Asoma Instruments

Other detectors have been developed in the U.S. A leading manufacturer of plastics sortation equipment, ASOMA Instrument Inc. (Austin, TX), developed a simple operator-friendly device for sensing the presence of chlorine atoms contained within the PVC resin. This sensor identifies PVC by x-ray fluorescence as bottles fall through a chute or move on a belt conveyor, at the end of which either the PVC or PET bottles are extracted—in most cases, by a burst of compressed air-jet actuated by the... 

The only systems used on an industrial scale so far are believed to be based on X-ray and IR, mainly for bottles, since the high cost of PET providing an incentive. X-ray absorption systems are made by National Recovery Technologies, USA, and Giovani, Italy. X-ray fluorescence detectors are made by Magnetic Separation Systems (MSS) and Asoma Instruments, both of the USA. 

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