Home / Avionics / Instruments & Gauges / Fuel & Water Temp Gauge, Compasses / Westach, Low Power Adapter Westach, Low Power Adapter$33.95 Westach, Low Power Adapter quantity Add to cart SKU: INEL100 Category: Fuel & Water Temp Gauge, Compasses Description Description This unit is used to power gauges that require 12 VDC on an aircraft that does not have a battery. The Water Temp. Gauge and the Fuel Level Gauge can use this unit for power. Connects to the AC lighting coil wires from the engine.