Heinrichs Messtechnik
Installation and Operation Manual PITe
Page 12 of 22
Long pipelines
In long pipelines, there is always a danger of pressure surges. Therefore, disturbing elements such as
regulating and shut-off devices should be arranged downstream from the sensor. However, when
installed in vertical piping, especially when operating at high temperatures, the regulating and shut-off
devices should be placed in front of the sensor (danger of vacuum).
If this is impracticle, flow conditioners must be installed so that no vortexes can reach the pipe section
of the sensor. The mounting location in the pipe system should be selected so that the installation pipe
with the sensor is continually filled with the medium. This requirement can be met by using drains and
check valves.
Installation of pumps
To avoid negative pressure and eventual damage to the sensor head, never install PITe flowmeters on
the suction side of pumps.
If necessary, arrange for pulsation dampeners when using piston, diaphragm or hose pumps.
Preferred mounting position
To avoid possible sources of error, the mounting position of the
sensor should be carefully chosen.
The ideal angle of installation should lie between 45° and 135°.
When Installed at the top of the pipe (0 °C), gas bubbles may gather
around the sensor head causing large fluctuations in the
measurement signals, whereas sensors installed at the bottom of a
pipe (180 °C) may be affected by sediment deposed in the pipe.
