A gas meter prover is a device which verifies the accuracy of a gas meter. The fork end is routinely used to shut off gas meter valves. In 1816 he made the first reliable wet gas meter. After leaving the roads department in 1884 he obtained work with a gas meter factory. Any type of gas meter can be obtained with a wide variety of indicators. Clegg also developed a practical gas meter. In 1893 the building was leased to Cowan's gas meter manufacturers for five years. Thomas Glover invented the original diaphragm gas meter in 1843. A gas meter measures energy indirectly by recording the volume of gas used. He invented the penny-in-the-slot gas meter. In 1998, she hit a gas meter while driving under the influence of alcohol.