The Procal 2000 analyser operates on the proven,
single beam, dual–wavelength IR principle. Mid IR Pulses,
at two specific wavelengths per monitored component, are
transmitted through the sample cell. The ‘measure’ pulse is
partially absorbed by the gases being measured while the
‘reference’ pulse remains unaffected. Up to eight wavelengths
are available, sometimes sharing reference wavelengths,
allowing up to six gas-phase component concentrations to be
monitored simultaneously. Uniquely, the operation, zero and
calibration are “fully challenged” in that all operating modes use
the same optical path and system components.