This general purpose pressure switch has received high reputation for reliability and durability. For heating and cooling, air conditioning and various industrial equipment. Standard accessories: 1/4 flare nut, main unit mounting plate (SNS-AE01), 4 M4 x 8 screws with spring washers. Specifications: Max operating pressure: Low pressure side 1.5 MPa / High pressure side 3.3 MPa Airtight test pressure: Low pressure side 1.65 MPa High pressure side 4 MPa Fluid temperature: -4 MPa 20-70 °C Adjustment Range (MPa) : Low Pressure Side -0.06 - 0.6 / High Pressure Side 0.8 - 3