Vaisala HMM100 - Manual (Page 15)

Chapter 2 ___________________________________________________________ Product Overview
VAISALA ________________________________________________________________________ 13
Probe Types
The HMM100 can be ordered with a plastic or stainless steel probe. The
plastic probe is suitable for most applications.
Both probe types have the same operational temperature range. Note that
the operational temperature range is also affected by the filter; see section
Filter Types on page 14.
Figure 2 below shows the plastic probe with a membrane filter (top), and
the stainless steel probe with a sintered stainless steel filter (bottom).
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Figure 2 Probe Types