Description
When measuring high-frequency structural vibration, such as casing acceleration on gearboxes, rolling-element bearings, or high-speed compressor casings, selecting the proper mounting profile is critical to prevent signal clipping. The Bently Nevada 330400-02-05 is a high-performance piezoelectric accelerometer engineered to output a clean, continuous voltage proportional to absolute acceleration. This allows your monitoring systems to detect early-stage bearing degradation, blade pass frequencies, and mechanical looseness before catastrophic machine damage occurs.
We actively maintain this precise configuration in our inventory, fully prepared for immediate international dispatch.
Model Number Breakdown (Configuration Specs)
To verify that this item matches your field replacement specifications, review the option codes parsed from the part number sequence:
- 330400: 3300 XL Accelerometer Sensor Series
- -02: Mounting Thread Adapter Option (Includes a metric M8 × 1 threaded stud adapter)
- -05: Agency Approval Option (Multiple regional hazardous area certifications including ATEX, IECEx, and CSA Intrinsic Safety / Non-Incendive ratings)
Commercial Availability & Logistics Terms
- Condition: New Original, Factory Sealed (with unbroken OEM traceability labels)
- Availability: In Stock
- Standard Lead Time: 1–3 business days for global shipping processing
- Warranty Support: 12-month complete functional warranty
- Pricing Protocol: The commercial price displayed on this portal serves as a baseline market reference. Final pro forma invoices are open to volume negotiations and regional freight adjustments. Request a formal quote for firm pricing.
Technical Specifications
| Parameter | Value |
| Electrical Sensitivity | 10.2 mV/m/s² (100 mV/g) ±5% |
| Frequency Response | 10 Hz to 15 kHz (±3.0 dB); 30 Hz to 10 kHz (±0.9 dB) |
| Acceleration Range | 785 m/s² (80 g) peak maximum |
| Output Bias Voltage | −12 V DC nominal (referenced to Pin A) |
| Excitation Current Required | 2 mA to 10 mA (constant current) |
| Operating Temperature | −55 to +121 °C |
| Resonant Frequency | Greater than 30 kHz |
| Case Material Construction | 316L Stainless Steel (Hermetically Sealed) |
| Connector Interface | 3-pin MIL-C-5015 Receptacle |
| Net Shipping Weight | 0.20 kg |
Field Operational Insights & Installation Rules
On a recent commissioning of an overhung centrifugal compressor, the field crew encountered severe signal saturation. The root cause was simple—they did not prep the casing surface correctly. The wide hexagonal base of the 330400 requires a spot-faced surface finished flat to within 0.02 mm. If the casing face is unmachined, pitted, or has a stray speck of rust beneath the 1-3/8 inch hex seat, the high-frequency resonant frequency of the sensor shifts downward, causing major signal distortion.
Well, technically this is a 3-wire accelerometer (requiring Power, Common, and Signal lines), which differentiates it from standard 2-wire loops. Do not attempt to route this into a 3500 rack monitor card configured for a 2-wire Velomitor sensor, or the internal amplifier will stay unpowered. To be frank, always wipe the casing threads clean and torque the sensor via the included M8 × 1 adapter to exactly 4.52 N·m. Over-torquing or under-torquing will permanently damage the internal insulation barrier or corrupt your high-frequency diagnostic data.
Global Trade, Shipping, and Customs Compliance
Global trade done right creates competitive advantage. Sourcing critical monitoring hardware requires strict adherence to international trade guidelines to minimize transit disruptions.
- HS Code Classification: This sensor is classified globally under HS Code 9031.80.80 (Other measuring or checking instruments, appliances, and machines).
- Export Control & Trade Laws: Due to its utilization in heavy industrial power generation and petrochemical sectors, the 330400 is screened against standard international denied-party lists and carries an EAR99 control classification.
- Incoterms & Express Logistics: Standard shipping terms are processed via EXW (Ex Works) or CIP (Carriage and Insurance Paid to destination). We package the sensors inside custom-molded ESD-safe packing materials to protect the delicate piezoelectric elements from transit shocks via DHL Express, FedEx, or UPS.
Frequently Asked Questions
Can I run this sensor without the M8 × 1 adapter if my machine casing is tapped for 1/4-28 threads?
The underlying base thread of the 330400 body itself is a 1/4-28 UNF fine thread hole. The “-02” option simply specifies that an M8 × 1 adapter stud is packaged with it. If you need to mount this to a 1/4-28 tapped hole in the future, you do not need a new sensor—you can simply unscrew the M8 stud and use a standard 1/4-28 to 1/4-28 grub screw stud.
What cable assembly should be paired with the 3-pin MIL-C-5015 connector?
We recommend the standard Bently Nevada 3-wire twisted, shielded cable assembly (such as the 16925 series). Ensure that the cable shield drain wire is landed exclusively at the instrument clean ground rail in your monitor cabinet and left completely floating on the sensor end to eliminate ground loop noise.
What specific asset (e.g., gearbox, high-speed motor, or compressor casing) are you preparing to mount this 100 mV/g accelerometer onto? If you are working against an immediate plant shutdown deadline or need localized trade compliance paperwork prepared for your region, share your project requirements below.
