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ALPHASENSE
ALPHASENSE


O2-E2

Oxygen Sensor

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O2-E2 Oxygen Sensor
Figure 1 O2-E2 Schematic Diagram

Technical Specification

24.6

All dimensions in millimetres (± 0.1mm)

Top View

Bottom View

Side View

PERFORMANCE

Output Response time Zero current Pressure sensitivity Linearity Hysteresis Hand aspirator response

µA @ 20.9% O2 t90 (s) from 20.9% to 0% O2 µA in N2
(% change of output)/(% change of pressure) @ 20kPa

% O2 deviation @ 30% O 2 % O2 change after 16 cycles: 0 to 20.9% O2 % O2 change during aspiration (typical)

260 to 315 < 15 <5 < 0.1 < 0.6 < 0.2 20 to 21.5

LIFETIME

Output drift Operating life

% change in output @ 3 months months until 85% original output of 20.9% O2 % O2 change: 0% to 95% rh @ 40°C % change in output / % CO2 @ 5% CO 2 mm (including label) mm (excluding foam ring) g

<1 > 24

ENVIRONMENTAL

Humidity sensitivity CO2 sensitivity Diameter Height Weight

< 0.7 0.1

PHYSICAL DIMENSIONS

22.2 24.6 < 33

KEY SPECIFICATIONS

Temperature range Pressure range Humidity range Storage period Load resistor

°C kPa % rh continuous (0 to 99% rh short term) months @ 3 to 20°C (store in sealed pot, unshorted Ω (recommended)

-30 to 55 80 to 120 5 to 95 6 47 to 100

NOTE: all sensors are tested at ambient environmental conditions, with 47 ohm load resistor, unless otherwise stated. As applications of use are outside our control, the information provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors are suitable for their own requirements.

Alphasense Ltd, 3 Oak Industrial Park, Great Dunmow, Essex. CM6 1XN, UK Telephone: +44 (0) 1371 878048 Fax: +44 (0) 1371 878066 E-mail: sensors@alphasense.com Website: www.alphasense.com



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O2-E2 Performance Data
Figure 2 Sensitivity Temperature Dependence
106

% Output (relative to output @ 20oC)

104 102 100 98 96 94 92 90 88 86 84 82 80 Mean "+95 conf." "-95 conf."

Figure 2 shows the variation in sensitivity caused by changes in temperature.

See Application Note: AAN 110 on our website

-30

-20

-10

0

10

20

30

40

50

Temperature oC

Figure 3 10kPa Pressure Step Performance
900 800

700

600

Output (uA)

500

Step changes in pressure can cause a temporary signal transient. Positive pressure gives an output signal increase whilst negative pressure causes the output signal to decrease. This repeatability was tested on sensors six months old.

400

300

200

100

0 0 50 100 150 200 250 300

Time (seconds)

Figure 4 Response


























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