30000-00-13-18-02 is a factory pre-calibrated flush-type eddy-current proximity probe from Bently Nevada 30000 series, designed and manufactured in accordance with API670 international standard for turbomachinery supervisory instrumentation and rotating machinery protection systems. When matched with factory-certified extension cable and compatible proximitor transducer, the probe forms a complete closed-loop non-contact displacement measurement circuit based on eddy-current induction principle. It converts real-time clearance fluctuations between flush sensing end face and metallic rotor surface into stable linear DC voltage signals to continuously monitor radial shaft vibration, axial thrust displacement and Keyphasor rotational speed. Widely used on critical high-speed rotating equipment including steam turbines, centrifugal compressors, turbo-generator sets, boiler feedwater pumps and industrial blowers within thermal power, petrochemical refining and metallurgical industries. Every finished unit passes full-loop capacitance matching test, wiring continuity inspection, alternating high-low temperature cyclic aging and connector sealing durability test before delivery, ensuring stable measuring accuracy under harsh working conditions with fluctuating ambient temperature, heavy lubricant mist and complex electromagnetic interference. All analog measured signals are transmitted to Bently 3500 monitoring rack, field DCS or PLC control system to activate pre-alarm and emergency trip interlock for preventing severe mechanical damage caused by excessive rotor deflection and out-of-limit vibration.