O2-A3

O2-A3

Manufacturer:: Alphasense

Alphasense O2-A3 Galvanic Electrochemical Oxygen Sensor

Specifications

Product Introduction

The O2-A3 is an oxygen sensor designed to measure oxygen concentration in ambient air. It provides a reliable and accurate method for oxygen detection in various applications. The sensor operates on the principle of a capillary oxygen sensor and is engineered for long-term stability and consistent performance.

Features

  • Long operating life
  • Low zero current
  • Minimal humidity sensitivity
  • Stable output over time
  • Low pressure sensitivity
  • Fast response time

Applications

  • Oxygen monitoring in safety systems
  • Environmental monitoring
  • Industrial process control
  • Medical devices
  • Automotive emissions testing

Specifications Table

Output 55 to 85 µA @ 22°C, 20.9% O2
Response time t90 < 15 s from 20.9% to 0% O2 (47Ω load resistor)
Zero current < 2.5 µA @ 99.99% N2, 22°C
Output drift < 2% change in output @ 3 months
Operating life > 36 months until 85% original output in 20.9% O2
Humidity sensitivity < 0.7% O2 change: 0% to 95% rh @ 40°C
CO sensitivity < 0.1% change in output / % CO @ 5% CO2
Pressure sensitivity < 0.1 (% change of output)/(% change of pressure) @ 20kPa
Temperature range -30 to 55 °C
Pressure range 80 to 120 kPa
Humidity range 5 to 95 % rh non-condensing (0 to 99% rh short term)
Storage period 6 months @ 3 to 20°C (store in sealed container)
Load resistor 47 to 100 Ω (recommended)
Height 17.4 mm (including foam ring)
Weight < 16 g

To learn more, please download the PDF.

Datasheet: