ABB EasyLine Series Instructions For Installation Start-Up And Operation page 80

80 EasyLine EL3000 Series Commissioning Instructions
Maximum length of the sample gas line
Provide for Sample Gas Line Purging
Connection of the sample gas line
1 Sample gas line (heated or unheated, PTFE or stainless steel tube
with inside/outside diameter 4/6 mm)
Connection either with
O-ring 6.02 x 2.62
2
3 Socket
4 O-ring 12.42 x 1.78
or with
Male fitting with a tapered ISO external thread G1/4"
5
or with
6 Socket
7 Tapered ring
Compression fitting
8
9 Exhaust gas tube for 19-inch housing
10 Waste gas tube for wall-mount housing
The maximum length of the unheated sample gas line (inside diameter
4 mm) is 50 m.
Install a shut-off valve in the sample gas line (definitely recommended
with pressurized sample gas), in order to provide a means for purging the
gas line system by feeding in an inert gas, e.g. nitrogen, from the gas
sampling point.