Description
Bently Nevada 330400-02-CN is a heavy-duty piezoelectric accelerometer engineered to measure high-frequency casing vibration. It is primarily deployed on critical rotating assets with rolling-element bearings, such as gearboxes, high-speed pumps, and compressors, where tracking casing acceleration provides early warnings of bearing degradation and gear mesh defects.
Option Code Breakdown
- 330400: Base Model (3300 XL Accelerometer Transducer)
- 02: Mounting Thread Option (M8 x 1.25 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 distributor reference benchmark. Because international supply chains, precious-metal components, and hazardous-area certification processing cause market rates to fluctuate, final pricing is negotiable. Contact our sales department to receive a firm commercial quote.
Technical Parameters
| Parameter | Value |
| Sensitivity | 10.2 mV/m/s² (100 mV/g) ±5% |
| Acceleration Range | 490 m/s² (50 g) peak |
| Amplitude Linearity | ±1% to 490 m/s² (50 g) peak |
| Frequency Range (±3 dB) | 10 Hz to 15 kHz (600 to 900,000 cpm) |
| Frequency Range (±10%) | 30 Hz to 10 kHz (1,800 to 600,000 cpm) |
| Resonant Frequency | >30 kHz |
| Case Material | 316L Stainless Steel |
| Operating Temperature | −51 to +121°C |
Field Deployment Notes & Insights
During structural retrofits on an axial air compressor casing, installing this M8-threaded accelerometer required meticulous surface preparation. Well, technically the internal piezoelectric crystal is highly stable, but if the machine mounting surface isn’t milled flat and free of paint or rust, the transmission of high-frequency micro-vibrations drops drastically. Don’t underestimate the importance of using a light coating of silicone grease on the mounting surface to maximize acoustic coupling.
Pay close attention to the tightening torque. Over-torquing the M8 base stud past the manufacturer specification can distort the internal sensor element, permanently throwing off the 100 mV/g sensitivity factor. The electrical interface relies on a top-mounted 3-pin connector. Is your local termination box routed with a matching 3-wire shielded cable like the 16710 series? Verify with the official OEM datasheet (document 141638) before powering up the channel. Bottom line—proper mechanical torque prevents signal clipping at high frequencies.
International Shipping & Trade Compliance
Cross-border logistics for hazardous-area certified instrumentation requires absolute accuracy on all shipping manifests. We classify this accelerometer under HS Code 90318020 for global customs reporting. Our trade coordinators manage daily expedited air freight shipments via premium carriers (DHL, FedEx) to minimize international transit delays.
Because this specific unit features the “CN” multi-agency explosion-proof suffix, the localized compliance certificates are audited against the physical serial plates at our outbound warehouse. Standard international shipments operate under FCA (Free Carrier) or CIP (Carriage and Insurance Paid to) trade rules.
Frequently Asked Questions
Can I use this sensor on a standard 2-wire constant-current monitor loop?
No. The 330400 is a 3-wire accelerometer that requires a dedicated −24 V DC power supply line, a common ground reference, and a separate signal output line—though your mileage may vary if you are using specialized third-party barrier modules designed to convert signals.
What is the difference between this model and the 330425 accelerometer?
The 330400 has a higher resonant frequency and is optimized for general-purpose high-frequency tracking up to 50 g, whereas the 330425 is specifically tailored for low-frequency peak-acceleration applications, such as slow-speed gear mesh anomalies.
