... of liquid, gas or vapor not corrosive to copper, steel and alloy, and sends signal or connects control circuit when pressure reaches index ... coupling: M20*1.5, M14*1.5, BSP, NPT, BS and UN available 8. Ambient Temperature: -10~70°C 9. Application ... of liquid, gas or vapor not corrosive to copper, steel and alloy, and sends signal or connects control circuit when pressure reaches index ...