Model 111
The AMI 111 series provide the ideal solution to
percentage oxygen measurement in non-flammable gases. Most portable
percent oxygen analyzers use replaceable electrochemical sensors, which
suffer from drift, temperature and barometric pressure sensitivity, and
require frequent replacement.
This series of analyzers uses a non-depleting
zirconium oxide sensor to measure. The sensor requires no support
gases, and generates an almost perfectly stable reading with minimal
drift for months or years. It is not significantly affected by
temperature changes, or by barometric pressure changes. It will last
for many years without being replaced. When you need an accurate oxygen
measurement in an inert background, this series is unique.
There are three versions of the model 111. The basic
model expects a positive pressure of at least a few inches of water
column, up to a maximum of 100psig.
The 111P version contains a pump that draws the sample from a low
pressure source, such as a glove box at atmospheric pressure or a line
at a partial vacuum. It can draw from vacuums of up to 10”Hg.
The 111B is intended for aerospace applications,
particularly verifying the operation of aircraft inerting systems. It
also uses a pump, but brings the sample to the sensor via flame
arrestors so that if the sample is flammable (for example containing jet
fuel vapors) any ignition would not travel back to the source, or
onward to the exhaust.
All the 111 series are packaged in a welded steel
case. These are industrial strength analyzers that are expected to work
in harsh environments with minimal care and attention.
They support the standard AMI datalogger
functionality, which is to say that they store up to 15 days of readings
that are accessible through the USB port to the AMI software running on
a PC. The internal batteries will last about 8 hours (1 hour for the
111P with the pump running) although the unit can be operated
indefinitely if it is charged while it is running.
The AMI User interface is provided with each analyzer.
