Model 633 Aethalometer® Black Carbon Monitor User Manual | Teledyne Advanced Pollution Instrumentation |
1.1.4 Modular Construction
The Model 633 Aethalometer is constructed with a modular design, so that sub‐units may be easily serviced. The only item requiring attention in routine use is cleaning of the optical insert to remove accumulated dust or other contamination which may be brought in with the sample air stream. The optical chamber is attached with a bayonet fitting for quick removal; easy cleaning; and reliable re‐assembly. The entire instrument is hermetically sealed to reduce the entry of dust.
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