Infrared Spectrometer TJ270-30A TJ270-30B Infrared Spectrometer TJ270-30A TJ270-30B TJ270-30A is a new improved model from the base of TJ270-30 developed by our company, easy ... to operate and the software is convenient.TJ270-30A with perfect ability, widely used in oil industry, ... research, production and school education.TJ270-30B is updated type from TJ270-30A, its scanning speed is about 30 ...