Johnson Controls P67AA-1C Penn Series P67 Low Pressure Control, Opens On Pressure Drop DPST Control, 3-30 psi

Amazon.com Price: $140.00 (as of 05/05/2021 19:23 PST- Details)

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Long-life contact structure, high contact force
Easy-to-adjust settings: single sight-set scales show both cut-in and cut-out settings