The PSF100A-0.5 is a 0.004 to 0.018PSI Pressure Switch with polycarbonate case and 0.187 x 0.02-inch tab-type terminals. This switch is the rugged ultra-sensitive pressure switch incorporates a patented polyurethane diaphragm/SPST-NO contact design offering protection against false actuation due to shock and vibration. Ideal for panel/chassis mounting.