API 670-Compliant Piezoelectric Accelerometer for Continuous Machinery Vibration Monitoring
The Bently Nevada 330400-02-05 Accelerometer Acceleration Transducer is a three-wire piezoelectric accelerometer designed for continuous monitoring of machine casing vibration on critical rotating equipment. As part of the 330400/330425 Accelerometer Series, it provides reliable acceleration measurements for machinery protection and condition monitoring applications, including turbines, compressors, motors, pumps, and gearboxes. The sensor features a 100 mV/g sensitivity, 50 g peak measurement range, and complies with API Standard 670 requirements. (Baker Hughes Datasheet – 330400 & 330425 Accelerometers)
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330400-02-05 |
| Product Type | Accelerometer Acceleration Transducer |
| Series | 330400 Accelerometer Series |
| Sensor Technology | Three-wire piezoelectric |
| Sensitivity | 100 mV/g (±5%) |
| Measurement Range | 50 g peak |
| Frequency Response | 10 Hz to 15 kHz |
| Supply Voltage | -24 VDC nominal |
| Output | Voltage proportional to acceleration |
| Mounting Thread | M8 × 1 integral mounting stud |
| Housing Material | Stainless steel |
| Hazardous Area Approval | 05 – Multiple Approvals (CSA, ATEX, IECEx) |
| Environmental Rating | Industrial duty |
Typical Applications
The 330400-02-05 is commonly installed on:
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Pumps
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Electric motors
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Gearboxes
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Fans and blowers
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Generators
Typical monitoring functions include:
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Casing vibration monitoring
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Bearing housing vibration measurement
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Gear mesh analysis
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Structural vibration monitoring
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Machinery protection systems
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Predictive maintenance
Key Features
API 670 Compliance
The 330400 series is designed to meet the requirements of API Standard 670, making it suitable for critical rotating machinery protection and monitoring systems.
High Sensitivity
The accelerometer provides 100 mV/g sensitivity over a 50 g peak operating range, enabling accurate detection of both normal vibration levels and abnormal machine conditions.
Wide Frequency Response
With a usable frequency range of 10 Hz to 15 kHz, the sensor captures both low-frequency machine vibration and higher-frequency bearing and gear-related events.
Rugged Stainless Steel Construction
The stainless-steel housing provides excellent resistance to corrosion, oil, moisture, and harsh industrial environments, ensuring long-term reliability.
Metric Mounting Configuration
This model is equipped with an M8 × 1 integral mounting stud, making it suitable for machinery designed with metric mounting hardware.
Hazardous Area Certification
The 05 option includes CSA, ATEX, and IECEx approvals, allowing installation in certified hazardous locations when installed according to the applicable standards.
Frequently Asked Questions
1. What is the primary purpose of the 330400-02-05?
It measures machine casing acceleration for vibration monitoring, machinery protection, and predictive maintenance.
2. What is the difference between 330400-02-00 and 330400-02-05?
Both models have the same M8 × 1 mounting stud and identical measurement performance. The difference is:
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330400-02-00 – No hazardous-area approvals
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330400-02-05 – Includes CSA, ATEX, and IECEx hazardous-area certifications
3. What is the sensor sensitivity?
The sensor has a nominal sensitivity of 100 mV/g (±5%).
4. What is the operating frequency range?
The frequency response is 10 Hz to 15 kHz, suitable for a wide range of machinery vibration applications.
5. What power supply is required?
The accelerometer operates with a -24 VDC nominal power supply.
6. Which industries commonly use this sensor?
Typical industries include:
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Oil & Gas
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Power Generation
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Petrochemical
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Mining
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Marine
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Pulp & Paper
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General Industrial Manufacturing
7. Is this sensor suitable for hazardous locations?
Yes. The -05 approval option includes CSA, ATEX, and IECEx certifications for approved hazardous-area installations.
8. Is it compatible with API 670 monitoring systems?
Yes. The 330400 series is designed for compatibility with API 670 machinery protection systems.
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