A specialized temperature switchgauge custom-manufactured by Boss Industries using FW Murphy’s core Swichgage mechanical diaphragm and electrical limit contact design. This specific gauge is a dual-function dial gauge and electrical limit switch is widely utilized to protect industrial rotary screw air compressors, utility vehicle integrations, and PTO-driven truck equipment from overheating by monitoring engine and equipment temperature while triggering alarms or shutdowns. It features a temperature range of 0-250°F and a capillary length of 4 feet.

How It Protects Your System: Liquid sealed inside the copper capillary vaporizes as your machinery heats up. This builds physical pressure to move the visual indicator needle. If the temperature climbs high enough to touch the pre-set limit contact, it grounds the circuit to immediately trip an alarm horn or shut down the machine before catastrophic engine damage occurs.