Datasheet AO-09
www.aosong.com Apr.2022
1 / 5
Datasheet AO-09
Oxygen sensor
Li near output
No external power supply
Tem per at u re compe n sat i o n
Fas t re sp o n se
Acc ur at e an d re l i a b l e
An ti- int er fe r e n c e
Product Summary
The AO-09 is an electrochemical oxygen sensor for oxygen concentration measurement and is designed
specifically for medical equipment. The sensor adopts molded body design, provides fast response and has
long life.
Application Scenarios
Using AO-09 requires no external power supply. Sensors been calibrated before leaving the factory.
To avoid the influence of temperature, temperature compensation function is applied in sensors. AO-09
can be used as the sensing component in oxygen analyzer, such as control component in oxygen
generator, medical ventilator, anesthesia equipment, incubator.
Figure 1. AO-09 oxygen sensor
Datasheet AO-09
www.aosong.com Apr.2022
2 / 5
1. Sensor specifications
Table 1. Technical indicators of AO-09
MEASUREMENT
1
Operating principle
Partial pressure electrochemical
Output voltage
9 ~ 13 mV (in ambient air)
Measurement range
0 ~ 100%
Response time (T
90
)
< 15 s
Accuracy
± 1%
Linearity
Linear 0% to 100% O
2
ELECTRICAL
Temperature compensation
< 2% O
2
equivalent (0 ~ 40 °C）
External load resistor
≥ 10 kΩ
Connector
3P 2.54
MECHANICAL
Housing material
White ABS
Weight
40 g (nominal)
ENVIRONMENTAL
Operating temperature range
0 ~ 50 °C
Operating pressure range
0.5 ~ 2.0 Bar
Operating humidity range
0 ~ 99% RH (non-condensing)
OTHER INDICATORS
Long-term output drift in 100% O
2
2
（voltage loss/year）
< 5%
Expected operating life
1.5 x 10
6
% O
2
hours (20°C)
3
0.8 x 10
6
% O
2
hours (40°C)
Shelf life
13 months from date of dispatch
1
The parameters without comment in parentheses in the table are obtained under the conditions of 20 ℃, 50% RH, 1013
mBar and oxygen flow rate of 100 mL/min with the recommended circuit. Specifications outline the performance of
sensors delivered within the first three months.
2
Output signal can drift below the lower limit over time.
3
For example: under the condition of 20 °C, 50% O
2
, the expected service life of the oxygen sensor is
(1.5 × 10
6
50 ) hours = 0.3 × 10
5
hours.