SO-E2-250 working principle of 1. limiting current oxygen sensor: 

BecauseThe carriers for the current in the zirconia electrolyte are oxygen ions, so when a voltage is applied to the zirconia cell, oxygen is drawn through the zirconia disk to the anode. If a perforated cover is added to the cathode of the electrolytic cell, the oxygen flows to the cathode.The rate will be limited. Limited by this rate, the current in the cell will reach saturation as the applied voltage is gradually increased. This saturation current is called the limit current, which is concentrated with oxygen in the surrounding environment.proportional to the degree.

2. limiting current oxygen sensor SO-E2-250Application:

Medical: oxygen concentrator, Constant temperature box
Laboratory: inert gas treatment cabinet (glove box), bacteria incubator
Food industry: packaging, food inspection, Monitor fruit ripening process(Storage/Transportation)

Family/Cooking: Automated baking/Baking (high temperature>100℃）

Measurement technology: fixed/Portable oxygen meter, Measurement, air conditioning and circulation with controlled oxygen content

security technology/Monitoring: fire protection (nitrogen addition, e.g. server room), greenhouses, wine cellars, gas storage, refineries, diving, fermentation units
Electrical industry: inert gas processors and cabinets, Inert gas welding monitoring, Storage with increased nitrogen (oxidation protection), drying equipment, nitrogen concentrator, exhaust gas measurement

3. limiting current oxygen sensor SO-E2-250The advantages: 

Wide measurement range,10 ppm~96%Oxygen
High precision
Multiple models have linear characteristics
Small temperature dependence of sensor signal
Low cross sensitivity
Long service life
In most cases, it only needs to be done once.“Single point calibration”

4. limiting current oxygen sensor SO-E2-250Characteristic data:

Measuring gas: oxygen concentration
Measuring medium: Gas
Measurement principle: limiting current type sensor
Measurement range:Type SO-E2-250     0,10 – 25,0 vol.% O2

Response time(t90)2 ~25Seconds(Depending on sensor type, airflow, measuring chamber)

Sensor voltage/Heating voltage/Power consumption/heater cold resistance

Sensor voltage: 0,7 ~ 1,6Volt

Heating voltage:3.6 ~ 4.4Volt

Power consumption:1.3 ~ 1.8Watt(Depends on application and package)

Cold resistance:R(25 °c) = 3.25Ω ±0.20 Ω

Preheating time: at least30 s

Operating temperature up:350℃    Depends on cable and filter assembly (refer to specification and cable assembly section)

Allowable volume flow rate(Sensor purge)

For all types of sensors, the flow rate depends on the sensor purge method (direct current, gas flow shape, etc.) and the measurement chamber size, SO-E1-xxx (TO8  SoftPipe interface, direct ventilation)Except.

Permissible flow[ml/min]: 100 - 500 (250Best)Life(MTTF)~ 20.000Hours(*)

* This depends on the measuring medium. The specified life refersSO-xx-250andSO-xx-960Sensors. Failure to meet or exceed the service life means a slight deviation from the specification parameters.

Vibration resistance
TO8andTO39Shell Encapsulated Sensor(SO-Bx-xxx, SO-Ex-xxx, SO-Ax-xxx)Meets European standardsEN60068-2-6 (sinusoidal vibration test).

5. limiting current oxygen sensor SO-E2-250Specifications: