Replacing the Pump
If your AreaRAE Plus/Pro’s pump requires replacement, follow these steps.
IMPORTANT! Turn off the instrument and remove the battery before proceeding.
IMPORTANT! Remove the external filter before proceeding.
1. Remove the sensor compartment cover.
2. Turn it upside down and set it on a soft flat surface.
3. The pump assembly is attached to the sensor compartment cover with two Philips
screws. Remove the two screws.
4. Lift off the pump assembly.
5. Pressing down on the gas plate with one hand, disconnect the pump from internal tubing
by gently pulling it out. It has an inlet and outlet that are held in the two holes with rubber
O-ring gaskets.
AreaRAE 121 User Manual
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