Detcon PI-500 - Manual (Page 24)

3.8.5.2 PID Plug-In Sensor Maintenance Procedure
All piD Sensor Cells contain six user replacable parts.
Disassembly
1) Power down the instrument and remove the sensor cell.
2) Remove the f iltercap by applying a slight upward pressure with the tip of a screwdriver or an Exacto Blade just
below the hole in the cap and between the cap and the housing.
3) With a f ine tipped tweezers, remove both of the Filter Media and set aside.
4) Using an Exacto Blade, remove the spacer and set it aside
PI-500 Toxic Gas Sensors PG.24