Pass Code Protection Option:

Pass code protection prevents unauthorized personnel from 
accessing to the user option menu, calibration function, and 
alarm set-points adjust function. 

Gas Alert Micro --- 898
Gas Alert Micro 5 --- 1007
Gas Alert Extreme --- 871
Gas Alert Max --- 898
Micro Dock 2 --- 532
Fleet Manager II --- Admin


Fixed Gas:

Honeywell XCD: 8202