Product Overview
The Bently Nevada 330903-00-05-05-11-00 is a precision 3300 NSv proximity probe engineered for reliable vibration and position measurement in critical rotating machinery. As part of the trusted 3300 series, this Industrial Automation Module delivers accurate, repeatable data for predictive maintenance and machine protection. With its M8X1 thread, 0.5-meter total length, and FluidLoc cable, the 330903-00-05-05-11-00 is ready for demanding process compressor and turbomachinery applications.
Technical Specifications
The 330903-00-05-05-11-00 offers a comprehensive set of performance parameters that ensure dependable operation in harsh environments.
| Parameter |
Value |
| Probe dc Resistance (0.5 m length) |
4.0 ± 0.5 ohms |
| Extension Cable dc Resistance (center conductor) |
0.220 Ω/m (0.067 Ω/ft) |
| Extension Cable capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +12.5%/-20% |
| Deviation from Best Fit Straight Line (DSL) |
Less than ±0.06 mm (±2.3 mils) |
| Frequency Response |
0 to 10 kHz: +0, -3 dB typical |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable |
75 Ω coaxial, FEP insulated, 0.5 m length |
| Maximum Torque |
0.56 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
M8X1, maximum thread engagement 12 mm |
Key Features & Benefits
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Chemical Resistance: The NSv probe offers increased chemical resistance compared to the previous 3300 RAM probe, making it ideal for process compressor applications.
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Interchangeability: Mechanically and electrically compatible with Bently Nevada’s previous 3300 RAM probe and extension cable, simplifying upgrades.
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Superior Side-View Characteristics: Outperforms the 3000-series 190 probe when gapping at the same distance from the target.
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Robust Construction: AISI 304 stainless steel case and PPS tip withstand harsh conditions.
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Long Cable Runs: Supports up to 305 meters (1000 feet) of field wiring between the Proximitor Sensor and monitor.
Industry Applications
The 330903-00-05-05-11-00 is designed for vibration and position monitoring in rotating equipment. Typical applications include:
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Process Compressors: Chemical resistance and reliable performance make it suitable for aggressive media environments.
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Turbomachinery: Accurate shaft vibration and axial position measurements help prevent catastrophic failures.
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Pumps and Motors: Continuous monitoring enables condition-based maintenance and reduces unplanned downtime.
Installation & Setup Guidance
For optimal performance, mount the probe with the recommended torque (finger tight, maximum 0.56 N·m). Ensure the target surface is clean and the gap is set to 1.0 mm (40 mils) within the linear range. Maintain a minimum bend radius of 25.4 mm for the cable to avoid damage. Use the recommended three-conductor shielded triad cable for field wiring, keeping total length within 305 meters to preserve signal integrity.
Maintenance & Reliability
The rugged design of the 330903-00-05-05-11-00 minimizes maintenance needs. Periodically inspect the probe tip and cable for wear or chemical damage. Verify the connector torque periodically (5.1 N·m recommended for M8X1 cases). The wide operating temperature range and stainless steel construction ensure long service life, reducing total cost of ownership.
Buying Guide
When ordering the Bently Nevada 330903-00-05-05-11-00, verify the exact configuration: M8X1 thread, 0.5-meter cable, and FluidLoc connector. This unit is supplied new in factory packing with a 12-month warranty. For volume pricing or application support, contact PLC Source PRO for a quick quote.