HVAC Transmitters

Choose an HVAC transmitter by measurement

• Differential pressure across filters, fans or rooms: the DP Transmitters for AHUs cover clean rooms, filters and general air handling.
• Differential pressure in water circuits: DP Transmitters for Water control pumps and monitor strainers and heat exchangers.
• Fan or duct air volume: the Airflow Transmitters calculate volume flow from differential pressure, paired with the Airflow Probes for an averaged duct reading.
• Confirming fans and ducts deliver design airflow: the Air Velocity Transmitters prove fans and alarm on low airflow.
• Room, duct, pipe or outdoor temperature: the Temperature Transmitters send readings to the BMS for heating, cooling and ventilation control.
• Humidity for comfort or process control: the Humidity Transmitters cover clean rooms, data centres and general buildings.
• Demand-controlled ventilation: the CO2 Sensors adjust fresh air to occupancy to save energy.
• Pollutants beyond CO2: the VOC and Air Quality Sensors pick up gases from materials and activity that CO2 alone misses.

Controllers built into some transmitters

• DPT-Ctrl: part of the DP Transmitters for AHUs range, keeps fans, VAV systems and dampers at a constant pressure or flow.
• RTX-CO2: part of the CO2 Sensors range, has a built-in P/PI controller for spaces without a full BMS.
• Benefit: this can simplify a small installation that doesn't justify a full building management system.

A closing note on outputs: 0 to 10 V is common in building automation, 4 to 20 mA suits long cables, and many Produal models also offer Modbus RTU, so check what your controller accepts before ordering, since getting this wrong at design stage is a common cause of rework on site.