Accessories
MI3 Rev. G Nov/2015 81
Isolation Kit
Fixed Mounting Bracket
10.3.3 Isolation Kit
The isolation kit (MI3100ISOKIT) can be used likewise for the fixed mounting bracket (XXXMI3100FB)
and the adjustable mounting bracket (XXXMI3100ADJB). Two non-conductive rings insulate the
sensing head (1M, 2M) electrically from the mounting bracket. The isolation kit is used to implement
installations with one earth grounded point only, see section 4.5 Electrical Interference, page 24.
The maximal ambient temperature for the isolation kit is 250°C (482°F). The delivery for the isolation
kit consists of two insulating rings made of Teflon and a mounting nut made of stainless steel. The
desired mounting bracket needs to be ordered separately.
Make sure that the insulating rings are mounted so that both extruded lips facing each other. Use the
two mounting nuts to secure the arrangement.
Figure 71: Installing the Isolation Kit (MI3100ISOKIT)
Exemplary shown for fixed mounting bracket
Installing the Isolation Kit requires a mounting bracket in its latest version (inner
diameter of 20 mm (0.79 in) instead of 18.5 mm (0.73 in) for the previous version)!
10.3.4 Air Purge Collar
The Air Purge Collar is used to keep dust, moisture, airborne particles, and vapors away from the
lens. It can be mounted before or after the bracket. The Air Purge Collar comes with a 1/8” NPT
stainless steel fitting. Air flows into the fitting and out the front aperture. The pressure of air should be
0.6 to 1 bar (8.7 to 15 PSI). Clean, oil free air is recommended.
Figure 72: Dimensions of Air Purge Collar (XXXMI3100AP)
Extruded Lips facing each other
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