United Electric Controls Inc. produces a line of OEM switches including compact cylindrical pressure switches, pressure and differential pressure switches, pressure and temperature switches, and temperature switches. The various switches feature NEMA 1 or 4 enclosures or open frame construction, and adjustable ranges of 4 to 7500 psi, 30" Hg VAC to 90 psi, 30" Hg VAC to 6000 psi, -130 to 650F, or 30" Hg VAC to 300 psi.

Omega Engineering designs OEM pressure switches available with vacuum of 1.5 psi to 500 psi. The switches are UL rated heavy-duty 15 amp SPDT switches that feature process temperature of -35 to 85C, proof pressure of 600 psig, and a 1/4 NPT male pressure port.

Dwyer Instruments Inc. distributes Mercoid-brand low cost OEM pressure switches for industrial applications. Featuring an open case style, the switches are suited for panel mounting applications such as pump skids. The switches also feature a weatherproof enclosure and wetted materials of 316 stainless steel and fluorocarbon.

Gems Sensors & Controls distributes OEM pressure switches for hydraulic applications including forklifts, scissor lifts, and off road equipment. The switches are available with pressures from 15 to 3000 psi.