Austrian SENSORE Limiting Current Type Zirconia Oxygen Sensor (O2 Sensor) - SO-D0-250-A300C

Description of Limiting Current Type Zirconia Oxygen Sensor SO-D0-250-A300C

SO-D0-250-A300C is a limiting current type zirconia oxygen sensor with a measurement range of 0.1~25%, high accuracy, low cross sensitivity, long service life, packaged in a threaded housing with a sintered metal cap, cable length of 3 meters, commonly used in food baking machines.

Working Principle of Limiting Current Type Zirconia Oxygen Sensor SO-D0-250-A300C:

Because the charge carrier in zirconia electrolyte is oxygen ions, when a voltage is applied to the zirconia electrolytic cell, oxygen is pumped through the zirconia disc to the anode. If a cap with a hole is placed on the cathode of the cell, the rate at which oxygen flows to the cathode is limited. Due to this rate limitation, as the applied voltage gradually increases, the current in the cell reaches saturation. This saturation current is called the limiting current, which is proportional to the oxygen concentration in the surrounding environment.

Applications of Limiting Current Type Zirconia Oxygen Sensor SO-D0-250-A300C:

Medical: Oxygen concentrators, incubators
Laboratory: Inert gas processing cabinets (glove boxes), bacterial incubators
Food industry: Packaging, food inspection, monitoring fruit ripening process (storage/transportation)

Home/Cooking: Automated baking/roasting (high temperature >100°C)

Measurement technology: Fixed/portable oxygen measuring instruments, measurements under controlled oxygen content, air conditioning and circulation

Safety technology/monitoring: Fire protection (nitrogen enrichment, e.g., server rooms), greenhouses, wine cellars, gas storage, refineries, diving, fermentation units
Electrical industry: Inert gas processors and cabinets, inert gas welding monitoring, storage under nitrogen enrichment (anti-oxidation), drying equipment, nitrogen concentrators, exhaust gas measurement

Advantages of Limiting Current Type Zirconia Oxygen Sensor SO-D0-250-A300C:

Wide measurement range, 0.1%~25% oxygen
High accuracy

Multiple models exhibit linear characteristics
Low dependence of sensor signal on temperature
Low cross sensitivity
Long service life
In most cases, only a single-point calibration is required

Characteristic Data of Limiting Current Type Zirconia Oxygen Sensor SO-D0-250-A300C:

Measuring gas	Oxygen
Measuring medium	Gas
Measuring principle	Limiting current type sensor
Measurement range	0.1%~25%
Response time (t90)	2~25 seconds (depending on sensor type, gas flow, measurement chamber)
Sensor voltage	0.7~1.6 volts
Heater voltage	3.6~4.4 volts
Power consumption	1.3~1.8 watts (depending on application and packaging)
Cold resistance	R(25°C)=3.25Ω±0.20Ω
Warm-up time	At least 30 seconds
Operating temperature	350°C depending on cable and filter assembly
Allowed flow rate [ml/min]	100~500 (250 recommended)
Lifetime (MTTF)	20,000 hours (*)