Dependable Armored Probe for Critical Asset Protection
The Bently Nevada 21505-00-28-05-02 7200 8 mm Standard Mount Armored Probe is a rugged, high-precision eddy current proximity probe designed for continuous monitoring of shaft vibration, axial position, and radial displacement in rotating machinery. As part of the proven 7200 Proximity Transducer System, this probe combines reliable non-contact sensing with a stainless steel armored cable to provide enhanced protection in demanding industrial environments where mechanical wear and vibration are common. It complies with the measurement principles widely adopted in API 670 machinery protection systems and is engineered for long-term operational stability.
Configured with an 8 mm probe tip, 2.8-inch (71 mm) case length, and a 0.5-meter integral armored cable, the probe delivers outstanding installation flexibility while maintaining excellent signal integrity. Its durable construction makes it well suited for turbines, compressors, generators, pumps, and other mission-critical rotating equipment where uninterrupted monitoring is essential.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21505-00-28-05-02 |
| Product Type | 7200 8 mm Standard Mount Armored Probe |
| Series | 7200 Proximity Transducer System |
| Probe Diameter | 8 mm |
| Mounting Style | Standard Mount |
| Probe Thread | 3/8-24 UNF |
| Armor Type | Stainless Steel Armored Cable |
| Unthreaded Length | 0 in |
| Overall Case Length | 2.8 in (71 mm) |
| Integral Cable Length | 0.5 m (20 in) |
| Connector | Miniature Male Coaxial Connector |
| Measurement Principle | Eddy Current (Non-contact) |
| Typical Linear Range | 2.0 mm (80 mils) |
| Sensitivity | 200 mV/mil (7.87 V/mm) |
| Operating Temperature | -51°C to +177°C |
| Dimensions | Approx. 71 × 8 mm |
| Weight | Approx. 0.26 kg |
Typical Applications
The 21505-00-28-05-02 armored probe is widely used in industrial condition monitoring systems for critical rotating equipment.
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Industrial pumps
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Electric motors
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Power generators
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Gearboxes
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Blowers and process fans
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Oil & gas production facilities
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Petrochemical plants
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Mining machinery
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Pulp and paper mills
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Steel manufacturing equipment
Technical FAQs
1. What is the primary purpose of this armored probe?
It continuously measures shaft vibration, axial position, and displacement without physical contact while providing additional protection for the probe cable in demanding industrial environments.
2. What makes this model an armored probe?
The integral cable is protected by stainless steel armor, which significantly improves resistance to abrasion, mechanical impact, and vibration compared with standard probes.
3. Which monitoring system is this probe designed for?
It is designed for the Bently Nevada 7200 Proximity Transducer System and operates together with compatible extension cables and Proximitor sensors.
4. What is the probe diameter?
This model features a standard 8 mm sensing tip, making it suitable for most industrial rotating machinery monitoring applications.
5. What is the overall case length?
The probe has a 2.8-inch (71 mm) case length, offering an excellent balance between installation flexibility and sensing performance.
6. How long is the integral cable?
This configuration includes a 0.5-meter (20-inch) armored integral cable terminated with a miniature male coaxial connector.
7. Which thread size is used?
The probe utilizes a 3/8-24 UNF threaded body for secure installation in compatible probe holders and machinery brackets.
8. What sensing technology does the probe use?
It operates using eddy current technology, delivering accurate non-contact measurement of conductive shaft surfaces with excellent repeatability.
9. Which industries commonly install this probe?
It is widely used in power generation, oil & gas, petrochemical processing, mining, pulp and paper, and heavy manufacturing where continuous machinery protection is required.
10. Why choose the 21505-00-28-05-02?
Its rugged armored construction, proven measurement accuracy, compact design, and compatibility with the trusted 7200 Series make it an excellent solution for protecting valuable rotating assets while minimizing maintenance costs.
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