This is a pressure switch, model RT31S. It has a wide range of application parameters. The maximum test pressure is 25 bar (363 psig), and the maximum operating pressure is 22 bar (320 psig). With an IP66 enclosure protection rating, it can effectively resist dust and water ingress, ensuring reliable operation in harsh environments. The fluid group is 1, and the burst pressure is 88 bar, which shows its high - pressure resistance performance. The ambient temperature range is from - 40 °C (- 40 °F) to 70 °C (158 °F), allowing it to work in a relatively wide temperature range. In terms of electrical specifications, it complies with EN 60947 - 4/-5 standards. The electrical connection is of cable thread type, with a size of 2xPg 13.5 and a female - threaded connection form, following the DIN 40430 standard. The contact function is SPDT. 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 adjustment range of pressure is from 2 bar (29 psig) to 10 bar (145 psig). The hysteresis is 0.3 bar (4.4 psi). For the EN 60947 wiring properties, it supports flexible wires with ferrules from 0.2 - 1.5 mm², flexible wires without ferrules from 0.2 - 2.5 mm², and solid / stranded wires from 0.2 - 2.5 mm². The EN 60947 electrical properties show that it has heat insulation up to 400V, a pollution level of 3, a rated impulse voltage of 4 kV, and short - circuit protection with a 10A fuse. The pressure connection type is G, with a connection size of 1/2 and in accordance with the ISO 228 - 1 standard. The pressure connection is male (external thread), and the pressure sensing element is a bellows. The contact system is repairable. It is cataloged as IV. This pressure switch is a reliable and multi - functional product suitable for various industrial applications.