Abstract: A gas analyzer to non-destructively detect the concentration of a gas in a container includes a sensor unit with an infrared emitter configured to transmit infrared radiation over a path through the container. There is an infrared detector configured to receive a portion of the infrared radiation transmitted by the infrared emitter and to produce an output signal corresponding to the received radiation. There is a processor module, in communication with the sensor unit, configured to receive the detected spectrum from the infrared detector, the detected spectrum including a trough region at wavelengths which absorb the gas in the pressurized container. The processor is also configured to form an interpolated baseline spectrum from the detected spectrum by interpolating baseline data points spanning the trough region and to calculate a gas concentration in the container using the detected spectrum and the interpolated baseline spectrum.

Abstract: A gas analyzer to non-destructively detect the concentration of a gas in a container includes a sensor unit with an infrared emitter configured to transmit infrared radiation over a path through the container. There is an infrared detector configured to receive a portion of the infrared radiation transmitted by the infrared emitter and to produce an output signal corresponding to the received radiation. There is a processor module, in communication with the sensor unit, configured to receive the detected spectrum from the infrared detector, the detected spectrum including a trough region at wavelengths which absorb the gas in the pressurized container. The processor is also configured to form an interpolated baseline spectrum from the detected spectrum by interpolating baseline data points spanning the trough region and to calculate a gas concentration in the container using the detected spectrum and the interpolated baseline spectrum.

Abstract: A system for testing the chemical content of a plurality of plastic containers continuously moving along a test line. The system includes a detector maintained at a first vacuum level for sequentially receiving a sample of air from each of the plurality of plastic containers as they move along the test line and for detecting the chemical content of each of the samples. There is a conduit including a first end proximate the plurality of plastic containers and a second, remote end. There is a sensor module interfacing the conduit between its first end and the second ends. There is also a vacuum pump interconnected to the second end of the conduit to maintain the interior of the conduit at a second, lower vacuum level and to establish an airflow rate to sequentially withdraw and transport air samples from the plastic containers to the sensor module.

Abstract: A system for testing the chemical content of a plurality of plastic containers continuously moving along a test line. The system includes a detector maintained at a first vacuum level for sequentially receiving a sample of air from each of the plurality of plastic containers as they move along the test line and for detecting the chemical content of each of the samples. There is a conduit including a first end proximate the plurality of plastic containers and a second, remote end. There is a sensor module interfacing the conduit between its first end and the second ends. There is also a vacuum pump interconnected to the second end of the conduit to maintain the interior of the conduit at a second, lower vacuum level and to establish an airflow rate to sequentially withdraw and transport air samples from the plastic containers to the sensor module.