PD series pressure difference swicthes are housed in pressure diecast aluminium powder coated enclosure and recommended for panel mounting or outdoor service based on the type of enclosure opted for. The repeat accuracy is better than +/- 1% FSR.A 3/8" cable entry is provided for cables and a terminal strip suitable fro wired ends is provided inside the enclosure. Pressure ports are 1/4" BSPF standard.