Proton Products Ltd supplies Water Temperature Resistant Capacitance Gauges. Proton Products Ltd is an ISO 9001 awarded company. Proton Products Ltd offers various types of instrumentation and control equipment for use in industrial production. Water Temperature Resistant Capacitance Gauges is ideal for continuous measurement of insulation capacitance on cable extrusion lines, enabling manufacturers to control the stability of the capacitive characteristics of their cable insulation.