Rotating machinery protection demands precision, reliability, and real-time responsiveness.

The Bently Nevada 3300 and 3500 series represent industry-standard solutions for vibration monitoring and machinery protection, deployed across power generation, oil & gas, and heavy manufacturing sectors worldwide.

3300 Series: Precision Proximity Measurement

The 3300 series proximity probe systems provide non-contact displacement measurement for critical rotating equipment.

The 3300 XL 8mm Proximity Probe (330191-00-70-50-CN) serves as the cornerstone of this ecosystem, featuring a 5-meter integrated triaxial cable and stainless steel construction weighing 323g.

Operating on -17.5 to -26 VDC power supply, this probe delivers 50Ω output impedance with exceptional signal stability.

For applications requiring extended range, the 330876-02-10-01-00 3300 XL 50mm Proximity Probe offers a linear measurement range of 27.9mm (1100 mils) with an average scale factor of 394 mV/mm (10 mV/mil).

This probe operates effectively from -35°C to +120°C, making it suitable for high-temperature turbine environments.

The system maintains deviation from best fit straight line (DSL) within ±0.74mm under standard conditions and ±2.03mm across the full temperature range.

The 3300 NSv (Narrow Side-view) series, including model 330903-00-12-05-02-05 , addresses space-constrained installations.

With M8x1 threading and 0.5m cable length, this probe achieves 7.87 V/mm scale factor with ±12.5%/-20% accuracy.

Its frequency response spans 0 to 10 kHz, capturing critical vibration signatures across rotating machinery operational spectra.

The probe tip utilizes polyphenylene sulfide (PPS) encapsulation, while the case employs AISI 303/304 stainless steel for corrosion resistance.

Installation specifications require particular attention: maximum thread engagement of 12mm for M8x1 probes, minimum bend radius of 25.4mm (1.0 inch), and recommended torque of finger-tight (0.56 N•m maximum).

Proper gap voltage settings between -8 VDC to -12 VDC ensure linear output and optimal signal quality.

3500 Series: Integrated Machinery Protection System

The Bently Nevada 3500 Series Machinery Protection System represents the seventh generation of monitoring platforms, with over 85,000 installations globally. This modular rack-based system provides continuous online monitoring fully compliant with API 670 standards for machinery protection systems.

System architecture centers on the 3500/05 Instrument Rack, accommodating up to 28 monitoring channels per standard configuration.

The 3500/22M Transient Data Interface Module provides Ethernet connectivity for seamless integration with condition monitoring software, eliminating bulky external modules.

Power supply redundancy through dual 3500/15 units ensures uninterrupted protection capability.

The 3500/32 125712-01 Relay Module delivers four independent channels with DPDT relay outputs, supporting 250 VAC/30 VDC at 5A contact capacity.

Response times of 10ms enable rapid protective actions. Each channel supports independent programming of alarm logic using AND/OR configurations, with LED indicators for OK status, communication activity, and alarm states.

For overspeed protection applications, the 3500/53 133388-01 Electronic Overspeed Detection System provides redundant tachometer functionality compliant with API 670 and API 612 requirements.

This module accepts proximity probe or magnetic pickup inputs ranging from +10.0V to -24.0V, with 20kΩ input impedance.

Power consumption remains efficient at 8.0 watts typical, while recorder outputs provide 4-20mA signals proportional to RPM measurements.

Environmental specifications demonstrate industrial robustness: operating temperatures from -30°C to +65°C, storage from -40°C to +85°C, and IP65 ingress protection.

The system withstands vibration levels up to 8G, ensuring reliability in harsh industrial environments.

Integration and Compliance

The 3500 series achieves comprehensive regulatory compliance including API 670, API 618 for reciprocating compressors, DNV and Class NK maritime certifications, and SIL 2 functional safety ratings.

CE, CSA, FM, ATEX, and IECEx approvals enable global deployment across hazardous area classifications.

Communication capabilities include Modbus TCP/IP and serial protocols, OPC DA and OPC UA interfaces, supporting data transfer rates up to 100 Mbps.

Integration with System 1® software enables predictive maintenance strategies, with documented reductions in unplanned downtime up to 40% and MTBF extensions of 30%.

Technical Specifications Summary

Conclusion

The Bently Nevada 3300 and 3500 series provide comprehensive protection for critical rotating machinery through precision measurement and intelligent monitoring.

From the 330104-00-02-10-02-00 proximity probe with M10x1 threading to the fully integrated 3500 rack system, these solutions deliver the accuracy, reliability, and compliance required for modern industrial operations.

For technical specifications, procurement inquiries, or application support, contact: Amikon Limited Sales Manager: May Email: sales5@amikon.cn