Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 21500-00-12-10-02 |
| Brand | Bently Nevada |
| Product Type | Proximity Vibration Probe |
| Transducer Series | 7200 Proximity |
| Probe Tip Diameter | 5 mm |
| Case Thread | 1/4-28 UNF |
| Lead Armor | None |
| Unthreaded Length | 0 in |
| Overall Case Length | 1.2 in |
| Total Cable Length | 1.0 m |
| Connector Option | 02 – Miniature coaxial |
| Power Supply | -17.5 to -26 VDC |
| Current Consumption | 12 mA maximum |
| Calibrated Range | 2.0 mm |
| Scale Factor | 7.87 V/mm +/- 4% |
| Frequency Response | 0 to 10 kHz |
| Calibrated Linearity | +/- 0.02 mm |
Measurement Function and Signal Characteristics
The probe forms part of a proximity measurement chain. As the conductive target moves relative to the probe tip, the eddy-current response changes with the gap, allowing the associated transducer electronics to produce a displacement-related voltage signal.
The specified scale factor of 7.87 V/mm +/- 4% describes the voltage change per unit of displacement within the calibrated operating range. The 0 to 10 kHz frequency response defines the stated dynamic response range, while the calibrated linearity of +/- 0.02 mm indicates the specified deviation from the calibration characteristic.
Mounting and Connection Configuration
The 1/4-28 UNF case thread identifies the mounting thread, and the unthreaded length of 0 in indicates that no unthreaded section is specified in this configuration. The probe has a 1.2 in overall case length and a 1.0 m total cable length, which should be considered when checking mechanical clearance and cable routing.
The connector option is identified as 02, specified in the supplied data as miniature coaxial. The lead armor is listed as none. Verify the mating connection and the complete transducer system requirements before replacement.
Frequently Asked Questions
Q: What does the Bently Nevada 21500-00-12-10-02 measure?
A: It detects changes in the gap between the probe tip and a conductive target. Within the specified measurement chain, this response supports shaft displacement, vibration, and radial position monitoring.
Q: What power supply does this probe require?
A: The supplied specification lists -17.5 to -26 VDC, with a maximum current consumption of 12 mA. Confirm the required supply and wiring against the installed 7200 system configuration before commissioning.
Q: What should be checked when replacing this probe?
A: Verify the complete model number, 5 mm probe tip, 1/4-28 UNF thread, 1.0 m cable, miniature coaxial connector, calibrated range, and electrical characteristics. Do not assume compatibility based on the 7200 series designation alone.
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