MERCOID Pressure Switch: 30 to 500 psi, 12 to 45 psi, 1-Port 1/4 in FNPT, SPDT, 15A @ 125/250/480 V, 4X - 2HMA5|SA1113E-A4-K1 - Grainger
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Amazon.com: Dwyer Mercoid Series DA Brass Bourdon Tube Pressure Switch, 1/8-15 psig, 6 psig Minimum Deadband, Snap Switch, SPDT : Industrial & Scientific
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USABlueBook - Mercoid® Snap-Action Pressure Switch‚ SS‚ 10-200 psig‚ Weatherproof
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