CAI 700 FTIR Heated Sampler

The 7000 Series FTIR is based on Fourier Transform Infra-red Spectroscopy. Nonsymmetrical gas phase molecules absorb IR light which in turn causes the molecular bonds to stretch, bend, or rotate. This absorption is used to measure and quantify several chemical components simultaneously. An IR source emits radiation in the range of 7500 to 375 cm-1 . The IR radiation is
split in a Michelson Interferometer where half of the light passes through to a fixed mirror and the other half is reflected
towards a moving mirror. The two beams recombine and pass through a gas cell where the sample absorbs light at molecule specific frequencies. The remaining light is measured with a DTGS detector and Fourier transformed to convert from time domain to frequency domain producing a single beam spectrum which is ratioed with a baseline spectrum and produces an absorbance spectrum. This absorbance spectrum is quantified with chemometrics to produce a concentration value.

 NEW Touch screen display provides temperature control circuits for oven, pump, and heated sample line to analyzer (5 feet)
 Ensures critical components are maintained at 191 o C
 Single –head heated pump, 5.5 LPM (Optional HI-flow with Variable 11-14 LPM)
 T-Handle heated filter (S21-T type borosilicate element, 0.01 micron) located on front panel for easy access
 Heavy duty high-temperature flow meter
 Solenoid valves for zero, span and bias calibrations
 Electrically actuated ball valve for switching between sample and calibration modes
 Stainless-steel tubing and 1/4” SS bulkhead connection fittings
 Modbus TCP I/O for control and outputs