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HTemp-485 Box2

Combined temperature and humidity sensor for vertical wall mounting indoor usage. Communication over RS-485 bus with a simple communication protocol. The sensor can be used separately but it was designed to be connected with the Poseidon family units.

HTemp-485 Box2 measures temperature and humidity, communicates over 4-wire bus and up to 26 sensors can be connected parallely to a single bus. The sensor is intended for indoor vertical wall mounting.

The busbar uses 4 wires, two with a standard RS-485 line, the other two are used for sensors' power supply. The individual sensors can be powered by an external power source and can be connected by just two RS-485 line wires. RS-485 communication line works up to 1000m distance.

For temperature measuring the thermal sensor uses an integrated element with accuracy of ±0.5°C, humidity is as well measured by an internal sensor with accuracy ±4%.


  • Extensive measuring systems with many measuring points
  • Air-conditioning state measuring and measuring of living conditions in intelligent buildings
  • Independent measuring in food warehouses and agricultural crops storage buildings
  • Grocery storehouses and premises 
  • Temperature and humidity monitoring in pharmaceutical storages
  • Measuring in residential premises
  • Industrial measuring and regulation
  • After connection to the Poseidon model 1250 or 2251 – temperature values transmission over Ethernet or Internet
  • After connection to the Poseidon model 2251 – logging possibility of up to 100 000 values into internal Flash memory


PDF icon HTemp-485_Box2_FL_en.pdf233.54 KB
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