Radial shaft vibration
Mounted toward a journal, the 5 mm tip follows dynamic shaft movement relative to the bearing housing while the Proximitor converts that response for the monitor.
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Product Information
Bently Nevada 21500-00-28-10-02 is an unarmored 5 mm standard-mount proximity probe for the 7200 proximity transducer system. Its fiberglass probe body and 1/4-28 threaded case place the sensing tip at the conductive target, while the integral coaxial lead carries the eddy-current response to the matching extension cable and Proximitor.
Mechanical reach on Bently Nevada 21500-00-28-10-02 is defined by a zero unthreaded section and a 2.8 inch overall case. The 1.0 m integral lead terminates in the miniature male coaxial connector, so case position establishes the probe gap and the cable junction remains outside the threaded mounting path.
Within the complete 7200 chain, Bently Nevada 21500-00-28-10-02 shares the 2.0 mm calibrated range and 7.87 V/mm scale factor used by the matching 5 mm and 8 mm system electronics. Because this execution has no armor, the coaxial lead must be supported against abrasion and clamp pressure without altering the probe-to-target position.
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Technical Data
| Technical Item | Specification |
|---|---|
| Brand | Bently Nevada |
| Model | 21500-00-28-10-02 |
| Product Name | 7200 Series 5 mm standard-mount proximity probe |
| Country | United States |
| Probe execution | 21500 = 5 mm tip, 1/4-28 thread, without armor |
| Unthreaded length | 00 = 0.0 in |
| Overall case length | 28 = 2.8 in |
| Integral lead | 10 = 1.0 m |
| Connector | 02 = miniature male coaxial connector |
| Cable impedance | 95 Ω coaxial |
| System calibrated range | 2.0 mm (80 mil) |
| System scale factor | 7.87 V/mm (200 mV/mil) |
| System frequency response | 0 to 10 kHz |
| System supply | −17.5 to −26 V DC at 12 mA maximum |
| Probe and extension-cable temperature | −34 to +177 °C |
03
Typical Applications
Bently Nevada 21500-00-28-10-02 is used as the compact target-facing probe in matched 7200 systems assigned to non-contact shaft-motion measurements.
Axial shaft position
Facing a thrust collar or other axial target, the complete 7200 chain tracks changes in shaft position inside its calibrated measuring zone.
Phase and speed reference
A suitable rotating reference feature produces the periodic target passage used by the connected monitoring arrangement for phase or speed measurement.
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Installation Highlights
The compact case of Bently Nevada 21500-00-28-10-02 does not make installation generic; mounting reach, unarmored-lead protection and the matched cable path must each be checked against the machine arrangement.
Mounting reach
Check that the 1/4-28 mounting point and target location accept the zero unthreaded section and 2.8 inch case before inserting the probe.
Unarmored-lead protection
Support the 1.0 m coaxial cable with smooth bends and keep clamps away from the jacket and connector transition.
Final gap verification
Join the correct 7200 extension cable and Proximitor, set the gap from conditioned voltage, lock the case and repeat the voltage check after final tightening.
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Product Questions
01How does the 2.8 inch case affect installation of Bently Nevada 21500-00-28-10-02?
The 2.8 inch case on Bently Nevada 21500-00-28-10-02 determines whether the 5 mm tip reaches the target while leaving enough thread for locking and final gap adjustment.
02Why should the cable of Bently Nevada 21500-00-28-10-02 not be clamped tightly?
Bently Nevada 21500-00-28-10-02 has an unarmored 95 ohm coaxial lead. Crushing or sharply bending it can change continuity or damage the dielectric before the signal reaches the extension cable.
03Can Bently Nevada 21500-00-28-10-02 connect directly to a monitor input?
No. Bently Nevada 21500-00-28-10-02 is the probe element; the matching extension cable and 7200 Proximitor provide excitation and produce the conditioned voltage used by the monitor.
04What should be checked when Bently Nevada 21500-00-28-10-02 has an unstable gap reading?
For Bently Nevada 21500-00-28-10-02, inspect target clearance, case locking, coaxial continuity, connector cleanliness, extension-cable seating and Proximitor supply before changing the mechanical gap.
05Why can a similar 5 mm probe still be wrong for Bently Nevada 21500-00-28-10-02?
A similar probe can differ from Bently Nevada 21500-00-28-10-02 in thread, case length, lead length, connector or armor. Match the complete order string and the 7200 system length.
06What must be rechecked after Bently Nevada 21500-00-28-10-02 is tightened?
After Bently Nevada 21500-00-28-10-02 is tightened, recheck static gap voltage and cable strain because case rotation or lead pull can shift the final target distance.
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