Description
Product Introduction & Engineering Value
The 9200-01-02-02-00 is a Bently Nevada 9200 Series Seismoprobe designed to measure absolute vibration velocity rather than shaft displacement or relative shaft position. Its moving-coil sensing element produces a voltage proportional to vibration velocity, making it suitable for casing and bearing-housing vibration measurements. Available technical references specify a nominal sensitivity of 20 mV/mm/s (500 mV/in/s).
This particular ordering code is configuration-specific. The 01-02-02-00 suffix identifies the mounting-angle, connector, mounting-base, and approval configuration. That matters when replacing an installed sensor because a similar-looking 9200 transducer may have a different mechanical arrangement.
Technical Specifications
| Specification | 9200-01-02-02-00 |
|---|---|
| Manufacturer | Bently Nevada |
| Series | 9200 Seismoprobe |
| Product Type | Two-wire velocity transducer |
| Sensing Principle | Moving-coil velocity sensing |
| Measurement | Absolute structural/casing vibration velocity |
| Nominal Sensitivity | 20 mV/mm/s (500 mV/in/s) |
| Sensitivity Tolerance | ±5% under specified test conditions |
| Frequency Response | 4.5–1,000 Hz, typical |
| Minimum Operating Frequency | 4.5 Hz / 270 cpm |
| Mounting Angle | 0° ±2.5° |
| Connector | Side mount |
| Mounting Base | Circular; 1/4-28 UNF stud |
| Weight | Approximately 0.30 kg |
| External Excitation | Not required for the passive moving-coil sensing element |
The sensitivity and frequency-response figures are reported by technical product references for the 9200 Seismoprobe family. The ordering configuration is independently identified as 01 = 0° ±2.5° / 4.5 Hz, 02 = side-mount connector, 02 = circular 1/4-28 UNF base, 00 = no approvals required.
Field Application & the “Trench” Experience
A vibration engineer troubleshooting a large pump train may see elevated casing vibration without having direct access to the rotating shaft. In that situation, a casing-mounted velocity transducer provides a practical measurement of the machine’s absolute structural vibration.
Imagine a process pump where the vibration trend begins increasing after maintenance. Before changing bearings or realigning the coupling, the engineer checks the casing velocity measurement and compares it with historical readings. If the sensor itself has been disturbed, has a damaged connector, or has been replaced with the wrong mechanical configuration, the apparent machine trend can be misleading.
The 9200-01-02-02-00 is particularly relevant where the existing installation calls for its specific circular-base and side-connector arrangement.
Specific application scenarios
- Centrifugal pump bearing-housing monitoring — casing vibration measurement during continuous machinery surveillance.
- Induced-draft and forced-draft fan monitoring — detection of changes in structural vibration associated with imbalance or mechanical deterioration.
- Gearbox casing vibration measurement — velocity monitoring where casing vibration is the selected machinery-health parameter.
- Motor-driven compressor trains — structural vibration measurement at bearing housings or machine casings.
9200-01-02-02-00
9200-01-02-02-00
Transparency SOP: QA & Testing
For a new-surplus or refurbished 9200-01-02-02-00, the inspection should focus on both the sensing element and the mechanical configuration.
1. Part-number verification
Confirm the complete number 9200-01-02-02-00, not simply “9200.” The suffix defines the physical configuration.
2. Mechanical inspection
Check the circular mounting base, 1/4-28 UNF stud interface, housing, and connector for impact damage or corrosion.
3. Electrical verification
Measure the sensor’s electrical characteristics according to the applicable Bently Nevada test procedure. The 9200 family is a moving-coil velocity transducer, so electrical checks should be performed using equipment appropriate for this sensor type.
4. Vibration test
Where a calibrated vibration shaker is available, verify the output against a known vibration velocity. A functional test is substantially more informative than visual inspection alone.
5. Installation verification
Confirm mounting orientation, connector configuration, cable routing, and the receiving monitor/input channel before returning the sensor to service.
The Veteran’s Tech Trap Guide
⚠️ Do not confuse velocity with proximity measurement.
The 9200 measures absolute casing/structural vibration velocity. It is not a replacement for a Bently Nevada eddy-current proximity probe used to measure shaft displacement relative to the bearing housing.
⚠️ The suffix matters.
The base model “9200” is not enough for procurement. This specific part uses a side-mounted connector and circular 1/4-28 UNF mounting base. Another 9200 configuration can have a different connector or mounting arrangement.
⚠️ Do not judge a sensor by connector fit alone.
Mechanical compatibility does not establish measurement compatibility. Confirm sensitivity, frequency response, mounting configuration, and the input requirements of the receiving vibration-monitoring system.
PRO TIP: When replacing an installed 9200, record the original complete ordering code, mounting orientation, cable routing, and monitor channel before removing the sensor. That information can prevent a mechanically compatible but incorrectly configured replacement from entering the maintenance cycle.
Dynamic FAQ
What is Bently Nevada 9200-01-02-02-00?
It is a 9200 Series two-wire Seismoprobe velocity transducer for measuring absolute vibration of bearing housings, machine casings, or other structures.
What is the sensitivity of the 9200-01-02-02-00?
The commonly published nominal sensitivity is 20 mV/mm/s (500 mV/in/s), with technical references specifying ±5% under stated test conditions.
What is its frequency range?
The published typical frequency response is approximately 4.5 to 1,000 Hz. The specified minimum operating frequency for this ordering configuration is 4.5 Hz (270 cpm).
What does “01-02-02-00” mean?
For this ordering code:
- 01 — 0° ±2.5° mounting angle / 4.5 Hz minimum operating frequency
- 02 — side-mounted connector
- 02 — circular mounting base with 1/4-28 UNF stud
- 00 — no agency approvals required
These configuration details are specifically reported for part 9200-01-02-02-00.
Does the 9200-01-02-02-00 require external power?
The 9200 is a moving-coil velocity transducer and does not operate like an externally excited eddy-current proximity probe. Technical references describe the sensor as a passive two-wire velocity transducer.
Is New Surplus 9200-01-02-02-00 available?
Current industrial-part listings show this exact part number being offered as new, new-surplus, or supplier-stock inventory, although actual condition varies by seller. Some listings state a 12-month supplier warranty.
What should be confirmed before purchasing?
Confirm the complete part number, connector orientation, mounting-base configuration, sensitivity, required frequency range, receiving monitor/input compatibility, and stock condition. For a critical machinery-protection application, request documented functional-test results rather than relying solely on a “new” or “tested” label.
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