The Setra SRH30011N105SSMAAA is a factory-configured Setra Model SRH300 humidity and temperature transmitter, set up as a duct-mount unit without display, one sensor port, and a 50mm integrated probe. Besides measuring relative humidity and temperature directly, the SRH300 also calculates related values like dew point, absolute humidity, and mixing ratio, so you don’t need a separate calculation step on the controller side.
In actual application, this unit outputs a 4-20mA analog signal, and the housing is rated IP65/NEMA4, so it holds up well in duct runs and mechanical rooms. From our experience, this is the kind of transmitter used in AHU duct monitoring and general HVAC humidity control where the reading is simply fed back to a central controller.
Setra also offers optional configuration accessories (SETRAPCA1 and SETRAPCA3) that let you set custom output scaling or do a one or two point field adjustment of the RH and temperature reading, which is handy if you need to recalibrate on site without sending the unit back.
Before we quote this, we would normally check the duct depth against the 50mm probe length, the accuracy class you need, and whether analog or RS485 (BACnet/Modbus) output suits your system better. Hope this helps.
