Double Diaphragm Pressure Switch Home Shop Parts Product Specific Parts Mirage Spare Parts Double Diaphragm Pressure Switch Sorry! This product is currently not available for sale Register your interest Receive email notification when this item becomes available. Email Address: Double diaphragm construction to meet double insulation requirements and water presence detection. Pressure range 25mm H2O to 760mm H2O standards File 1: Herga Pressure and Vacuum Switches