Zr743 Zirconia oxygen sensor

Long-life, fast-response Zirconia sensor for industrial oxygen measurements

Explore what the Zr743 has to offer

Suitable for gas measurements involving:



Class-leading features




  • Very fast response for oxygen analysis
  • Consistent Nernst output
  • Compact and robust design
  • ‘Soft-start’ electronics and safety features prolong sensor life
  • ‘Constant power’ circuit allows use of unstabilized supply voltage
  • ISO 9001 accredited manufacturing facility
  • NEKTA linearized digital output




Breakthrough Technology

Hummingbird’s unique Zirconia cell provides an accurate and fast response measurement in a design that gives an exceptionally long service life. With an excellent response time and recovery from oxygen shock, Hummingbird’s modern, inhibited-catalyst Zirconia sensor technology offers a significant reduction in cross-sensitivity to trace combustibles.

Having a wide sensitivity to oxygen, from trace ppm levels to 100% O2, Zirconia technology exhibits a faster recovery time when exposed to high ppm levels of oxygen in comparison to a wet electrochemical sensor.

With a measurement range from 0.1-100% O2, the Zr743 is designed for general industrial oxygen measurements.

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Typical Applications

  • Industrial Control
  • Combustion Control

We deliver total assurance to your business

  • assurance-Integrate
    Ease of integration
  • assurance-consult
    Consultative Approach
  • assurance-partnership
    Long term partnerships
  • assurance-support
    On-going engineering support

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