
Desiccant Cartridge
R-Series detectors condense internal moisture when cold water is run through
the tunnel. All detectors must have a functional desiccant cartridge or
corrosion of the internal electronics will occur. The desiccant should be
partially or fully blue. If the desiccant is all orange or pink, change the cartridge
or regenerate desiccant material.
NMT has provided two different types of desiccant cartridges: the small white
“SPEEDAIRE” cartridge and the much larger “DRIERITE” cartridge.
The “SPEEDAIRE” cartridge contains silica gel that is dark blue when it is dry
and turns orange when exhausted. This cartridge is disposable and may not be
refilled. IMPORTANT Be sure to remove the orange plugs at the ends of the
“SPEEDAIRE” desiccant cartridge before installation.
“SPEEDAIRE” Desiccant Cartridge
Desiccant is dark blue,
indicating that it is good
Orange plugs that must be removed prior to installation
IMPORTANT
Rear Panel of R
Detector with
“SPEEDAIRE”
Desiccant Attached to
the Vent
Orange Plugs have
been removed from
the desiccant cartridge
Desiccant is Blue
R-Series Instruction Manual 23
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