RAEGuard 2 PID Gas Detector

Gents,

We are going to install RAEGuard 2 PID Detector as Inline, what kind of interface is required between the detector inlet and 3/4" pipe? it is used to detect Benzene after it pass through carbon filters through vent. see the attached P&ID and the manual of the detector in the below link.

https://app.box.com/s/ocqzwtee1xjt8ln4vjj5vm8w5k9cfjhd