This sensor measures the amount of Oxygen (O2) gas
in
air.
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Model SO-111: |
$289 |
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MAKING A MEASUREMENT
To obtain oxygen concentration in
percent, the sensor’s mV output is multiplied by a
conversion factor. The conversion factor is determined by
the user during calibration. To calibrate divide 20.95 % by
the sensor’s mV output in open air. For example, 20.95 % O2
/ 12 mV = 1.746 % O2
/ mV. The sensor’s mV output multiplied
by 1.746 will yield the percentage of oxygen present for the
current humidity, temperature, and elevation.
The concentration of oxygen in the atmosphere is 20.95 %.
However, at higher elevations the air is less dense and the
sensor should be recalibrated to account for this.
Post-calibration changes in pressure, temperature, or
humidity can introduce an error.
Example datalogger programs are available to account for
changes in pressure, temperature, and humidity. All oxygen
sensors come equipped to measure temperature, but humidity
and pressure sensors must be added separately. |
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