BELIMO VRU-M1-BAC

In modern HVAC installations—especially in VAV/CAV systems and duct‑pressure control zones—professionals often face challenges of integrating separate sensors, controllers and actuators while managing polluted air environments (dust, fibers, contaminants). The Belimo VRU‑M1‑BAC tackles this by combining a high‑accuracy diaphragm differential‑pressure sensor with a modular controller capable of modulating output, analogue input and full bus communication. This unified solution streamlines installation and reduces the number of discrete components. For example, the unit can be mounted on a VAV box or duct section, measure the pressure differential, control a coupled VST actuator to regulate volume or maintain pressure, and communicate real‑time data back to a building‑automation system via BACnet or Modbus. It’s superior to alternatives because it offers integrated sensing in a harsh environment spec, no need for frequent recalibration (installation‑position independent, no zeroing), and flexibility in control: use analogue 0.5–10 V or fully digital networked control via MP‑Bus/BACnet. It also supports external sensors on S1 input, enabling expanded monitoring. For HVAC integrators looking for a robust, future‑proof VAV/pressure‑control module in installations with contaminated media or high‑precision requirements, the VRU‑M1‑BAC provides a high‑value, professional choice.