With the increased use of Natural Gas as a fuel, higher natural gas prices, and the new federal regulations, buyers and sellers of natural gas are seriously looking at ways to improve their natural gas measurement and reduce the amount of natural gas that is unaccounted for. An error in measurement of only one tenth of one percent (0.1%) on 100 MMSCF/D Natural Gas selling at 5.50/MCF will cause an over or under billing of 200,750.00 in one year. This will more than pay for a proving system. If the company undercharges it has lost money and if it over charges it has the risk of lawsuits later for huge amounts of money.