Our HILO Gas Level Gauge for UK POL gas bottles and gas regulators measure the pressure in the bottle so you get a visual indication if you are running out of gas.
It also includes the great safety feature of of having a Excess Flow Valve built in, so should it see any pressure drop on its outlet - For example, your pigtail burst's, or regulator come lose, or you remove anything connected to it before shutting of the gas bottle, it will automatically shut off the gas supply.
Its maximum flow capacity is 6m3/hr.
Its inlet and outlet are UK POL so it will fit all UK POL valved gas cylinders only. It will not work with 21.8LH outlet fitting gas bottles. ( see picture for clarification )