（1） Pressure guide tube thickness should be appropriate, the general inner diameter is 6 ~ 10mm, the length should be as short as possible, the maximum length should not be more than 50M, in order to reduce the delay of pressure indication. If over 50m, the pressure gauge that can transmit long distance should be selected.
（2） When the pressure guide pipe is installed horizontally, it should be guaranteed to have a tilt of 1:10 ~ 1:20 to facilitate the discharge of the liquid (or gas) accumulated in it.
（3） When the measured medium is easy to condense or freeze, it is necessary to add a heat preservation tracing pipeline.
（4）There should be a cut-off valve between the pressure outlet and the pressure gauge to prepare for the use of maintenance pressure timing. The cut-off valve should be installed near the pressure outlet.
