SDC-H1 - Duct Mounted


Relative humidity transmitter for duct mounting with voltage or current output

The SDC-H1 measures relative humidity with a unique capacitive sensor element. The applied measuring technology guarantees excellent reliability and long term stability. Using a display and programming accessory, the user has the option to read out and reset minimum and maximum values.


  • Humidity measurement for supply and return air ducts in heating, ventilation and air conditioning applications
  • Recording of minimum and maximum values for critical environments
  • Supervision of critical humidity


  • Replaceable sensor element
  • With AES4-Sensing elements: High humidity-anti-creep and reconditioning functionality
  • Humidity measurement for air ducts
  • Minimum and maximum value memory
  • 0...10 V, 0...20 mA or 2...10 V. 4...20 mA measuring signals selectable with jumpers
  • Optional alternative signal ranges programmable
  • Selectable averaging signal
  • Optional LCD display (OPC-S) or external display (OPA-S)
  • Status LED


 Item name  Item code   Description  Length
 SDC-H1-08-A3-1  40-300146


  Transmitter for duct mounting,
  incl. cable gland AMC-1 and humidity 
  sensor element AES1-HT-A3


  8 cm

 SDC-H1-16-A3-1  40-300147  16 cm


OPC-S - Built-in Display
Operation and display for intelligent duct and outdoor transmitters
OPA-S - Remote Display
Operation and display for intelligent transmitters
AES3-HT / AES4-HT - Humidity/Temperature Sensor
For indoor, outdoor and duct transmitters and PI-universal controls
AMC-1 - Cable Gland
For indoor, outdoor and duct transmitters
AMC-2 - Conduit Connector
For indoor, outdoor and duct transmitters
AMS-1 - Wheather Shield
For outdoor or duct transmitters
AMF - Duct Mounting Flange
Duct mounting flanges


Operation Manual

Install Sheet

Application Notes