Main Products: Japanese Kanagawa Temperature Controller, Japanese Shimaden Temperature Controller, Sim尔顿 Power Regulator, Marathon Oxygen Probe. Specifically for the selection and usage of oxygen probes for the original Marathon (MMI) Carbon King SSI Carburizing Heat Treatment Equipment in Nanjing, here is a summary of key information and recommendations:
1. Core function of the oxygen probe
Function: Real-time monitoring of the furnace carbon potential (CP), by measuring oxygen concentration to reverse calculate the carbon potential, ensuring the accuracy of carburization/carbonitriding process.
Key Parameters: Carbon Potential Control Range (typically 0.1%~1.5% C), Response Time, Accuracy (±0.05% C), Service Life.
2. MMI Carbon King SSI Equipment Compatibility Recommendations
Original Equipment Manufacturer (OEM) Accessories: Preferably use OEM MMI oxygen probes (such as MMI SSO2 series) to ensure compatibility and seamless data communication integration.
Alternative Brand: If a third-party probe is required, please confirm:
Interface Matching: Electrical Interfaces (e.g., M8/M12 connectors), Signal Output Type (mV or Digital Signal).
Range and accuracy: Must cover the carbon potential range required by the process (e.g., 0~1.5% C), with accuracy ≤ ±0.05%.
Certification Standards: Compliant with AMS 2750E or equivalent heat treatment equipment specifications.
3. Recommended Oxygen Sensor Model
Original Factory Options: MMI SSO2 XXX (specific model to be confirmed with MMI technical support).
Third-party options:
Marathon Sensors: OXI Series (e.g., OXI 2000), suitable for high-temperature carburization.
Honeywell: KG series, high stability, supports multi-gas calibration.
Siemens: 7MB series, with self-diagnostic feature.
4. Key Usage and Maintenance Points
Installation Location: Close to the workpiece, avoid dead air zones, and prevent carbon accumulation.
Calibration Frequency: At least one reference gas calibration per week (e.g., carrier gas containing 5% CO, 20%H2).
Common Faults:
Signal Drift: Check reference gas flow rate (usually 1~3L/min) or probe aging.
Carbon Accumulation Blocking: Regularly burn carbon (air burn, introduce air for 10 minutes at 650℃).
Life Span: Typically 12 months ( lifespan may be reduced under high-temperature operating conditions).
