Limiting Current Type Sensor Oxygen Sensors - SO-A0-010

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Limiting Current Type Sensor Oxygen Sensors - SO-A0-010
Measuring gas: Oxygen concentration

Measuring medium: Gaseous atmosphere

Measuring principle: Limiting current type sensor

Measuring ranges: 0.01 – 1.0 vol.% O2

Model Number: SO-A0-010
Data Sheet:
category: Sensors| Gas Sensors| Zirconium Dioxide Oxygen Sensors




Product Specification
SO-A0-010 Limiting Current Type Sensor Oxygen Sensors
When voltage is applied to a zirconia electrolyte cell, oxygen is pumped through the zirconia disc from the cathode side to the anode side because the carriers of the current flowing through the zirconia electrolyte are oxygen ions. By attaching a cap with a pinhole on the cathode side of the cell and by increasing the voltage over the cell the current shows saturation due to the rate limiting step in the transfer of oxygen to the cathode. This saturation current is called limiting current and is nearly proportional to the ambient oxygen concentration.
Below the advantages of the oxygen sensor:

measuring range 0.01 to 1.0 vol.% oxygen

High accuracy

For many types a more or less linear characteristic

Small temperature dependence of the sensor signal

Low interference with other gases

Long service life

In many cases “Single point calibration“ necessary only once
Applications:

Medical

Laboratory

Food industry

Household/Gastronomy

Measuring technique

Security technology/Monitoring

(Electrical-) industry
Characteristic Data:

Measuring gas: Oxygen concentration

Measuring medium: Gaseous atmosphere

Measuring principle: Limiting current type sensor

Measuring ranges:  0.01 – 1.0 vol.% O2

Response time (t90): 2 to 25 sec. (Depends on: sensor type, gas flow, measuring chamber)

Sensor voltage / heating voltage / power consumption / heater cold resistance

Sensor voltage: 0.7 to 1.6 Volt

Heating voltage: 3.6 – 4.4 Volts

Power consumption:  1.3 to 1.8 Watts (depends on application and packaging)

Cold resistance:  R( 25°C ) = 3.25Ω ± 0.20Ω
Warm up time: Min. 30 s

Maximum permissible operating temperature: 350 °C (*)

*Depending on the cable and filter assembly (see paragraph: specification, Cable assembly)
Permissible volumetric flow rate (Purging the sensor)

For all sensor types, the maximum flow rate depends on the way of purging the sensor (sensor in direct gas flow, gas beam shape, etc.) and the size of the measuring chamber. Exception: SO-E1-xxx (TO8 + hose connection for direct gassing). Permissible flow

[ml/min]: 100 - 500 (optimal: 250)
Lifetime (MTTF): ~ 20.000 hours (*)

*Depending on measuring medium. Stated lifetime refers to a heated, operated sensor of type SO-xx-250 and SO-xx-960. A failure or reaching the lifetime typically means a slight deviation from the dispatch specifications.
Vibration resistance

Sensors based on the TO8 socket as well as those built with a TO39 socket (SO-Bx-xxx, SO-Ex-xxx, SO-Ax-xxx) meet the European Norm EN60068-2-6 (Sinusoidal vibration tests).

http://chinawholesale.blogolink.com/billet/limiting-current-type-sensor-oxygen-sensors-so-a0-010-64918.html

http://www.industrialb2b.loxblog.com/

http://industrialb2b.bravesites.com/entries/general/limiting-current-type-sensor-oxygen-sensors-so-a0-010

http://industrialb2b.publicoton.fr/limiting-current-type-sensor-oxygen-sensors-so-a0-010-846318