Abstract: A system for a sampling hydrocarbon containing gas flowing in a pipeline by collecting a fluid sample in a sampler bottle 55 includes a sample probe 12 secured to and extending outward from the pipeline, a heater body 20 removably secured to the probe, and vortex heater 34 for outputting a cold fluid and hot fluid. The heater body 20 has flow path therein for directing the hot fluid to heat the sample probe, and preferably thereafter heat the bottle 55. The pressurized gas to the vortex heater may be supplied directly from the pipeline P, with pressure control by a regulator 24. Alternatively, pressurized gas such as air may be stored in a portable vessel 172 for supplying compressed air to the vortex heater 34. An improved method of sampling gas in a pipeline using the vortex heater is disclosed.

Abstract: The present invention provides an apparatus and method for accurately controlling the amount of NH.sub.3 to be applied to a field by measuring the NH.sub.3 flow rate without condensing or cooling the NH.sub.3. The system includes a control station 12 on the vehicle with a tachometer 12A or a GPS system for providing a vehicle speed signal to a control panel 13. The control panel includes a toggle switch 17 for adjusting the opening or closing of a valve 52 in the flow line to regulate the flow through the system, although the control panel alternatively may automatically control the valve 52. The vehicle transports a tank 20 containing liquid NH.sub.3 and a tool bar 30 for distributing the NH.sub.3 to the soil. After flowing through the flow meter 40, 60, 130, the NH.sub.3 is conducted to the soil through a series of hoses, fittings, a distributor, and tubing.