The on-site analyzer (10) includes a housing (14). The housing (14) contains an infrared spectrometer (18) and an optical emission spectrometer (24) for testing a sample (12) of oil. A conduit (32) by operation of a pump (40) draws the sample (12) into the conduit (32), and controllably moves the sample...http://www.google.de/patents/US5537336?utm_source=gb-gplus-sharePatent US5537336 - On-site oil analyzer
