12 Volt Electronic Gauges - Water Level Section Loading... 1 Liquid Level Indicator for Detroit Diesel Engines Water, fuel, oil Price: $ Qty: ^ Pictures In Stock Add to Cart 2 Pressure Alarm System Siren 6 to 28 VDC -SAH . Price: $ Qty: ^ Pictures In Stock Add to Cart 12 Volt Water Level Electrical water level indicator 12 volts for marine diesel engines.