Bently Nevada 330425-01-00 Accelerometer
A 25 mV/g, 75 g peak casing-acceleration transducer with a 1/4-28 UNF integral stud and no approval option.
Key Information
330425-01-00 is the higher-range member of the Bently Nevada 330400/330425 casing-acceleration family. Its 25 mV/g sensitivity and 75 g peak range suit critical machinery locations where higher acceleration levels are expected.
The exact suffix specifies a 1/4-28 UNF integral mounting stud and no agency approvals. Although its body and interface resemble the 330400, monitor scaling is different and must be verified.
Functions
- Measures casing acceleration for protection and condition-monitoring channels.
- Extends peak measurement range to 75 g for demanding high-frequency machinery locations.
- Supports gear-mesh and structural acceleration measurements across a 10 Hz to 15 kHz ±3 dB response.
- Connects through a case-isolated three-pin MIL-C-5015 receptacle.
Specifications
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Model | 330425-01-00 |
| Sensitivity | 25 mV/g ±5% |
| Peak Acceleration Range | 75 g from 10 Hz to 15 kHz |
| Frequency Response | 10 Hz to 15 kHz ±3 dB; 30 Hz to 10 kHz ±10% |
| Amplitude Linearity | ±1% to 75 g peak |
| Power Input | -24 ±0.5 V DC |
| Bias Current | 2 mA nominal |
| Mounting Thread | Integral 1/4-28 UNF stud |
| Approval Option | None |
| Operating Temperature | -55 to +121 °C |
| Connector | Three-pin MIL-C-5015 receptacle |
Installation
- Prepare a flat, clean mounting surface and torque 330425-01-00 to 4.1 N·m using its 1/4-28 UNF stud.
- Select a casing location that reliably carries the vibration component of interest and document its orientation.
- Protect the cable in conduit where required and keep the mating connector sealed against the environment.
- Configure the monitor channel for 25 mV/g before applying alarm or shutdown settings.
Lifecycle
- Maintain the 330425-01-00 sensitivity and suffix in the spare record; a visually similar 330400 is not a scaling-equivalent substitute.
- Trend sensor bias and signal baseline to support fault isolation during outages.
- If certification requirements change, reassess the full sensor, barrier, cable and monitor loop.
FAQ
Why choose 330425-01-00 instead of a 330400 sensor?
330425-01-00 provides a 75 g peak range with 25 mV/g sensitivity, whereas the 330400 uses 100 mV/g and a 50 g range.
What does -01-00 identify on 330425-01-00?
It identifies the integral 1/4-28 UNF stud and the no-agency-approval version.
Can 330425-01-00 use an existing 330400 channel?
Only after engineering review and rescaling for 25 mV/g, with alarm and shutdown thresholds revalidated.
What installation detail is most important for 330425-01-00?
Use a rigid, properly finished casing surface and the specified 4.1 N·m torque to preserve high-frequency response.
What should be included in a 330425-01-00 quotation request?
Include the full sensor code, mating cable part and length, monitor model, channel configuration and approval requirements.
