MeshGuard LEL IR & CO2 IR User’s Guide 
 
44 
 
Sensor And Internal Battery Replacement 
 
The MeshGuard LEL IR is permanently mounted to a solid surface by first securing it in its steel 
enclosure (a screw through the back mates with the instrument) and then securing the enclosure to 
a solid surface such as a wall or the metal mounting plate. 
 
 
 
Front, side, and rear views of the steel enclosure show how the instrument is secured for 
mounting. 
With the instrument securely in its housing, you can remove the cover over the battery 
compartment so that you can replace the internal battery in the MeshGuard LEL. Use the sensor 
and battery removal tool as shown. 
 
 
 
WARNING: Use only  RAE Systems battery P/N 500-0111-000 (EVE ER34615 or XENO XL-205F) 
for the internal battery.  The internal battery must be replaced under a Hot Work Permit, where the 
atmosphere is determined to be non-hazardous while the battery is being replaced. 
 
   
removal tool  
(P/N 019-2044-000) 
 
of enclosure mates  
to rear of 
MeshGuard LEL IR  
 
(or nut) with flat 
washer and lock 
washer to secure 
enclosure at all 
four corners