Vaisala HMM100 - Manual (Page 16)

User's Guide _______________________________________________________________________
14 ___________________________________________________________________ M211024EN-C
Filter Types
The available filters for HMM100 are shown in Figure 3 below. All
filters are 12 mm in diameter, and can be used in both the plastic and
stainless steel probe. Note the operational temperature range of each
filter.
For order codes, see section Options and Accessories on page 68.
1204-001
Figure 3 Filter Types
Table 4 Filter Properties
No. Filter Diameter Pore Size Temperature Range
1 Plastic grid filter
(fastest response time)
12 mm - -20 ... +80 ºC
(-4 ... +176 ºF)
2 Membrane filter 12 mm 0.2 µm -20 ... +80 ºC
(-4 ... +176 ºF)
3 Porous PTFE filter
(general purpose)
12 mm 8 µm -70 ... +180 ºC
(-94 ... +356 ºF)
4 Stainless steel
sintered filter
12 mm 38 µm -70 ... +180 ºC
(-94 ... +356 ºF)
5 Catalytic VHP filter
(VHP applications)
12 mm 38 µm -70 ... +180 ºC
(-94 ... +356 ºF)
The catalytic VPH filter is recommended for environments where
vaporized hydgoren peroxide (VHP) is used. It is mechanically similar to
the stainless steel sintered filter, but it can be identified by the line that
has been machined to its base; see Figure 3 above. For more
information, see section Catalytic VHP Filter on page 15.