If you need to access a PID for cleaning or replacing, you must remove the rubber boot and belt clip first.

1. How How do I Remove, Clean, or Replace a PID sensor in a MultiRAE Pro? | ISweek
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If you need to access a PID for cleaning or replacing, you must remove the rubber boot
and belt clip first. Please see FAQ for how to remove the rubber boot for instructions on
how to conduct that procedure. The illustrated process for PID Sensor removal, cleaning
and replacement can be found in the Knowledge Base Manual/SOP entry- the steps are
listed below.
1. Turn off the instrument
2. Remove the four screws in holding the MultiRAE Pro sensor compartment cover
in place
3. Remove the cover to expose the sensors
4. Gently lift out the PID module with your fingers
5. If the module requires replacement, place a new module into the slot, being
careful to match the indexing keys. The sensor can only go into its slot one way
6. If you want to open the sensor module to inspect and clean the lamp and sensor
electode panel, you must use the special tool. Its “C” shaped end has small teeth
inside. Slide the tool so that the teeth slip into the notch between the module’s
cap and body
7. Gently pry up the cap using a rocking motion:
8. Once the cap is removed, set it aside
9. Now lift the sensor electrode panel from the module:
10. Clean the lamp’s window with a cleaning swab dipped in methanol lamp cleaner,
and allow it to dry. Do not touch the lamp window with your fingers, as the
residual oil will shorten its life.
11. Inspect the electrical contacts. Clean them with swab dipped in lamp cleaner if
they appear to need cleaning
12. Reassemble the sensor module by placing the sensor electrode panel back in
place and firmly pressing the cap back onto the top
13. Place the sensor module back into the MultiRAE Pro. Make sure the index points
are aligned.
14. Reinstall the rear cover
15. Tighten all four screws
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