RS-485 Humidity and Temperature Sensor TSH300

Humidity and Temperature Monitoring RS-485 Teracom TSH300

TSH300 is an RS-485 sensor for humidity and temperature. It's self-powered through the interface, making it perfect for humidity and temperature monitoring. The sensor combines essential components and signal processing for highly accurate digital output.

It's designed for precision monitoring in various applications, including server rooms, offices, and more. TSH300 supports the Modbus RTU protocol, widely used in Building Management Systems (BMS) and Industrial Automation Systems (IAS). Each sensor has a unique serial code for multi-sensor setups on the same RS-485 bus.

With two RJ45 connectors for easy daisy-chaining and the option for 19" cabinet installation, it offers flexibility.


  • 3.0% relative humidity accuracy
  • 12-bit humidity measurement resolution
  • 14-bit temperature measurement resolution
  • Easy 19" cabinet installation
  • Excellent long-term stability
  • Unique 64-Bit serial numbers for sensor identification


  • Temperature and humidity logging for mobile operator facilities, vineyards, greenhouses, etc.
  • Humidity and temperature monitoring in server rooms and data centers
  • Environmental quality monitoring and assessment
  • Humidity and temperature monitoring in building management systems (BMS)

This sensor is compatible with Temperature and humidity data logger TCW210-TH, GSM-GPRS remote IO module TCG140, and third-party MODBUS RTU master devices.

Technical Properties:

  • Physical characteristics
  • Dimensions: 85 x 35.1 x 23.5mm
  • Weight: 40g
  • Environmental limits
  • Operating temperature range: -20 to 60°C
  • Operating relative humidity range: 10 to 90% (non-condensing)
  • Recommended operating range is 20% to 80% RH (non-condensing) over –10°C to 60°C. Prolonged operation beyong
  • these ranges may result in a shift of sensor reading, with slow recovery time.
  • Long term drift typical: ±0.25%RH/year, ±0.05°C /year
  • Higher drift might occur due to contaminant environments with vaporized solvents, adhesives, packaging materials, etc.
  • Storage temperature range: -20 to 60°C
  • Storage relative humidity range: 10 to 90% (non-condensing)
  • Ingress protection: IP20
  • Power requirements
  • Input Voltage: 4.5 to 26VDC (from the bus)
  • Input Current: 5mA@5VDC
  • Humidity measurements
  • Accuracy (min): ±3.0%RH (in 20 to 80%RH range)
  • Accuracy (max): ±5.0%RH (in 10 to 90%RH range)
  • Resolution: 0.1%RH
  • Temperature measurements
  • Accuracy (min): ±0.4°C (in -10 to +60°C range)
  • Accuracy (max): ±0.6°C (in -20 to +60°C range)
  • Resolution: 0.1°C
  • Interface
  • Response time ≤ 50ms
  • Master response time-out ≥ Response time + Answer time.
  • The answer time depends on the number of bits and the baud rate
  • Warranty
  • Warranty period: 3 years