BELIMO 01APS-10U

In HVAC systems—particularly in air handling units, filter banks or fan pressure circuits—maintaining correct pressure differentials is key to efficiency, safety and air quality. The BELIMO 01APS‑10U differential pressure switch addresses this by monitoring pressures between 50 and 500 Pa, switching its output contact when the set‑point is exceeded. Its simple on/off switch output allows integration into control panels or BMS logic to alert when filters are clogged, fans underperform or ductwork is obstructed. The unit comes with pitot tubes and a 2‑m PVC hose, making installation into ducts straightforward and reducing the time and complexity of setup. With an IP54‑rated housing and automatic reset, the device also helps reduce maintenance efforts and downtime. Compared to generic pressure switches, the 01APS‑10U offers a wide monitoring range (50–500 Pa), proven reliability in HVAC environments, and a brand quality that ensures consistent performance—especially important where airflow disruption or fan failure could lead to comfort, energy or safety issues. Whether used for filter monitoring, fan status, duct pressure cascades or ensuring ventilation systems are balanced, this pressure switch offers a cost‑effective, dependable solution for professionals needing simple but effective pressure control in ventilation applications.