Product Description 604 Series Differential Pressure Switch: Fan Differential Pressure Switch, Air Conditioning Switch, Differential Pressure Sensor Performance Enhancement: The 604 Series differential pressure switch is designed to provide optimal performance for fan and air conditioning systems, ensuring reliable operation and stable airflow. Precise Monitoring: With advanced differential pressure sensor technology, the 604 Series accurately measures air pressure differences, helping to maintain the efficiency of HVAC systems. Rugged and Durable: The 604 Series differential pressure switch is made of rugged and durable materials, able to withstand harsh environments, ensuring a long service life and reliable performance in a variety of applications. Easy Installation: The 604 Series' user-friendly design makes installation simple, allowing for quick integration into existing fan and air conditioning systems without complex modifications. Wide Application: The 604 Series differential pressure switch is suitable for a wide range of applications and is ideal for monitoring HVAC system pressure, ensuring your air conditioning operates at peak efficiency, thereby improving comfort and saving energy. Color: As shown in the picture. Material: Plastic + Metal. Package Contents: 1 * Pneumatic Switch 1 * Accessory Pack