Optical Spectrum Analyzers Chapter 6: Pure Air
Rev D, June 16, 2022 Page 20
Chapter 6 Pure Air
OSA instruments have two hose connectors which can be connected to an external air purifier, such as Thorlabs
Item # PACU Pure Air Circulator Unit. We recommend a flow rate of 2 liters/min. Simply attach two hoses (one
supply and one return) to the 1/4" inner diameter quick-connections on the back of the OSA. Compatible tubing
is sold as Thorlabs Item # PACU-TG.
WARNING
If purging gas other than dry air is used, make sure that the environment for the operator is well
ventilated since the gas will leak out from the instrument.
Figure 15. OSA20xC ¼" Inner Diameter Quick-Connections for a Purified Air Supply
Figure 16. ¼" Inner Diameter Quick-Connections for a Purified Air Supply on the Redstone
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