Vaisala HPP271MOUNTINGSET2 Quick Manual

Quick Guide

Through-Wall Installation Kit for HPP271 and HPP272

The optional through-wall installation kits for HPP271 (HPP271MOUNTINGSET2) and HPP272
(HPP272MOUNTINGSET2) allow installing the Vaisala HPP270 series H
process through the process wall.
The figure below shows an example installation for HPP272. The HPP271 installation kit is otherwise the
same, but does not include the HPP272-specific temperature probe lead-through. The figure includes
the flange drilling dimensions.
60 mm
Figure 1 Through-Wall Installation Example for HPP272
1 Maximum wall thickness: 4 mm (0.16 in)
2 Screws for tightening the flange in place (4 pcs, Ø 5 mm (0.19 in))
3 Nut for mounting the temperature probe gland (HPP272 only)
4 Temperature probe gland diameter: 8 mm (0.31 in) (HPP272 only)
Seal the lead-throughs on the metal body of the probes.
HPP272 only: Install the main probe body and the temperature probe 60 ... 100 mm (2.36 ... 3.93 in)
apart from each other. The temperature probe must be far enough to prevent heat from the main probe
body from affecting the temperature measurement, but close enough so that the two probes measure
the same environment. When installing the probes horizontally, place the temperature probe
downstream of the warmed main probe body.
Mounting Accessory
HPP271MOUNTINGSET2 / HPP272MOUNTINGSET2
10
mm
1
2
3
4
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© Vaisala 2019
O probes into the monitored
2 2
40 mm
Metal parts: AISI 316L
Seals and O-rings: FPM
M212194EN-B