This is a high - quality pressure switch, model RT31B. It has a wide range of excellent performance parameters for users to choose from. Pressure - related Parameters: The adjustment range of pressure is quite flexible. The adjustment range [bar] Pe is from 2 bar (minimum) to 10 bar (maximum), which is equivalent to 29 psig (minimum) and 145 psig (maximum) in pounds per square inch gauge pressure. The hysteresis is 0.3 bar (4.4 psi), ensuring stable operation. The maximum test pressure [bar] Pe is 25 bar, and in pounds per square inch gauge pressure, it is 363 psig. The highest working pressure is 22 bar (320 psig), which can meet the needs of most working conditions. The pressure connection type is G, with a connection size of 1/2. The pressure connection standard follows ISO 228 - 1, and the pressure connection is male (external thread), and the pressure sensing element is a bellows. Mechanical and Environmental Parameters: The enclosure protection level is IP54, which can effectively prevent dust and splashing water, suitable for various working environments. The fluid group is 1. The bursting pressure is 88 bar, providing a high - level safety guarantee. The environmental temperature range is -40 °C (-40 °F) at the lowest and 70 °C (158 °F) at the highest, making it adaptable to different climates. Electrical Parameters: The electrical specifications comply with EN 60947 - 4/-5 standards. The electrical connection is of cable thread type, with a size of 2xPg 13.5 and a female (internal thread) connection form. The electrical connection standard is DIN 40430. In terms of EN 60947 electrical properties, it has 400V insulation, a pollution level of 3, and a rated impulse voltage of 4 kV. The short - circuit protection is provided by a 10A fuse. The contact function is SPDT, and the contact capacity includes AC15 = 3 A, 400 V; AC1 = 10 A, 400 V; AC3 = 4 A, 400 V; DC13 = 12 W, 220 V; LR = 28 A, 400 V. For EN 60947 wiring properties, it supports flexible wiring with ferrules (0.2 - 1.5 mm²), flexible wiring without ferrules (0.2 - 2.5 mm²), and solid / stranded wires (0.2 - 2.5 mm²). This pressure switch is a reliable choice for various industrial and commercial applications.