Description
When diagnosing tight-clearance turbomachinery like turbochargers, small pumps, or radial compressors, choosing the correct loop calibration length is critical to avoid catastrophic target-tracking errors. The Bently Nevada 330905-00-18-05-02-05 is a 3300 NSv (Narrow System vent) Proximitor Sensor built for specialized setups where a standard 8mm probe tip is physically too large for the machine casing. This device conditions the RF signal traveling to the probe and translates the gap variations into a clean, linear voltage signal that your rack monitors interpret as shaft vibration or axial thrust.
We maintain stock of this exact model configuration for immediate delivery to industrial facilities worldwide.
Model Number Breakdown (Configuration Specs)
Before replacing an existing module, verify that your loop matches this specific alphanumeric configuration sequence:
- 330905: 3300 NSv Proximitor Sensor Series
- -00: Total Length / Mounting Option (Panel Mount / No DIN rail hardware)
- -18: Total System Length (1.8 meters / 6.0 feet)
- -05: Mounting Option (Standard panel mount style)
- -02: Agency Approval Option (ATEX / IECEx / CSA Intrinsic Safety & Non-Incendive certifications)
- -05: Hardware Option (Standard multi-language documentation included)
Commercial Availability & Logistics Terms
- Condition: New Original, Factory Sealed (with unbroken OEM traceability labels)
- Availability: In Stock
- Global Lead Time: Prepared for international carrier collection in 1–3 business days
- Warranty Support: 12-month complete functional warranty
- Pricing Protocol: The commercial price displayed on this portal is a baseline market reference. Final transaction pricing varies according to regional customs duties, bulk packaging requests, and spot market supply. Request a formal quotation for localized binding pricing.
Technical Specifications
| Parameter | Value |
| System Compatibility | 3300 NSv Proximity Transducer System |
| Output Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Linear Range | 0.25 to 1.78 mm (10 to 70 mils) |
| System Length Calibration | Exactly 1.8 meters (Probe + Extension Cable) |
| Supply Voltage Range | −17.5 V DC to −26 V DC (nominal −24 V DC) |
| Current Draw | Less than 12 mA |
| Operating Temperature | −51 to +100 °C |
| Enclosure Material | A380 Aluminum (corrosion-resistant coating) |
| Net Weight | 0.25 kg |
Field Operational Insights & Installation Rules
On a recent machinery turnaround, a plant instrument tech ran into major calibration issues by blindly matching this sensor with a standard 5.0-meter probe assembly. Don’t make that mistake. The “-18” option specifies that this Proximitor is tuned strictly for a 1.8-meter total loop length. If the combined length of your proximity probe and extension cable deviates from 1.8 meters, your scale factor will drift wildly away from the nominal 200 mV/mil specification, rendering your machine protection system useless.
The “-02” suffix marks this unit as hazardous-area certified. When completing field swaps inside an intrinsically safe or non-incendive enclosure, double-check that your terminal block wiring preserves the isolated nature of the coaxial ClickLoc connector. This design choice is actually quite clever—keeping the coaxial shield isolated from the aluminum chassis housing prevents pesky ground loop currents from injecting noise into the 3500/20 rack monitor system. Before turning the system back over to operations, verify the raw gap voltage outputs with a voltmeter; it should rest neatly in the middle of the linear range (around −10 V DC for a normal gap setup).
Global Trade, Shipping, and Customs Compliance
Global trade done right creates competitive advantage. Smooth border clearance relies on strict regulatory documentation, avoiding costly freight delays.
- HS Code Classification: This sensor is internationally coded under HS 9031.80.80 (Other measuring or checking instruments, appliances, and machines).
- Export Control & Trade Laws: Because these sensors monitor high-value critical assets, they are cross-screened against standard global embargo lists. The asset carries an EAR99 rating under standard trade controls.
- Incoterms & Freight Handlers: Transacted under standard EXW (Ex Works) or CIP (Carriage and Insurance Paid to) frameworks. Our export desk relies on DHL Express, FedEx, and UPS to streamline clearances through international customs hubs with precise weights provided in kg.
Frequently Asked Questions
Can I use a 3300 NSv Proximitor with a standard 3300 XL 5mm probe?
No. The NSv system uses a distinct target-size calibration curve and RF frequency configuration that differs from the standard 3300 XL series. Attempting to mix an NSv sensor with an XL probe will throw off your voltage outputs entirely. Always keep the entire loop within the NSv family.
What happens if my probe and cable combined measure 2.5 meters instead of 1.8 meters?
Well, technically the sensor will still output a voltage, but your calibration scale factor will be corrupted. You will no longer get the correct 200 mV/mil reading, which means your monitor rack will display false vibration levels and could cause a false plant trip. Always match a “-18” sensor with a 1.8-meter hardware loop.
What specific rotating machine or bearing housing layout are you installing this 1.8-meter Proximitor onto? If you have an urgent plant shutdown or need specific customs paperwork prepared for your region, let me know your parameters below.
