This is a pressure switch with the model number RT1A. It is designed to operate within a wide range of conditions, making it suitable for various industrial applications. Pressure - related Parameters The adjustment range of the pressure switch is from -0.8 bar (Pe [min]) to 5 bar (Pe [max]), which is equivalent to approximately 23.6 inHg - 72.5 psig. The hysteresis, which is the difference between the pressure at which the switch turns on and off, ranges from 0.5 bar (minimum) to 1.6 bar (maximum), or 7.3 psi - 23.2 psi. The maximum test pressure is 25 bar (Pe), corresponding to 363 psig, and the highest working pressure is 22 bar, equivalent to 320 psig. The pressure connection size is 3/8, with a connection type of "G" and a connection standard of ISO 228 - 1. The pressure connection has a note about using a welded reducing pipe of 6.5/D10mm. The pressure sensing element is a bellows, and the pressure male/female end is external thread. Mechanical and Environmental Parameters The switch has a high - level protection with an IP66 rating for the chassis, which means it is dust - tight and protected against powerful water jets. The 爆破压力 (burst pressure) is 88 bar. It can operate in an environment with a temperature range from -50 °C (the lowest) to 70 °C (the highest), which is -58 °F - 158 °F. Electrical Parameters The electrical connection is made by cable thread connection, with a size of 2xPg 13.5 and an internal thread connection form. The electrical connection standard follows DIN 40430. The electrical specification standard is EN 60947 - 4/-5. For the EN 60947 wiring properties, it supports flexible wires with ferrules (0.2 - 1.5 mm²), flexible wires without ferrules (0.2 - 2.5 mm²), and solid or stranded wires (0.2 - 2.5 mm²). In terms of electrical properties, it has an insulation of 400V, a pollution level of 3, a rated impulse voltage of 4 kV, and short - circuit protection with a 10A fuse. The contact function is SPDT (Single - Pole Double - Throw). 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. The switch is approved by multiple certifications such as CCC, CE, EAC, etc., ensuring its quality and compliance with relevant standards.