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Included with sensor:
NeuLog NUL-205 Oxygen Sensor Guide (this document).
Neulog oxygen sensor probe attached to the sensor's body by a durable rubber-
coated wire.
30 mL oxygen sensor filling solution.
Replacement membrane cap for the oxygen sensor.
Sensor specifications
In air
Range and
0 to 25%
operation modes
ADC resolution
Resolution
0.01%
Max sample rate
(S/sec)
Accuracy (>15%)
Accuracy (<5%)
Sensor's features:
Fully digital data.
Rugged plastic ergonomic case.
Push button switch for Start/Stop experiments in off line mode.
LED indicator of experiment status (blinks while collecting data).
Attached probe cased in durable plastic.
Note: Neulog products are intended for educational use.
Videos and experiment examples:
Videos, literature and other probes can be found at
http://www.neulog.com/Products/oxygenloggerSensor.aspx
Respiration -
http://www.neulog.com/Portals/3/Users/Experiment B-3 Respiration Ver 3.2.5.pdf
Combustion
-http://www.neulog.com/Portals/3/Users/Experiment%20C-
5%20Combustion%20Ver%203.3.5.pdf
Dissolved (%)
Dissolved (mg/L)
0 to 125%
0.01 mg/L
12 bit
0.01%
0.01 mg/L
100
+/- 1%
+/- 4%
www.NeuLog.com
NEULOG OXYGEN LOGGER SENSOR GUIDE
Gas solubility –
http://www.neulog.com/Portals/3/Users/Experiment%20C-
6%20Gas%20Solubility%20Ver%203.2.4.pdf
Technical background:
The philosophy behind Neulog's plug and play technology is based on each sensor's
ability to store its own data due to an internal flash memory chip and micro-controller
in each plastic Neulog body. This technology allows the sensor to collect and then
store the digital data in the correct scientific units (
The sensor is pre-calibrated at the factory. The built-in software in the logger can be
upgraded for free at any time using the provided firmware update. In spite of that, the
probe needs to be offset prior to initial use. Please review the "Sensor offset" guide at
the beginning of this document for detailed instructions.
The sensor is based on a Clark type probe that includes a platinum electrode and an
AgCl electrode placed in a KCl electrolyte; all is covered by a Teflon membrane.
Oxygen molecules diffuse through the membrane oxidizing the AgCl electrode; this
accepts positive potential while the electrolyte accepts negative potential according to
the following equations:
+
-
2AgCl → 2AgCl
+ 2e
-
→ 2OH
-
O + H
O + 2e
2
The potential difference of the electrodes is converted into an oxygen measurement
by the sensor's controller using the temperature compensation calculation.
Sensor usage and storage:
Prior to use:
1.
Remove the blue rubber cap from the NeuLog oxygen probe.
2.
Unscrew the tip-end membrane cap of the probe, inside you will see a metal
electrode.
o
o
C,
F, Lux, %, ppm, for example).
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