1-Wire Temperature and Humidity Sensor TSM400-1-TH

1-Wire Temperature and Humidity Accuracy

TSM400-1-TH is a digital temperature and humidity sensor featuring a 1-Wire interface. Designed for wall mounting, it's well-suited for monitoring server rooms, data centers, offices, stores, and more.

This sensor integrates essential components and signal processing to deliver highly accurate digital output, eliminating the need for recalibration. It operates on a 1-Wire bus, and each unit boasts a unique 64-bit serial code, enabling support for multiple sensors on the same bus.

Housed in a slim plastic enclosure, the bottom part is designed for installation on standard flush-mounted or cavity wall boxes with a diameter of 68mm and installation openings spaced 61mm apart.

Maintaining humidity levels is crucial for creating a healthy environment in various settings, including offices, workplaces, schools, and public buildings.


  • Communication status is displayed through an LED indicator
  • Provides outstanding long-term stability
  • Designed for easy wall mounting
  • Supports firmware updates via the interface
  • Operates with low current consumption
  • Unique 64-Bit serial number for multi-sensor compatibility


  • ssessing and monitoring environmental quality in office spaces
  • Monitoring humidity and temperature in server rooms and data centers
  • Utilized in indoor air quality systems
  • Monitoring humidity and temperature as part of building management systems (BMS)

1-Wire temperature and humidity sensor can be used with
Temperature and humidity data logger TCW210-TH
Ethernet IO moduleTCW241
Remote IO moduleTCW122B-CM
Ethernet data loggerTCW220
4G LTE universal IO moduleTCG140-4
4G LTE wireless IO moduleTCG120-4

Technical Properties:

  • Physical characteristics
  • Dimensions: 81 x 81 x 30 mm
  • Weight: 66 g
  • Environmental limits
  • Operating temperature range: -20 to 60°C
  • Operating relative humidity range: 10 to 90% (non-condensing) *
  • Long term drift typical: ±0.25 %RH/year, ±0.05 °C /year **
  • Storage temperature range: -20 to 60°C
  • Storage relative humidity range: 10 to 90% (non-condensing)
  • Ingress protection: IP20
  • Power requirements
  • Operating voltage range (including -15/+20% according to IEC 62368-1): 4.5 to 26 VDC
  • Current consumption: 10 mA@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
  • Warranty
  • Warranty period: 3 years
    * Recommended operating range is 20% to 80% RH (non-condensing) over –10 °C to 60 °C
    Prolonged operation beyond these ranges may result in a shift of sensor reading, with slow recovery time.
    ** Higher drift values might occur due to contaminant environments with vaporized solvents, out-gassing tapes, adhesives,
    packaging materials, etc.