Temperature + Humidity (RH) Combined Sensor
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One sensor. Two readings. Measures both temperature and relative humidity simultaneously.
Most commonly used sensors in BMS — almost every AHU, every room monitoring application, every cold room uses this combined sensor.
Saves one wiring run and one controller input channel compared to using two separate sensors. Also guarantees both readings are taken at the same location at the same moment — important for accurate psychrometric calculations.
Typical Outputs:
Temperature: 4–20mA or 0–10V (one output)
Humidity: 4–20mA or 0–10V (second output)
Both go to separate AI channels on the controllerApplications:
AHU return air duct → Measures both temp and RH of return air
AHU supply air duct → Confirms conditioning result
Room sensor → Monitors occupied space conditions
Outside air sensor → For economiser and fresh air control
Cold room sensor → Monitors storage conditionsRelated Topics
- What is BMS integration? — how a BMS connects with VFDs, energy meters, BACnet/Modbus devices and other building systems
- How to design a BMS system step by step — the complete BMS design methodology covering site survey, IO list, controller selection, sequence of operations
- What is a Building Management System (BMS)? — fundamentals of BMS controls and architecture for HVAC, lighting, energy and access
- What is BMS commissioning? — the disciplined commissioning process that turns a BMS install into a working building brain
- Browse all Sensors topics — more from this section of the EnSmart BMS Library
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