OTT HydroMet

- Model ADCON TR1 - Combisensor Temperature / Relative Humidity Sensor


The ADCON TR1 was developed in order to offer a highly accurate sensor with excellent long-term stability for a very competitive price. The sensor is virtually maintenance free and provides excellent long-term stability.

A professional radiation shield protects the sensor from direct sunlight and provides sufficient ventilation. Solid UV resistant elements reflect radiation on their white surface, while the black inside absorbs accumulating heat.

A protective coating keeps dust and dirt off the surface of the humidity sensor element to reduce sensor drift, eliminate corrosion and to maintain accuracy over a long period of time. A plastic cap with a metal screen shields both sensing elements against insects, chemicals and all kinds of dirt.

The sensor is delivered completely assembled with its 5-element radiation shield, mast mounting gear for poles with a diameter of ~40mm and a 3m cable with 7-pin Binder connectors for Adcon RTUs.

  • Meteorological and hydrographical weather stations
  • Livestock monitoring
  • Industrial monitoring
  • Storage and silo monitoring


  • Supply Voltage: 4.5 ... 15 VDC
  • Current consumption: < 1,5 mA typ.
  • Operating Temperature:
    • -40°C ... +60°C
    • -40°F ... +140°F
  • Operating Humidity: 0 ... 100% rH
  • Material of radiation shield: PC
  • Mounting material: Aluminum tube, PC brackets, pipe clamps of W4 stainless steel
  • Material of sensor body: Tecapet
  • Protection class: IP65
  • Dimensions:
    • L x W x H 450 x 100 x 170mm
    • L x W x H 17.72 x 3.94 x 6.69 in.
  • Weight: 600g / 1.3 lb.
  • Cable and Connector: 3m cable with male 7-pin M9 Binder
  • Mounting: Mast mounting brackets for 40mm pole, with 2 pipe clamps 32-50mm

Relative Humidity:

  • Measuring Range: 0 ... 100%rH
  • Accuracy at +20°C:
    • ±1% rH from 0 - 90% rH
    • ±2% rH from 90% - max. rH
  • Temperature dependence: ±0.03% rH /°C
  • Long-term stability: <1% rH per year
  • Output signal: 0 ... 2.5 V
  • Sensor element: capacitance, with protective coating (HC01)
  • Temperature:
  • Measuring range:
    • -40°C ... +60°C
    • -40°F ... +140°F
  • Accuracy at +20°C: ±0,1°C
  • Repeatability, Linearity, Temp. Dependence: ±0,1°C
  • Output signal: 0 ... 2.5V DC
  • Sensor element: pt1000 DIN A

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