Abstract: A small apparatus for the production of mixtures of LPG vapor and air, also called synthetic natural gas, with properties that allow these mixtures to be used in place of natural gas in mostly temporary installations for residential and industrial or commercial installations. The entire apparatus is designed to produce synthetic natural gas without permanent presence of operating personnel. Noise, typically associated with the operation of venturi-type vapor/air mixing devices, is suppressed by a combination of an air-intake filter and a noise-reducing device to a level that make the apparatus suitable for installations close to residential developments. A second vapor/air mixing apparatus, identical to the main system, is installed on the same support frame, acting as a backup device for the main system in situations of equipment malfunctions or temporary system overload. Equipment malfunctions are reported to centralized monitoring stations by means of a telephone-based signaling device.

Abstract: An apparatus for the continuous measurement of the interchangeability of LPG/Air Mixtures with Natural Gas, having a sensor that measures the relative density (specific gravity) of an LPG/air mixture, and associated controls for gas sampling, signal processing and computation of mixture properties and interchangeability factors. The entire apparatus, gas sampling components, and signal conditioning devices are carried in one or more housings, having one sample gas inlet port and one or more waste gas outlet ports, one gas density sensor, one or more microprocessor-based signal processing units, and one or more connected operator interfaces. The measurement data from the gas density sensor is combined in the microprocessor-based signal processing unit with user-provided information about the properties of the LPG feedstock.

Abstract: An apparatus for the continuous measurement of the interchangeability of LPG/Air Mixtures with Natural Gas, having a sensor that measures the relative density (specific gravity) of an LPG/air mixture, and associated controls for gas sampling, signal processing and computation of mixture properties and interchangeability factors. The entire apparatus, gas sampling components, and signal conditioning devices are carried in one or more housings, having one sample gas inlet port and one or more waste gas outlet ports, one gas density sensor, one or more microprocessor-based signal processing units, and one or more connected operator interfaces. The measurement data from the gas density sensor is combined in the microprocessor-based signal processing unit with user-provided information about the properties of the LPG feedstock.