This pressure switch is designed for use in ventilation and air conditioning systems to monitor and control airflow in ducts, filters, dampers, and fans. It is suitable for air and other non-flammable, non-aggressive gases. The switch detects small pressure changes and is commonly used for aerator flow control, fan monitoring, and HVAC system regulation. It supports overheating protection and frost protection in industrial refrigeration systems. The set point is visually adjustable. Pressure connection: 6.2 mm internal thread tube or G1/8 (optional). Electrical connection: screw terminals; AMP 6.3 mm and AMP 4.8 mm connectors. Operating temperature range: –30°C to +85°C (maximum overpressure: 5000 Pa). Installation is quick and easy in both vertical and horizontal orientations. Features high adjustment accuracy and long service life with stable operation. Compatible media: air and non-corrosive gases. Pressure range: 20–200 Pa. Accuracy: repeatability < ±1% of full scale. Service life: > 1,000,000 switching cycles. Color: gray. Material: plastic. Dimensions: 81 × 53 mm. Package includes: 1 × micro-differential pressure switch.