Product imagery shown for reference. Confirm the exact configuration before ordering.
Model AST-25F3 % Oxygen Sensor
SRX-25F3 Oxygen Sensor replaces Figaro KE-25F3. Its a galvanic type micro fuel cell specific to oxygen. SRX-25F3 utilizes aqueous KOH electrolyte instead of acid electrolyte. Aqueous KOH electrolyte enhances the sensor's performance in terms of accuracy, stability, repeatability and expected operating sensor life. This sensor ideal for inert…
Technical information
Product details
Technical overview
SRX-25F3 Oxygen Sensor replaces Figaro KE-25F3. Its a galvanic type micro fuel cell specific to oxygen. SRX-25F3 utilizes aqueous KOH electrolyte instead of acid electrolyte. Aqueous KOH electrolyte enhances the sensor’s performance in terms of accuracy, stability, repeatability and expected operating sensor life. This sensor ideal for inert gas streams but is not recommended for applications in gas streams containing CO2 gas. Proprietary electrolyte in combination with unique anode structure ensures full utilization of the anode and provides with excellent signal stability. and longer life without signal drift thus minimizes periodic calibration requirement. Sensor is designed, developed and manufactured in the USA.
Applications and guidance
Advanced Sensor Technology
AST-25F3 Oxygen Sensor replaces Figaro KE-25F3. Its a galvanic type micro fuel cell specific to oxygen. SRX-25F3 utilizes aqueous KOH electrolyte instead of acid electrolyte. Aqueous KOH electrolyte enhances the sensor’s performance in terms of accuracy, stability, repeatability and expected operating sensor life. This sensor ideal for inert gas streams but is not recommended for applications in gas streams containing CO2 gas. Proprietary electrolyte in combination with unique anode structure ensures full utilization of the anode and provides with excellent signal stability. and longer life without signal drift thus minimizes periodic calibration requirement. Sensor is designed, developed and manufactured in the USA.
AST Model SRX-25F3 replaces
- FIGARO KE-25F3
Specifications and compatibility references
Application support
Not sure this is the right sensor?
Send the existing sensor or analyzer model and AST will help confirm the correct replacement.



