Square D - 9013FHG44J59X - Schneider Electric/Square D 9013FHG44J59X Non-Adjustable Differential Pressure Switch; 220 psig, 1/4 Inch NPSF, 2 NC, DPST-DB, 575 Volt AC, 20 Amp - Electrical Equipment - Amazon.com
Amazon.com: Danfoss Oil Differential Pressure Switch with Connection Thread ¼ in for HCFC & HFC Refrigerant, Air Conditioning Plants and Refrigerating Systems | Model: MP55 (Range: 0.30 to 4.50 bar) : Industrial & Scientific
Amazon.com: Pressure Switch (Regulation Range: 1.45 to 15.95 psi & Differential Range: 1.015 to 2.32psi) with Pressure Connection 3/8 G | Model: Danfoss RT-112 (with Reducer, Pack of 1) : Industrial & Scientific
Amazon.com: Danfoss Pressure Switch (Range: 1.01 to 2.30 PSI) with Pressure Connection 3/8 G for Air Conditioning System, Heavy Industry, Steam, Liquid, HVAC | Model: RT-112 (Pack of 2) : Industrial & Scientific