SRX-MA333 PPM O2 Sensor Replaces GPR-12-333 and OXY-T-1 PPM O2 Sensor

SRX-MA333 PPM O₂ Sensor replaces Analytical Industries Model GPR-12-333 PPM O2 sensor. The SRX-MA333 is a high-performance electrochemical micro fuel cell designed for accurate trace oxygen measurement in industrial gas analysis applications. It is also a direct replacement for the Analytical Industries Model OXY-T-1 PPM O₂ Sensor, allowing users to replace existing sensors without modifying their analyzers.

With a signal output greater than 600 µA in ambient air, the SRX-MA333 provides an excellent signal-to-noise ratio. As a result, it delivers stable and accurate oxygen measurement, even at very low PPM oxygen concentrations.

SRX-MA333 PPM O₂ Sensor for Trace Oxygen Measurement

The SRX-MA333 PPM O₂ Sensor measures oxygen from high PPM down to low PPM concentrations in inert gas streams and gaseous hydrocarbon streams. Therefore, it is ideal for applications that require continuous monitoring of trace oxygen to protect product quality and process integrity.

Its industry-proven electrochemical micro fuel cell technology responds only to oxygen. Consequently, the sensor provides excellent selectivity, fast response, and dependable long-term performance.

SRX-MA333 PPM O₂ Sensor Features and Performance

The SRX-MA333 PPM O₂ Sensor incorporates a proprietary super-activated lead anode and advanced electrolyte formulation. Together, these technologies provide fast response, excellent stability, and rapid recovery following exposure to ambient air.

Typically, the sensor recovers from ambient air to below 10 PPM O₂ in less than 60 minutes, allowing operators to resume trace oxygen measurements quickly after maintenance or calibration.

In addition, the proprietary electrolyte improves performance throughout the recommended operating temperature range, including temperatures near freezing. As a result, the sensor maintains stable output under demanding operating conditions while minimizing calibration requirements.

Under normal ambient temperature and pressure, the expected operating life is 12–18 months.

SRX-MA333 PPM O₂ Sensor Gas Compatibility

The SRX-MA333 PPM O₂ Sensor is recommended for oxygen measurement in:

• Inert gas streams
• Nitrogen
• Argon
• Helium
• Gaseous hydrocarbon streams
• Process gas sampling systems
• Industrial oxygen analyzers

For gas streams containing high concentrations of CO₂ and trace levels of acidic gases, such as H₂S, Applied Sensing Technologies recommends the SRZ-MA333 PPM O₂ Sensor. The SRZ-MA333 is specifically designed to provide superior performance in these applications.

However, neither the SRX-MA333 PPM O₂ Sensor nor the SRZ-MA333 PPM O₂ Sensor is recommended for use in highly reactive or corrosive gases, including:

• SF₆
• HCl
• NH₃

Direct Replacement for Analytical Industries GPR-12-333

The SRX-MA333 PPM O₂ Sensor is designed as a direct replacement for:

• Analytical Industries GPR-12-333 PPM O₂ Sensor
• OXY-T-1 PPM O₂ Sensor

Because the sensor is fully compatible with these models, users can install it without modifying their existing analyzer or monitoring system.

Designed and Manufactured in the USA

Applied Sensing Technologies designs, develops, and manufactures the SRX-MA333 PPM O₂ Sensor in the USA. Every sensor is built using proven electrochemical oxygen sensing technology and undergoes strict quality control to ensure consistent performance, long operating life, and dependable trace oxygen measurement.

Whether monitoring inert gases, hydrocarbon process streams, or industrial gas systems, the SRX-MA333 PPM O₂ Sensor delivers the accuracy, reliability, and fast response required for demanding trace oxygen applications.