Bently Nevada 330400-01-00 Accelerometer
A 100 mV/g casing-acceleration transducer with an integral 1/4-28 UNF stud and no agency-approval option.
Key Information
330400-01-00 is a Bently Nevada 330400 acceleration transducer for critical machinery casing measurements, including gear-mesh monitoring. The 330400 platform is designed around API 670 accelerometer requirements and provides a 100 mV/g nominal sensitivity.
Its order code identifies the integral 1/4-28 UNF mounting stud and the no-approval configuration. This exact mechanical and approval identity should be retained when replacing a validated installation.
Functions
- Converts machine-casing acceleration into a conditioned voltage signal for monitoring equipment.
- Supports high-frequency casing vibration and gear-mesh observation across the documented bandwidth.
- Maintains case isolation and uses a three-pin MIL-C-5015 receptacle for the interconnect cable.
- Provides an API-oriented 100 mV/g measurement range for machinery protection applications.
Specifications
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Model | 330400-01-00 |
| Sensitivity | 100 mV/g ±5% |
| Peak Acceleration Range | 50 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 50 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 |
| Sensor Ingress Rating | Equivalent to IP68 |
Installation
- Machine the mounting surface to the required finish and torque 330400-01-00 to 4.1 N·m on a compatible 1/4-28 location.
- Mount on the bearing housing or machine casing where rotor vibration is transmitted reliably to the structure.
- Use a compatible three-conductor shielded cable and preserve case isolation, grounding and conduit protection.
- Verify bias voltage, polarity and monitor scaling before accepting the acceleration channel.
Lifecycle
- Retain the -01-00 suffix because it defines both the 1/4-28 stud and the absence of agency approvals.
- Trend bias voltage and baseline vibration so cable or sensor degradation can be distinguished from machine change.
- If hazardous-area certification becomes necessary, evaluate a -05 approval option and the complete loop design.
FAQ
What does the -01-00 suffix mean on 330400-01-00?
The 01 option specifies an integral 1/4-28 UNF stud and 00 specifies no agency approvals.
Can 330400-01-00 replace a 330425 accelerometer without changes?
No. Their sensitivities and ranges differ, so monitor scaling, alarm settings and the measurement objective must be reviewed.
Which cable is required for 330400-01-00?
Use a compatible three-conductor shielded cable with the correct three-socket mating connector, length and environmental protection.
What mounting issue most affects 330400-01-00 data quality?
A poor or flexible mounting surface can attenuate high-frequency response or create signals that do not represent casing vibration.
What should be checked after installing 330400-01-00?
Confirm mounting torque, cable routing, bias voltage, channel polarity, sensitivity scaling and a credible baseline vibration reading.
