individual configuration of each connected sensor and data logging for ~210,000 records of all 9 sensors (1 local and 8 remote).