Asair AOX3000 Lead-free Oxygen Sensor - Industrial Fuel Cell Design

The AOX3000 provides an analog current output. In standard air (20.9% O2), it outputs 0.10 ± 0.03 mA. The current is linearly proportional to oxygen concentration in the 0-30% range, simplifying signal conditioning for microcontrollers or transmitters.

The sensor outputs a small current. You will need a precision resistor (e.g., 10-100 ohms) to convert the current to a measurable voltage. This voltage signal can then be read by an analog-to-digital converter (ADC) on an Arduino, Raspberry Pi, PLC, or dedicated transmitter module designed for electrochemical sensors.

The AOX3000 has a design life exceeding 5 years. As a fuel cell sensor, its lifespan is not consumed by the sensing reaction under normal use. Longevity can be affected by extreme temperatures outside the -30°C to 50°C range, exposure to contaminant gases, or physical damage to the membrane.

Yes, like all precision electrochemical sensors, periodic calibration is recommended for maintaining accuracy. Calibration typically involves exposing the sensor to a known zero gas (nitrogen) and a span gas (e.g., 20.9% oxygen in nitrogen) to adjust the output baseline and gain in your measurement system.