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Duct, Humidity, Temperature

Duct humidity sensor for measuring relative humidity and temperature in gaseous mediums of heating, ventilation and air-conditioning systems (e.g. supply air/ exhaust air ducts). At option, an additional passive temperature sensor is available. Designed for connection to display and control systems.


2x 0-10V or 2x 4-20mA

Measuring range

  • Humidity: 0...100% rh
  • Temperature: -20°C...+80°C

Accuracy humidity

±3% between 20...80% rh

Power supply

  • 0-10V: 15-24V DC (±10%) or 24V AC (±10%)
  • 4-20mA: 15-24V DC (±10%)

Mounting lengths

  • 140 mm
  • 270 mm
  • 400 mm


At option with additional passive temperature sensor

Download the specification in Pdf format here     Download

LCN-FTK-AA - Duct sensor for relative humidity and temperature