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PHOTOMETER ASSEMBLY
ETC00781(4) Series 100 e 02/2004
This extremely simple and windowless design enables easy cleaning of the cells in the event of
contamination.
The only optical surfaces which also might become contaminated are the chopper windows and
the windows of the filter cells; these are accessible upon removal of the cell body.
The filter cell (14/15) has a necked conical shape for optimal adaptation of the analysis cell beam
cross - sectional profile to the active area of the detectors.
For high measurement ranges (up to 100 %), an adapter cell (10) is required.
The use of a spacer ring (08) creates an analysis cell in the space between the exit window of the
adapter cell and the entrance window of the filter cell.
PYROELECTRICAL DETECTOR