Engineered oxygen measurement

Oxygen measurement built for demanding systems.

AST designs oxygen analyzers and replacement sensors for trace PPM, percentage oxygen, process control, safety, and diving applications.

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Trace PPM to 100% O₂Broad measurement coverage Online and portableProcess and field measurement
AST galvanic oxygen sensor family

Galvanic oxygen sensors engineered and manufactured by AST.

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Product families

Start with the measurement type or application that fits your system.

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Oxygen Analyzers and Transmitters Oxygen Analyzers and Transmitters 10 products Browse family PPM O2 Sensors - Industrial Applications PPM O2 Sensors - Industrial Applications 18 products Browse family % O2 Sensors - Industrial Applications % O2 Sensors - Industrial Applications 24 products Browse family O2 Sensors for Scuba Diving O2 Sensors for Scuba Diving 19 products Browse family O2 Sensors For Ventilators O2 Sensors For Ventilators 8 products Browse family % O2 Sensors - Personal Safety % O2 Sensors - Personal Safety 5 products Browse family

Choose by requirement

Start with what you need to measure.

Trace oxygen monitoringPPM sensors for industrial gas analysis and process control. Percentage oxygen measurementSensors for percentage-level oxygen measurement and safety. Replace an existing sensorCross-reference competitor part numbers with AST replacements.

Designed for critical applications

Reliable oxygen measurement, without unnecessary complexity.

Oxygen-specificBuilt for dependable oxygen response. Low driftStable measurement over operating life. Long operating lifeEngineered for demanding environments. Simple maintenanceOne-point calibration and replaceable sensors.

Engineering resources

Get to the right answer faster.

Use the product catalog and replacement references, or send your measurement range, gas stream, and current analyzer model to AST engineering.

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Product brochureReview AST sensor and analyzer families. Replacement cross referenceMatch competitor models to AST replacements. Request a quoteSend the product and application details.
About AST oxygen sensingOxygen analyzers and replacement sensors for accurate monitoring

Applied Sensing Technologies provides galvanic PPM and percentage oxygen sensors for measuring oxygen from very low PPM levels through 100% O₂. AST supports continuous process monitoring with loop-powered transmitters and online analyzers, as well as portable field measurement with battery-powered analyzers.

AST SRX and SRZ industrial sensors are designed as replacement options for many established analyzer and sensor models. The cross-reference library helps users compare part numbers and identify the appropriate AST sensor for an existing system.

For final product selection, confirm the measurement range, background gas, pressure, temperature, connection, and expected exposure conditions with AST application engineering.

Application support

Need help confirming fit?

Share the current sensor or analyzer model and your process conditions.

Request a quote Engineering support909-517-0037