This pressure switch is designed for use in ventilation and air conditioning systems to monitor and control airflow in ducts, as well as in filters, dampers, and fans. It is suitable for use with air and other non-corrosive, non-aggressive gases. The switch detects small pressure changes and is widely used for controlling air flow, monitoring fans, and HVAC applications. It can also be used for overheat protection and frost protection in industrial refrigeration systems. The adjustable set point allows for visual calibration due to its design. Pressure connection: 6.2mm internal thread tube or G1/8 (optional depending on hole) Electrical connection: Screw terminals with AMP6.3mm connector; AMP4.8mm connector Operating temperature: -30°C to 85°C (with overpressure up to 5000 Pa) Installation: Suitable for both vertical and horizontal mounting High adjustment accuracy Stable operation Suitable media: Air, non-corrosive gases Range: 20-200 Pa Accuracy: Repeatability over 106 switching cycles Color: Gray Material: Plastic Size: 81 x 53 mm Package Contents: 1 x Differential pressure switch Note: Light and display differences may cause slight color variations between the product image and actual item. Measurement error allowance is +/- 1-3 cm.