Limiting Current Type Sensor Oxygen Sensors - SO-D0-001-A100C / A300C

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Limiting Current Type Sensor Oxygen Sensors - SO-D0-001-A100C / A300C

Post by Admin on Tue Dec 13, 2016 1:17 am


Limiting Current Type Sensor Oxygen Sensors - SO-D0-001-A100C / A300C
Measuring gas: Oxygen concentration

Measuring medium: Gaseous atmosphere

Measuring principle: Limiting current type sensor

Measuring ranges: 10 ppm – 1000 ppm O2

Model Number: SO-D0-001-A100C / A300C
Data Sheet:
category: Sensors | Gas Sensors | Zirconium Dioxide Oxygen Sensors







Product Specification
SO-D0-001
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 10 ppm to 1000ppm 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: 10 ppm – 1000 ppm 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).
 

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