This pressure switch is mainly used in ventilation and conditioning systems to control the in the ducts, as as in filters, ailerons and fans. They are suitable for and other non- and non-aggressive gases. This switch is capable of a small change of pressure and widely used to control aerator , to monitor and fan and conditioning. It is also suitable for protection against overheating and frost protection in the industrial refrigeration system. Due to exceptional design, the set can be adjusted visually Pressure connection: 6.2mm Internal thread tube or G1 / 8 (optional if the hole) Electrical connection: screw terminals AMP6.3mm connector; AMP4.8mm connector Operating temperature: -30Celsius 85Celsius (overpressure 5000 Pa) p Installation is quick and easy, both vertical and horizontal p extremely high adjustment accuracy p long life and stable operation Suitable for medium: , non- gas. Range: 50~500Pa Accuracy : Repeatability Less than +/- 1% full scale; Service life : Greater than 106 switching cycles size: 81 x 53mm Material: plastic colour: Package Contents: 2 x - differential pressure switch Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.