Dräger Narkomed 2B Operator's Instruction Manual page 26

Section 2
General Description
Canisters
Dust Cup
Breathing System
Pressure Gauge
2-14
Each absorber unit contains two interchangeable transparent plastic
canisters which house the absorbent. The absorbent, soda lime or
barium hydroxide lime, can be purchased in either loose granular or
prepacked cartridge form.
A removable, transparent plastic cup below the bottom assembly collects
absorbent dust and excess moisture which could cause increased flow
resistance in the system.
The absorber system is equipped with a pressure gauge to enable quick
visual determination of breathing circuit pressure. The gauge is marked
for measurements from -20 to +80 cmH
WARNING: Frequent observation of the breathing system pressure
gauge is mandatory to ensure adequate pressure buildup
and relief, regardless of the mode of operation.
O in increments of 2 cmH
2
O.
2