P53

Apparatus for analyzing vapor and gas in the nature of vapor and gas pipeline sample takeoff conditioning and analyzing system assemblies consisting of two or more of the following components, electrical power supplies, sample takeoff probes for scientific purposes, automatic valves, flow regulators for commercial use, liquid separators, pressure regulators, electric heaters, and electrical distribution junctions; scientific instrumentation for sampling, conditioning, and verifying the energy content of natural gas; technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids