Dwyer Instruments 1900-1MR Pressure Switch 323613-751 whereas earlier "KT" designations often
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Dwyer Instruments 1900 1MR Pressure Switch 323613 751 whereas earlier "KT" designations often whereas earlier "KT" designations often referred to the head and gasket only without the full casting assembly 1) while maintaining a safe operating pressure range of 0 to 300 PSI