Description
The Bently Nevada 330780-50-00 is a specialized 3300 XL NSv (Narrow System vent) Proximitor sensor. Unlike standard 8mm systems, the NSv line is specifically designed for applications where space is extremely limited or where the target shaft is significantly smaller than the probe diameter. This unit is calibrated for a 5.0-meter total system length and features panel mounting (without a DIN rail base).
Procurement managers often source the NSv series for small centrifugal compressors, pumps, and motors that require a smaller probe footprint than the standard 3300 XL 8mm probes. We maintain inventory of these units to ensure that specialized monitoring systems can be serviced without the typical 12–16 week factory lead times.
Inventory and Commercial Terms
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Item Condition: New Original (Factory Sealed / New Surplus)
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Availability: In stock; ready for immediate international dispatch
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Warranty Coverage: 12-month replacement warranty
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Pricing Notice: The listed price is for reference. Final transaction costs fluctuate based on global supply chain availability and order volume. Contact our trade desk for a formal quote.
Part Number Configuration Breakdown
The 330780 series is the NSv-specific equivalent to the 330180 series. Ensuring the dash-numbers match your system architecture is critical for signal linearity.
| Code | Option | Technical Definition |
| 330780 | Model | 3300 XL NSv Proximitor Sensor |
| -50 | Total Length | 5.0 meters (16.4 feet) |
| -00 | Mounting | Panel Mount (Includes standard base, no DIN rail hardware) |
Technical Specifications
Parameter Value
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Manufacturer Bently Nevada (Baker Hughes)
System Compatibility 3300 XL NSv Probe + Extension Cable (Total 5m)
Output Scale Factor 7.87 V/mm (200 mV/mil)
Power Supply Input -17.5 V DC to -26 V DC (typically -24 V DC)
Linear Range 1.5 mm (60 mils)
Operating Temperature -51 °C to +100 °C (-60 °F to +212 °F)
Connector Type Gold-plated coaxial ClickLoc
Target Material AISI 4140 steel (standard calibration)
Operational Insights & Field Application
How does the NSv system differ from the standard 3300 XL in the field? In field deployments on small high-speed gearboxes, we have observed that the 330780-50-00 handles “side-viewing” scenarios much better than standard probes. If your probe must be mounted close to a side wall or another probe, the NSv’s narrower magnetic field prevents the “crosstalk” interference that often plagues larger sensors.
The panel mount (-00 option) is actually clever for legacy cabinets where you are replacing old 7200 series hardware. Since it doesn’t have the bulky DIN rail clip, it sits flatter against the backplane, allowing for more compact vertical stacking.
Well, technically it provides the same 200 mV/mil scale factor as the 8mm system, but the linear range is shorter (60 mils vs 80 mils). This is a critical design choice—if you try to gap an NSv probe at the same depth you gap a standard 8mm probe, you will likely be sitting right on the edge of the non-linear zone.
In my experience, the most common installation error with the NSv system is using a standard 8mm extension cable. Honestly, check the cable markings; NSv cables have a different characteristic impedance. If you mix them, your vibration readings will be jittery, and your monitor rack will likely flag an OK fault because the oscillator can’t stabilize.
Global Trade, Shipping, and Logistics Optimization
Exporting high-precision Bently Nevada hardware requires a logistics partner who understands the nuances of international trade compliance.
Export Controls and Customs Documentation
We handle the complexities of AES filings and trade screening. This module is classified under HS Code 9031.80.80. For shipments to Southeast Asia or the Middle East, we provide a full document suite—Commercial Invoice, Packing List, and Certificate of Origin (COO)—to ensure the shipment clears customs without being held for “valuation verification” or “technical audit.”
Logistics and Transit
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Protection: Every Proximitor is vacuum-sealed in an ESD-shielded bag. We over-box with anti-static foam inserts to withstand the rigors of international air freight and local courier handling.
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Air Freight: We exclusively utilize DHL Express and FedEx International Priority. Given the high-value, low-weight nature of these sensors, air freight is the only way to minimize transit risk and moisture exposure.
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Incoterms: We standardly operate on FCA (Free Carrier) or CIP (Carriage and Insurance Paid to).
Trade Finance
To secure your procurement, we accept Telegraphic Transfer (T/T). For urgent repair situations, we can often initiate shipping as soon as we receive a bank-stamped SWIFT confirmation to get your machine back in service.
Frequently Asked Questions
Can I use a 330780-50-00 with a standard 8mm probe?
No. The 330780-50-00 is tuned specifically for the NSv probe tip. Using it with a larger 8mm probe will result in a completely inaccurate scale factor and will void the machinery protection certification.
What happens if I need DIN rail mounting for this -00 model?
You can purchase a separate DIN rail adapter plate (Bently Nevada part number 138492-01), which allows the panel-mount base to clip onto a standard 35mm rail. However, it is usually more cost-effective to buy the -01 or -02 version if rail mounting is required.
Is this unit compatible with a 3300 XL 9-meter cable?
No. The “50” in the part number indicates it is calibrated for a 5.0-meter system. Connecting it to a 9-meter cable will cause the internal oscillator to fault, and the output will likely saturate at the supply voltage.
