Abstract: A portable medical gas system tester is small, lightweight, sturdy, self-contained and portable and can be either pen-activated and/or voice-activated so that it can be operated in the field by just one person. The device can test, collect and interpret data from all medical gas components, such as outlets, valves, alarms, central sources of supply and emergency low pressure oxygen fill connections, and with all medical gases including oxygen, air, vacuum, waste anesthetic gas disposal, nitrous oxide, nitrogen, carbon dioxide and carbon dioxide/oxygen mixtures. The device has a computer, a digital display device, an analog to digital converter, a gas sensor, a pressure and vacuum transducer coupled to the gas sensor, and an oxygen transducer coupled to the gas sensor, an exhaust outlet for venting excess gases to outside of the device's case, a bi-directional flow sensor coupled to gas sensor, and a flow transducer coupled to the flow sensor.

Abstract: A system that can accurately monitor and control low concentrations of ethylene gas includes a test chamber configured to receive sample gas potentially containing an ethylene concentration and ozone, a detector configured to receive light produced during a reaction between the ethylene and ozone and to produce signals related thereto, and a computer connected to the detector to process the signals to determine therefrom a value of the concentration of ethylene in the sample gas. The supply for the system can include a four way valve configured to receive pressurized gas at one input and a test chamber. A piston is journaled in the test chamber with a drive end disposed in a drive chamber and a reaction end defining with walls of the test chamber a variable volume reaction chamber. The drive end of the piston is pneumatically connected to two ports of the four way valve to provide motive force to the piston.

Abstract: A system for measuring crude oil as it is transported from a storage tank to a transport vessel. The transport vehicle includes a fluid conveying line adapted to extend from the storage tank to the transport vessel. A pump is connected to the line to convey the oil from the tank to the vessel. A mass meter is disposed in the line. A microprocessor is electrically connected to and controls the mass meter so as to calculate the volume of liquid transferred from the storage tank to the transport vessel. A sample pot device is connected to the line and capable of taking an oil sample from the line that is representative of the entire amount of oil that is transferred.

Abstract: To eliminate the effects of semiconductive sensor aging in the use of a semiconductive sensor for measuring the state variables of a gas in a system in which a pair of electrodes are embedded in an active semiconductive layer so that the conductivity of the semiconductive layer varies as a function of the state variable, a field electrode is provided and superimposed upon the measurement voltage, a voltage pulse is applied intermittently and the characteristic of the resulting current pulse is used to compensate for changes resulting from aging of the sensor.

Abstract: Apparatus and method for continuous analysis and/or modification of the vapor pressure characteristics of a hydrocarbon stream includes: liquid/gas separation chamber; constant flow liquid influent means; liquid level sensing means; temperature control means; constant pressure gaseous effluent means; liquid effluent means having a flow rate responsive to liquid level sensing means; and influent and effluent flow metering means. Means for sensing composition of gaseous effluent, and manifold means responsive to said composition for variable blending of differing liquid hydrocarbon streams, may also be provided. Influent may be heated or cooled prior to entering the separation chamber.In the preferred embodiment, liquid influent rate is substantially constant. Temperature and pressure, which pressure may be made sub-atmospheric by vacuum means, are selected and maintained.

Abstract: In a method for detecting particles in a gas flow, a probe 8 is charged triboelectrically by particles 10 in the flow and the quantities of electrical charges transferred to the probe are evaluated to provide an indication of the particle flow in the gas flow. In order to reduce the effect of variations in "gas flow related variables" other than those relating to particle flow, an alternating component in the signal caused by the triboelectrical charging of the probe is monitored.