The Elta 149-FPS is a differential pressure switch designed to monitor airflow by detecting pressure variations within duct systems. Operating within a range of 20 to 300Pa, it offers a reliable switching capacity of 1.5A (0.4). Supplied complete with 2 meters of 6mm tubing, two plastic duct adaptors, and mounting screws for easy installation. The unit features IP54-rated protection, ensuring resistance to dust and splashes. This pressure switch is ideal for HVAC systems requiring dependable airflow detection and control.