Electric or electronic sensors, gauges and indicators for measuring and displaying liquid levels and properties of liquids, the properties being presence, concentration, quality or suitability of compounds contained in the liquids, namely, tank level sensors and in-tank measurement systems composed principally of sensors, gauges and indicators for use in connection with stationary engines, on-road vehicles and off-road vehicles, for measuring levels and properties of liquids including fuel, brake fluid, oil, window washer fluid, diesel exhaust fluid, engine coolant, liquefied petroleum gas, and water, potable or otherwise; instruments for measuring presence, concentration, quality, or suitability of urea in diesel exhaust fluid solutions; level gauges and indicators; liquid level sensors; liquid temperature sensors and indicators
Electrical and Scientific Apparatus