OVERVIEW FILTERS
Description
Filter carriers protect the humidity and temperature sensors against mechanical damage. Filters act as a protective barrier against contaminants/ pollutants that can influence the sensor. When choosing the correct combination of filter carrier and filter there are many factors to consider. Specific conditions such as high air velocities, pollutants in the air, disinfection and cleaning routines, mechanical impacts, high bioactivity, condensation, airborne chemical contaminants and required response time are some of the many considerations.
Plastic filter carrier |
Metal filter carrier |
|---|---|
oMaximum temperature: 100 °C oMechanical protection 
|
oMaximum temperature: 200 °C oMechanical protection 
|
Overview filters |
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|---|---|---|---|---|
Teflon filters |
Polyethylene filters |
Sintered steel filters (stainless steel) |
Wire mesh filters (metal) |
|
Maximum temperature (consider range of application of filter carrier) |
200 °C |
100 °C |
200 °C |
200 °C |
Protection against particulates |
✔✔ |
✔✔ |
✔ |
✔ |
Protection against abrasives in the air |
|
|
✔✔✔ |
✔ |
Pore size |
10 µm |
40 µm |
25 µm |
10 µm |
Maximum air velocity [m/s] (continuous load) |
50 |
50 |
70 |
50 |
✔ = low / ✔✔ = medium / ✔✔✔= high
Order code |
Filter carrier |
Filter element |
Pore size |
Range of application |
|
|---|---|---|---|---|---|
SPA-SS |
1.4301 |
No filter, only filter carrier |
-50…100 °C |
 |
|
SPA-SS-PE |
Polyethylene, white |
40-50 µm |
 |
||
SPA-SS-PTFE |
PTFE, white |
10 µm |
 |
||
SPA-SS-WM |
Wire mesh 1.4401 |
10 µm |
 |
||
SPA-SSS |
Filter carrier incl. filter |
Sintered steel 1.4404 |
25 µm |
-100…200 °C |
 |
SPA-WM |
No filter carrier, only filter |
Wire mesh 1.4401 |
10 µm |
 |
|
SPA-PCB |
Polycarbonate, black |
No filter, only filter carrier |
-50…100 °C
|
 |
|
SPA-PCB-PE |
Polyethylene, white |
40-50 µm |
 |
||
SPA-PCB-PTFE |
PTFE, white |
10 µm |
 |
||
SPA-PCB-WM |
Wire mesh 1.4401 |
10 µm |
 |
||
SPA-PCW |
Polycarbonate, white |
No filter, only filter carrier |
-50…100 °C |
 |
|
SPA-PCW-PE |
Polyethylene, white |
40-50 µm |
 |
||
SPA-PCW-PTFE |
PTFE, white |
10 µm |
 |
||
SPA-PCW-WM |
Wire mesh 1.4401 |
10 µm |
 |
||
SPA-PE |
No filter carrier, only filter |
Polyethylene, white |
40-50 µm |
 |
|
SPA-PTFE |
No filter carrier, only filter
|
PTFE, white |
10 µm |
-100…200 °C |
 |