Wireless Oxygen Gas Sensor
012-16215A
PS-3217
PASCO Capstone
1. Collect an atmospheric air sample (see the
Collecting Samples procedure).
2. Connect the sensor to Capstone.
3. In the Tools palette, click Calibration.
4. Select Concentration then click Next.
5. Select One Standard (1 point slope) then click Next.
6. Click Set Current Value to Standard Value.
7. Review the calibration then click Finish.
Collecting Samples
To collect an atmospheric air sample
NOTE: It is recommended to perform this procedure
outside of a building to collect a fresh sample.
1. Hold the sample bottle upright and open to the air.
2. Insert the stopper of the sensor into the bottle to
seal the bottle.
To collect expired air or other gas samples
1. Place the sensor inside a plastic bag.
2. Press any atmospheric air out of the bag.
3. Use a tube to fill the bag with the gas sample.
4. Secure the bag closed round the tube to contain
the gas sample and exclude atmospheric air.
WARNING: Do not allow the sensor to contact liquids.
CAUTION: Do not clean the sampling bottle in a
dishwasher or autoclave.
LED Status
The status LEDs operate as follows:
Bluetooth LED
Status
Red blink
Ready to be connected to software
Green blink
Connected to software
Yellow blink
Remotely logging data
Battery LED
Status
Red blink
Battery needs to be replaced soon
Green solid
Battery is fully charged
Yellow solid
Battery is charging
Storage
Under 20.9% ambient O
2
, the lifetime of the sensing
element is estimated to be 2 years or longer. The lifetime
of the sensing element will be affected by several factors,
including storage temperature, pressure, and availability
of oxygen. It is recommended to cover the stopper with
the included sample bottle or sensing element storage
bottle when not in use. This will limit its exposure to
oxygen and maximize the lifetime of the sensing element.
How the sensor works
The oxygen sensing element is a galvanic fuel cell with a
gas permeable membrane at one end. The fuel cell
contains an electrolyte, anode, and cathode. When
oxygen enters the fuel cell through the membrane, a
chemical reaction between the metallic cathode and
anode and the electrolyte occurs. This chemical reaction
produces a voltage. The voltage produced is proportional
to the concentration of oxygen present.
