Category
Humidity Transmitters for HVAC and BMS
Control humidity in buildings, clean rooms and data centres with Produal humidity transmitters for BMS.
In buildings, humidity is controlled through the HVAC system: humidifiers, dehumidifiers, cooling coils and ventilation rates, and a humidity transmitter hvac engineers can trust gives the BMS the readings it needs to do that well. Produal room, duct and outdoor models supply clean rooms, data centres, hospitals and general building control.
5 Products · Humidity Transmitters
Selection guide
Humidity Transmitters for HVAC and BMS Guide
How HVAC humidity control works
The BMS continuously compares the transmitter's reading with a setpoint and adjusts the humidifier, dehumidifier or ventilation rate to close the gap. Outdoor humidity and temperature readings let it anticipate how much moisture incoming fresh air will add, rather than only reacting after conditions inside have already drifted noticeably, which gives smoother control and fewer swings around the setpoint.
Where humidity control matters most
- Clean rooms and pharma: strict humidity limits protect product quality and process consistency.
- Data centres: avoiding static when it's too dry and condensation on equipment when it's too humid.
- Hospitals, museums and archives: protecting people and sensitive materials from swings in moisture.
- Swimming pools and spas: controlling condensation and corrosion in a constantly humid space, where standard electronics would corrode quickly.
- Offices and general buildings: keeping occupants comfortable and limiting static shocks and dust in winter.
Produal transmitters for BMS
- Models: room (KLH, RTX-RH, RTX-D-RH), duct (KLK) and outdoor (KLU 100) models are all available, and every one also measures temperature, so the BMS gets both readings from a single device rather than fitting two separate sensors at each point.
- Full specifications: see Temperature and Humidity Transmitters for the model-by-model list.
FAQ
Common questions
Should I use a room or a duct humidity sensor for HVAC?
A room sensor controls each space individually, which suits offices, clean rooms or areas with different humidity needs. A duct sensor in the return air gives one average reading for the whole zone an air handling unit serves, which is simpler where individual room control isn't needed.
Why do I need an outdoor humidity sensor on a BMS?
Outdoor humidity and temperature let the BMS anticipate how much moisture incoming fresh air will add and decide how much outside air to use or when to dehumidify, rather than only reacting once conditions indoors have already drifted. This can save energy compared with reacting alone.
What humidity range suits a clean room or data centre?
Clean rooms and data centres typically hold a tight relative humidity band set by the process or equipment manufacturer, often with alarms on either side. Tell us your target range and application and we'll confirm which Produal transmitter and accuracy suits it.
Do HVAC humidity transmitters also measure temperature?
Yes. All the Produal humidity transmitters on this page, whether room, duct or outdoor, measure temperature as well as relative humidity, so the BMS gets both readings from one device and one installation.
Which model suits a swimming pool plant room?
The Produal KLU 100 is built for demanding conditions including spas and indoor swimming pools, where constant high humidity would shorten the life of a standard transmitter. Its longer probe also keeps the sensor away from heat given off by its own electronics.
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