Tank level gauges

The 115/116 line of level gauges from Mid-West Instrument Inc. (www.midwestinstrument.com) are suitable for stationary or mobile applications of cryogenic/liquified gases. The company says its gauges feature a dry bellows design that uses internal bi-directional relief valves that do not require an internal liquid fill to protect the unit from overrange. The gauges are 30 lbs. lighter than competitive gauges, and can be used for helium and hydrogen service, with ranges from 0-10 in. H₂O to 0-415 in. H₂O.