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MI 59
8.8ProtectiveWindow
Theprotectivewindowcanbeusedtoprotectthesensingheadfrom
dustandothercontamination.Thisshouldbeappliedespeciallyfor
sensors without a lens. These are all models with an optical
resolutionof2:1.
The protective window is made from non‐poisonous zinc sulfide,
withatransmissionfactorof
0.75±0.05.Ithasanouterdiameterof
17mm(0.67in).Theprotectivewindowcanbedirectlyscrewedto
thesensing head.Itwithstandsambienttemperaturesupto 180°C
(356°F).
Forcorrecttemperaturereadings,thetransmissionofthe
protectivewindowmustbesetviathecontrolpanelin
the
sensor’s electronic housing, see section
6.2 Setting of
Modes
onpage35!
Figure44:ProtectiveWindow(XXXMIACPW)