100 Series Mechanical Compact Pressure Switch, Zinc-Nickel Plated Steel Wetted Materials, BUNA-N Diaphragm, 1 SPST, Normally Open, 1/8 in. NPT Male, 300 psig to 2,500 psig 9,000 psig, Spade Terminals 1/4 x 1/32. 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.