This pressure switch is mainly used in ventilation and air conditioning systems to control airflow in air ducts, as well as in filters, dampers, and fans. It is suitable for air and other non-flammable, non-aggressive gases. The switch detects small pressure changes and is widely used for airflow control, fan and air conditioning monitoring, overheating protection, and frost protection in industrial refrigeration systems. Its design allows visual adjustment of the set point. Pressure connection: 6.2 mm internal thread tube or G1/8 (optional if hole is present) Electrical connection: screw terminals; AMP 6.3 mm connector; AMP 4.8 mm connector Operating temperature: -30°C to +85°C (overpressure up to 5000 Pa) Installation is quick and easy, both vertically and horizontally High adjustment accuracy Long service life and stable operation Suitable media: air, non-corrosive gases Range: 20–200 Pa Accuracy: Repeatability < ±1% of full scale Service life: > 1,000,000 switching cycles Color: Gray Material: Plastic Size: 81 × 53 mm Package Contents: 1 × differential pressure switch Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.