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Sensor Type: ..................................... Maxtec MAX-550E galvanic fuel cell
Expected Sensor Life:............. >1,500,000% O
2
Hours over 2 years in typical applications
Alarm System: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . high/low alarms, flashing yellow LEDs,
nominal 975Hz audio buzzer
(according to IEC 60601-1-8 Audible Alarms in Medical Equipment)
Low Oxygen Alarm Range: . . . . . . . . . . . . . . . . . . . . . . . . 15%-99% (>1% lower than high alarm)
High Oxygen Alarm Range: ...................... 16%-100% (>1% higher than low alarm)
Alarm Accuracy: ...................................... exact to displayed alarm value
Dimensions:........................3.6"(W) x 5.8"(H) x 1.2"(D) [91mm x 147mm x 30mm]
Weight: ............................................ approximately 0.89 lbs. (.40 kg)
Cable Length:.............................................. 9 ft. (3m) fully extended
Diverter Fitting: ...............................fits industry standard, 15 mm "T" adapter
7.2 Sensor Specifications
Type: ................................................galvanic fuel sensor (0-100%)
Life: ................................................. 2 years in typical applications
8.0 APPLICATIONS
8.1 Exposure to Anesthetic Gases
Because of the unique chemistry of the oxygen sensors provided with the
MaxO
2
ME Monitor, there are no significant effects when exposed to commonly
used anesthetic gases, however, the monitor is not designed for exposure to
flammable gas mixtures (See WARNING page II).
Interferent Volume % Dry Interference in O
2
%
Nitrous Oxide 60%, balance O
2
<1.5%
Halothane 4% <1.5%
Enflurane 5% <1.5%
Isoflurane 5% <1.5%
Helium 50%, balance O
2
<1.5%
Sevoflurane 5% <1.5%
Desflurane 15% <1.5%
NOTE: Balance mixture 30% O
2
/70%N
2
O, unless otherwise specified
8.2 Calibration Techniques in Pressurized Systems
Similar to other oxygen sensors, the Maxtec MAX series sensors measure the
partial pressure of oxygen in a gas stream. This is correlated to read “percent
oxygen” on the MaxO
2
ME Monitor. It is important to note that the sensor output
is directly proportional to the partial pressure of oxygen. Thus, one must take into
consideration the effect of exposing the sensor to various gas sample pressures.
For example, if a monitor is calibrated to read 20.9% in ambient air
(atmospheric pressure) and then exposed to a pressurized gas sample
containing a known concentration of oxygen, the monitor will display a reading
greater than the actual oxygen percentage.
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