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Teledyne API M452 Ozone Sensor Instruction Manual, 02852, Rev. E
4-6
4.4 Gas Connections
Gas connections to the M452 are made using ¼” compression tube fittings
(M452) or ¼” VCR face seal fittings (M452A.) The ¼” compression
fittings can be used with ¼” O.D. Stainless Steel or Teflon tubing. The
M452 is not sensitive to flow direction; it does not matter which of the two
fittings is used as the gas inlet.
To avoid contamination of the optical cell in the M452, ensure that all
tubing upstream of the M452 is properly cleaned and purged before the
M452 is installed.
In order to achieve an acceptable response time and to avoid sample
degradation, the system should be set up so that a minimum flow rate of
0.1 LPM is established through the M452. If long tubing runs are used
between the measurement point and the M452, then higher flow rates
should be used to avoid sample degredation. Appropriate tests should be
conducted to determine minimum flow requirements.