O2-A3 Oxygen Sensor

Oxygen Gas Sensor, A-Series, 3Y Life

The O2-A3 is a galvanic oxygen sensor engineered for industrial safety applications, especially in portable gas detection instruments. With a 3-year operational life, it delivers consistent performance in harsh environments. Its bias-free design and 2-pin interface simplify integration, while instant-on capability ensures immediate monitoring without warm-up delay. The O2-A3 offers extended operational life for fixed installations and portable instruments. Perfect for long-term deployments with minimal maintenance, delivering stable performance in harsh environments.
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Key Specifications:

 

Sensor Model

Target Gas

Package Size

Concentration Range

Sensitivity

T90 Response Time

Interface/Pins

Bias

Lifetime

O2-A3

Oxygen (O2)

Extended life,
lead-based

0-30% O2

55 to 85 µA @ 20.9% O2

<18s (typical)

2-pin galvanic

None

36 months

 

Feature

Benefit

No bias voltage required

Simplifies electronics and integration

Zero warm-up time

immediate operation on power-up

Fast response time (<8s)

Enables rapid detection of oxygen changes

Wide environmental tolerance

Operates from –30 to +55°C, 5–95% RH, 80–120 kPa

Patent pending leak-free design

Eliminates costly board repairs due to leaks