Description
Bently Nevada 330400-01-CN is a high-frequency piezoelectric accelerometer designed to monitor structural casing vibration. It is primarily utilized on critical industrial machinery equipped with rolling-element bearings—such as industrial gearboxes, centrifugal pumps, and high-speed fans—where detecting high-frequency acoustic emissions provides an early warning of mechanical breakdown long before catastrophic failure occurs.
Option Code Breakdown
- 330400: Base Model (3300 XL Accelerometer Transducer)
- 01: Mounting Thread Option (1/4-28 UNF threaded stud base)
- CN: Agency Approval Option (ATEX, IECEx, and regional hazardous area certifications for explosive atmospheres)
Commercial Supply Status
- Condition: New Original (Factory Sealed)
- Availability: In stock
- Lead Time: Ships within 1–2 business days
- Warranty: 12-month standard industrial warranty
- Price Policy: The listed price represents a standard reference benchmark. Because market conditions, factory allocation pools, and compliance verification costs fluctuate, final transaction prices vary. Contact our sales department to receive a firm, negotiable commercial quote.
Technical Parameters
| Parameter | Value |
| Sensitivity | 10.2 mV/m/s² (100 mV/g) ±5% |
| Acceleration Range | 490 m/s² (50 g) peak |
| Frequency Response (±3 dB) | 10 Hz to 15 kHz (600 to 900,000 cpm) |
| Frequency Response (±10%) | 30 Hz to 10 kHz (1,800 to 600,000 cpm) |
| Linear Amplitude | ±1% up to 490 m/s² (50 g) peak |
| Case Material | 316L Stainless Steel |
| Mounting Torque | 4.5 Nm (40 in-lbf) maximum |
| Operating Temperature | −51 to +121°C |
Field Deployment Notes & Insights
During commissioning on a high-speed compressor deck gearbox, installing this 1/4-28 UNF threaded variant required precise surface machining. Well, technically the internal quartz crystal is exceptionally reliable, but if the casing mounting surface exhibits even minor pitting or paint residue, high-frequency stress waves will scatter. Don’t underestimate the necessity of a flat, bare-metal mating surface. Apply a micro-layer of silicone grease during installation to maximize acoustic coupling between the sensor base and the machine skin.
Pay close attention to the mounting torque spec. Exceeding 4.5 Nm when tightening the 1/4-28 stud will permanently stretch the sensor base, altering its internal pre-load and distorting the 100 mV/g sensitivity rating. The top-mounted connection profile requires a 3-wire shielded configuration. Is your monitoring cabinet supplying a true −24 V DC excitation voltage? Verify with the official OEM manual (document 141638) before completing your channel setup. Bottom line—loose mounting hardware mimics high-frequency bearing noise on your trends.
International Shipping & Trade Compliance
Cross-border logistics for specialized vibration sensors used in hazardous zones demands flawless documentation. We classify this transducer under HS Code 90318020 on all international customs declarations. Our trade desk coordinates daily expedited air freight shipments via DHL Express, FedEx, and UPS to support rapid plant turnaround schedules.
Because this unit features the “CN” explosion-proof certification string, physical serial verification and localized compliance paperwork are audited closely at our export bay prior to dispatch. Standard international transactions execute under FCA (Free Carrier) or CIP (Carriage and Insurance Paid to) rules.
Frequently Asked Questions
Can I substitute this 330400-01-CN for a 330400-02-CN model?
The internal sensor electronics are completely identical, but the mounting base differs. The -01 version features a 1/4-28 UNF thread, while the -02 version utilizes an M8 x 1.25 metric thread—meaning you cannot substitute them without drilling and tapping a new hole or utilizing an thread adapter (which degrades high-frequency tracking performance).
What cable assembly matches this accelerometer?
This sensor pairs natively with the Bently Nevada 16710 series armored 3-conductor cable—though your mileage may vary if you attempt to wire third-party unarmored cables inside harsh, oil-misted turbine hoods.
