ULC Subject C180-M1979

1.1 These requirements cover liquid-level gauges and indicators for use on vented tanks used for the storage of flammable liquids. 1.2 Liquid-level gauges and indicators covered by these requirements include the following: A) Float-operated liquid-level gauges for use with inside tanks for oil burner fuel; B) Tank-filling signals for use with inside tanks for oil burner fuel; C) Float-operated permanent magnet-type liquid-level gauges for use with inside tanks for oil burner fule, aboveground, or underground and enclosed inside storage tanks; D) Hydrostatic-balance remote-reading-type liquid-level gauges for use primarily with aboveground or underground and enclosed inside-storage tanks; E) Hydraulic-pressure transmission remote-reading type liquid-level gauges for use primarily with aboveground or underground and enclosed inside-storage tanks. 1.3 These requirements do not cover electrically operated remote reading type liquid-level gauges or equipment intended to control flow into or out of a storage tank. 1.4 "Flammable Liquids", as used herein, means fuel oil, gasoline, kerosene, and similar petroleum products. 1.5 Requirements for the installation and use of these gauges and indicators are included in the Installation Code for Oil Burning Equipment, CSA B139.