HM41 & HM45 (HMP113 probe)
The standard choice. It provides the fastest
response time, as air can flow freely around the
sensors.
Has a membrane under the plastic grid (0.2 µm
pore size) for additional protection against
contaminants. It slows down the response time
The standard choice. The membrane should be
changed periodically and when it is getting
The standard choice. It has the same
temperature tolerance as the probe itself.
Provides a faster response time than the
sintered filter but it has a more limited
temperature tolerance. This filter is only
recommended for non-demanding applications.
Provides a faster response time than the
sintered filter but it has a more limited
temperature tolerance. The membrane under
the plastic grid provides additional protection
against contaminants compared to using only
For instructions on replacing a filter, see section
Changing the Filter on page 45.