초록 ▼

A system for measuring the content of foreign substances in a gas stream, for example oil in a stream of compressed air. The system includes at least one probe for collecting a given amount of gas. In the probe there is at least one sensor over which the sampled gas is passed. For optimum evaluation

A system for measuring the content of foreign substances in a gas stream, for example oil in a stream of compressed air. The system includes at least one probe for collecting a given amount of gas. In the probe there is at least one sensor over which the sampled gas is passed. For optimum evaluation and for signaling certain states of operation, the sensor includes a temperature sensor for determining the temperature of the gas sample flowing past it, and a detector whose electrical resistivity or conductivity depends on the nature and density of the foreign substances in the gas. The output signal of the detector corresponds to the concentration of foreign substance in the gas stream, and is processed in an electronic evaluation unit.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for determining a content of a foreign substance in a gas stream, said apparatus comprisingat least a first probe and a second probe for collecting gas samples from the gas stream, each of said probes having a measuring chamber containing at least one sensor

[ What is claimed is:] [1.] An apparatus for determining a content of a foreign substance in a gas stream, said apparatus comprisingat least a first probe and a second probe for collecting gas samples from the gas stream, each of said probes having a measuring chamber containing at least one sensor past which the collected gas sample flows, said sensor comprising a temperature sensor for measuring the temperature of the gas sample and a detector having electrical characteristics which vary depending on the foreign substance content of the gas sample, said first probe having an inlet reaching into a central region of the gas stream between a top wall and a bottom wall of a supply line in which the gas stream is carried, and said second probe having an inlet which reaches into a lower region of said gas stream adjacent said bottom wall of the supply line in which the gas stream is carried, andmeans for receiving output signals from said temperature sensor and from said detector and for evaluating the output signals from the detector and the temperature sensor in order to determine the foreign substance content of the gas stream.