Description
When tracking absolute structural vibration on a bearing housing or machine casing, picking the wrong mounting configuration can render your diagnostic data useless. The Bently Nevada 330500-02-05 is a rugged, solid-state piezoelectric velocity sensor designed specifically for machines with rolling-element bearings, such as cooling tower fans, pumps, and centrifuges. By utilizing an internal accelerometer element that integrates the signal down to velocity within its hermetically sealed housing, it provides a highly reliable, wear-free alternative to moving-coil velocity pickups.
We actively maintain this exact configuration in our inventory for immediate global shipping.
Model Number Breakdown (Configuration Specs)
To ensure this unit directly matches your existing field deployment and loop design, verify the decoded configuration codes below:
- 330500: Velomitor Piezo-Velocity Sensor Series
- -02: Mounting Thread Adapter Option (Includes a metric M8 × 1 threaded stud adapter)
- -05: Agency Approval Option (Multiple regional hazardous area approvals including ATEX, IECEx, and CSA Intrinsic Safety / Non-Incendive ratings)
Commercial Availability & Logistics Terms
- Condition: New Original, Factory Sealed
- Availability: In Stock
- Standard Lead Time: Ready for international carrier pickup within 1–3 business days
- Warranty Support: 12-month complete functional warranty
- Pricing Protocol: The listed price on this B2B marketplace serves as a baseline market reference. Final transaction pricing is subject to volume requirements, regional import surcharges, and spot market conditions. Contact our trade desk directly for an official quotation.
Technical Specifications
| Parameter | Value |
| Electrical Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% @ 100 Hz |
| Frequency Response | 4.5 Hz to 5 kHz (±3.0 dB); 6.0 Hz to 2.5 kHz (±0.9 dB) |
| Velocity Range | 1,270 mm/s (50 in/s) peak |
| Output Bias Voltage | −12 V DC ±3.0 V DC (referenced to Pin A) |
| Dynamic Output Impedance | Less than 2,400 Ω |
| Operating Temperature | −55 to +121 °C |
| Shock Survivability | 5,000 g peak maximum |
| Case Material Construction | 316L Stainless Steel (Hermetically Sealed) |
| Connector Interface | 2-pin MIL-C-5015 Receptacle |
| Maximum Torque Rating | 4.52 N·m (40 in·lbf) maximum |
| Net Weight | 142 grams (typical, excluding adapter) |
Field Operational Insights & Installation Rules
On a recent overhaul of a boiler feed pump, the field team encountered erratic 3500 rack alarms because they attempted to integrate the 330500’s velocity output down to displacement values in the monitor configuration. Don’t do this. Integrating a piezo-velocity signal a second time amplifies baseline electronic noise and creates massive calibration drift. Keep the monitoring loop configured strictly for velocity (mm/s or in/s).
Well, technically the solid-state architecture allows you to mount this sensor at any orientation—vertically, horizontally, or at an angle—without losing accuracy. However, the physical mounting plane must be spot-faced flat. If the casing face is unmachined or pitted, the wide 15/16-inch hexagonal base of the Velomitor will flex the internal sensor crystal when torqued down, introducing false low-frequency signals. To be frank, always wipe the threads clean and tighten the sensor using the included M8 × 1 adapter to exactly 4.52 N·m; over-torquing will permanently damage the internal insulation barrier.
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 330500 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 330500 body itself is a 3/8-24 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 replace the M8 stud with an individual 1/4-28 adapter stud (Bently Nevada part number 89411-01).
What cable assembly should be paired with the 2-pin MIL-C-5015 connector?
We recommend the standard Bently Nevada 9571 series two-conductor twisted, shielded cable with a moisture-resistant female connector. 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 interference.
What specific machine asset or bearing casing are you preparing to mount this Velomitor 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.
