公开(公告)号：WO1980000748A1

公开(公告)日：1980-04-17

申请号：PCT/US1979000803

申请日：1979-10-01

Applicant: ANDROS INC

Inventor： ANDROS INC ,  BUROUGH I

IPC: G01N21/24

CPC classification number: G01N21/3504

Abstract: A gas analyzer and gas analyzing method are described of the non-dispersive infrared type wherein infrared energy is passed through a sample cell (11) containing an unknown mixture of gas. The infrared energy passing through the cell is received by a detector (13) and an electrical signal is produced representative thereof. A rotary filter wheel (15) positions at least one filter (16) in the path of the infrafed energy, resulting in a pulsating detector output. The electrical signal is processed to produce an output indicating the concentration of the constituents of the gas mixture in the sample cell. Synchronization with the processed electrical signal is obtained by deriving synchronizing pulses directly from the electrical signal produced by the detector.

公开(公告)号：BR7908854A

公开(公告)日：1981-08-04

申请号：BR7908854

申请日：1979-10-01

Applicant: ANDROS INC

Inventor： BUROUGH I

IPC: G01N21/61