30000-00-12-18-02 is a factory pre-calibrated flush-type eddy-current proximity probe of Bently Nevada 30000 series, manufactured in compliance with API670 international standard for turbomachinery supervisory instrumentation and rotating equipment protection systems. Paired with factory-certified matched extension cable and compatible proximitor transducer, the probe constitutes a complete closed-loop non-contact displacement measurement circuit based on eddy-current induction principle. It converts real-time clearance variation between flush sensing end face and metallic rotor surface into stable linear DC voltage output to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. This sensing device is widely applied on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers across thermal power generation, petrochemical refining and heavy metallurgy industries. Every finished probe passes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging test and connector sealing durability verification before delivery, ensuring consistent measuring accuracy under harsh industrial conditions with severe temperature fluctuation, dense lubricant mist and complex electromagnetic interference. All analog output signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to activate pre-alarm and emergency trip interlock and avoid severe mechanical faults caused by excessive rotor offset and over-limit vibration.