Bently Nevada 125720-01 Proximitor Sensor

The Bently Nevada 125720-01 is a non-contact proximitor sensor used with eddy current probes. It converts the clearance variation between probe and rotating shaft into continuous voltage signal for shaft vibration, position and thrust measurement on rotating machinery.

This sensor is widely applied in turbine, compressor and pump condition monitoring systems. It is commonly stocked as spare parts for equipment overhaul and online monitoring system maintenance in power, oil & gas and petrochemical plants.

Main Specifications

• Brand: Bently Nevada; Model: 125720-01; Type: Proximitor Sensor
• Applicable System: 3500 series machinery condition monitoring system
• Core Tasks: Eddy current signal processing, gap conversion, linear voltage output, probe fault detection
• Signal Interface: Probe cable interface, signal output terminal, DC power input
• Installation: Cabinet mounting inside machinery monitoring rack
• Matched Device: Eddy current probe and extension cable
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
• Certifications: CE, compliant with rotating machinery monitoring EMC and safety standards

Core Functions

• Supply high-frequency excitation signal to eddy current probe and process feedback signal to measure metal surface clearance.
• Output linear analog voltage signal proportional to shaft clearance for vibration, axial thrust and eccentricity monitoring.
• Detect probe cable open or short circuit faults and send fault status to the 3500 monitoring rack for alarm processing.
• Work with 3500 series monitoring modules to realize real-time online protection and early warning of rotating equipment.
• Compact design facilitates centralized installation inside monitoring cabinets and convenient on-site calibration.
• Stable circuit design ensures long-term continuous measurement for critical rotating equipment.

Application Scenarios

• Spare-part replacement for Bently Nevada 3500 monitoring systems in power plants, oil refineries and chemical factories.
• Non-contact measurement hardware for steam turbines, gas turbines, centrifugal compressors and large water pumps.
• Maintenance backup inventory for overhaul and after-sales maintenance projects of rotating machinery protection systems.
• Matching proximitor cooperating with eddy current probes, extension cables and 3500 monitoring modules.
• Retrofit replacement for aged sensors with signal drift, linearity failure and cable fault detection abnormality.

• Global aftermarket spare supply for automation maintenance teams maintaining rotating machinery protection equipment worldwide.