100 Series Mechanical Compact Pressure Switch, Zinc-Nickel Plated Steel Wetted Materials, BUNA-N Diaphragm, 1 SPST, Normally Open, 1/8 in. NPT Male, 3,000 psig to 6,000 psig 9,000 psig. Switch adjustment ranges from vacuum through 6,000 psi depending on model. Standard Brass with NBR diaphragm wetted parts. SPST creep action switch with Silver-plated contacts. CE compliant to suppress Radio Frequency Interference RFI, Electromagnetic Interference EMI and Electrostatic Discharge ESD.