UL approved propane level indicator and safety gauge that is integrated with an easy to see and easy to read colored dial. With built-in features like leak detector and emergency flow-limiter, GasWatchTM 212 is great for use with all types of BBQ Gas Grills and all other Outdoor Propane Appliances having QCC Type I connection. “Easy To Connect, Easy To Read, No Tools Required”, TVL 212 connects between propane tank and the equipment regulator. Ideal for use with BBQ Gas Grills, Patio Heaters, Smokers, Turkey Fryers, Camping Stoves, Cookers, RVs, Boats and all Outdoor Propane Appliances.