Bently Nevada 330100-90-05 Product Description
1. Product Overview
The Bently Nevada 330100-90-05 is a Proximitor Sensor belonging to the 3300 XL series manufactured by Bently Nevada, a subsidiary of Baker Hughes. Complying with API 670 standards, it serves as a dedicated signal conditioning unit for 8 mm eddy-current proximity probes and a core component of rotating machinery condition monitoring systems. This device supplies high-frequency excitation current to the matched probe, converts the impedance variation detected by the probe into linear negative voltage analog signals. It is widely deployed in power generation, petrochemical, metallurgy and other industries, applied to online monitoring and safety protection for critical equipment such as steam turbines, gas turbines, generators and centrifugal compressors, to measure shaft vibration, axial displacement, shaft eccentricity and Keyphasor speed signals.
2. Model Number Decoding
330100: Base model, standard 3300 XL Proximitor Sensor designed for 8 mm eddy-current probe systems.
90: The total rated cable length of the whole measurement system is 9.0 meters, suitable for long-distance signal transmission.
05: Version with comprehensive certifications, compliant with mainstream industrial standards for global application.
3. Working Principle
Built on the eddy-current measurement principle, the internal oscillator of the Proximitor Sensor outputs high-frequency alternating current to the coil inside the proximity probe. When the probe approaches a metallic rotating shaft, eddy currents are induced on the shaft surface, which changes the inductance and impedance of the probe coil. The Proximitor captures such electrical changes, processes and linearizes the signals, and outputs stable negative voltage signals proportional to the gap between the probe and the measured shaft. The non-contact measurement mode is immune to oil, water vapor, dust and other contaminants, enabling continuous and reliable long-term operation.
4. Technical Specifications
4.1 Electrical Parameters
Matched probes: 330101, 330102, 330103, 330104 series 8 mm eddy-current proximity probes.
Sensitivity: 7.87 V/mm (200 mV/mil).
Linear measurement range: 2.0 mm; effective working range from 0.25 mm to 2.3 mm.
Output voltage: −1 VDC to −17 VDC. The recommended installation gap is 1.27 mm, corresponding to an output of −9 VDC.
Frequency response: 0 Hz to 10 kHz, covering monitoring requirements for rotating equipment at various speeds.
Power supply: −24 VDC (±10%), maximum power consumption ≤ 2 W.
4.2 Environmental and Mechanical Parameters
Operating temperature of Proximitor: −40°C to +85°C.
Operating temperature of matched probe: −51°C to +177°C.
Ingress protection class: IP65, dust-proof and protected against water jet.
Housing material: Engineering plastic combined with metal base, featuring vibration resistance and corrosion resistance.
Mounting type: Standard DIN rail mounting, applicable to industrial control cabinets.
Weight: Approximately 0.29 kg, compact and easy to install.
4.3 Certifications
Certified with CE, UL and other international approvals, meeting EMC requirements.
Non-explosion-proof design, only for use in ordinary non-hazardous industrial areas.
5. Mechanical Structure & Key Features
5.1 Mechanical Structure
Adopting a compact modular structure, the unit can be directly clipped onto standard DIN rails inside control cabinets for quick installation and removal. It is equipped with dedicated coaxial signal interface for connecting probes and extension cables, as well as terminal blocks for power supply and signal output. The layout of ports is clear for convenient field wiring. Calibrated for a total cable length of 9.0 meters, it achieves excellent impedance matching and minimizes signal transmission loss during long-distance wiring.
5.2 Core Advantages
High precision and stability: Low temperature drift ensures consistent and reliable measurement data during long-term operation.
Strong anti-interference capability: Built-in electromagnetic shielding structure effectively resists EMI and RFI interference generated by frequency converters and high-power motors.
Long-distance transmission support: Calibrated for 9-meter total cable length, ideal for wiring across large equipment and complex cabinet layouts.
Full compatibility and interchangeability: Fully compatible with all 3300 XL series probes and extension cables. No extra matching calibration is required, which reduces spare parts management and maintenance costs.
High industrial reliability: Robust structure and IP65 protection grade enable stable operation under harsh industrial working conditions and extend service life.
6. System Composition & Compatibility
A complete measurement system consists of this Proximitor Sensor, a 3300 XL 8 mm proximity probe and matched 330130 series extension cables. The total length of all connected cables must strictly conform to the rated 9.0 meters of the Proximitor to guarantee measuring accuracy.
This product is fully compatible with Bently Nevada 3300 and 3500 series monitoring racks. The output analog signals can be connected to DCS, PLC and other mainstream industrial control systems to realize real-time data display, alarm activation and equipment safety interlock functions.
7. Typical Applications
Power generation industry: Steam turbines, gas turbines, generators, feed water pumps and other main units and auxiliary equipment.
Oil and gas & chemical industry: Centrifugal compressors, process pumps and other high-speed rotating machinery, applied in non-explosive areas.
Metallurgy and general industry: Large driving motors, fans, gearboxes and various high-speed rotating units for vibration and axial displacement monitoring.
8. Installation & Maintenance Guidelines
8.1 Installation Requirements
Install the device on DIN rails inside control cabinets, and keep it away from heat sources, high-voltage components and strong electromagnetic interference sources. Conduct wiring strictly in accordance with definitions of power terminals, signal output terminals and probe interfaces. Fasten all coaxial connectors and terminal connections tightly to avoid poor contact. Never change the total cable length arbitrarily, and keep the overall cable length at 9.0 meters. Adjust the static gap between the probe and measured shaft to 1.27 mm, and prevent direct contact between the probe and the shaft to avoid damage.
8.2 Daily Maintenance
Perform regular accuracy calibration once a year to maintain measuring performance. Conduct routine inspections to check tightness of connectors, cable integrity and ambient operating temperature. Keep the Proximitor surface clean and remove accumulated dust regularly to ensure proper heat dissipation.
9. Usage Notes
Do not operate the product beyond the rated temperature range. Avoid severe impact and excessive vibration on the device. This model is not explosion-proof, so it is prohibited to use in flammable and explosive hazardous areas. Always use original Bently Nevada matched probes and extension cables; the use of non-original accessories will lead to measurement deviation and system failure. Do not bend cables excessively, and keep the minimum bend radius no less than five times the cable diameter to prevent damage to internal conductors.
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