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Product Introduction
The Bently Nevada 330706-05-46-10-02-00 3300 XL 11 mm Reverse Mount Probe is a high-performance non-contact displacement sensor specifically engineered for industrial machinery vibration and position monitoring. As part of the Bently Nevada 3300 XL Series, this probe represents one of the most reliable and stable solutions for machinery protection systems. It is designed for reverse mounting configurations, which allows installation from the rear side of the machine housing, offering mechanical protection and improved accessibility in restricted or hazardous environments.
This probe operates on the eddy current sensing principle, generating a signal proportional to the distance between the probe tip and the conductive target, typically a rotating shaft. The 330706 series maintains compatibility with 3300 XL Proximitor Sensors and extension cables, forming a complete system for precise vibration, position, and axial displacement measurements. It provides exceptional linearity, thermal stability, and immunity to electrical noise. Engineered with a rugged stainless steel body, hermetically sealed construction, and corrosion-resistant materials, it ensures long-term reliability even under severe mechanical and environmental stress.
Technical Specifications
| Parameter | Description |
|---|---|
| Model | Bently Nevada 330706-05-46-10-02-00 |
| Series | 3300 XL 11 mm Reverse Mount Probe |
| Measurement Principle | Eddy Current (non-contact displacement) |
| Nominal Sensitivity | 200 mV/mil (7.87 mV/μm) |
| Linear Range | 2.0 mm (80 mils) |
| Usable Measurement Range | 0.25 mm to 2.25 mm |
| Frequency Response | DC to 10 kHz (±3 dB) |
| Standard Target Material | AISI 4140 steel |
| Operating Temperature (Probe) | -35°C to +177°C |
| Temperature Coefficient | < 0.1% per °C |
| Probe Tip Diameter | 11 mm |
| Mounting Type | Reverse Mount (installed from rear of housing) |
| Mounting Thread | M14 × 1.5 |
| Cable Type | Double-shielded coaxial cable |
| Electrical Isolation | Probe tip isolated from case |
| Compliance Standards | API 670, CE, CSA, ATEX (system dependent) |
| Weight | 0.17 kg |
| Total Length | 1.0 meter |
Product Applications
The Bently Nevada 330706-05-46-10-02-00 Reverse Mount Probe is widely used in rotating machinery monitoring and protection systems where space constraints or environmental protection are important. Its reverse mounting capability makes it ideal for applications where the probe must be inserted from the opposite side of the bearing housing or where physical exposure must be minimized.
Typical applications include:
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Gas and Steam Turbines: Measuring radial shaft vibration and position to prevent imbalance and mechanical failure.
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Compressors: Monitoring rotor motion and detecting misalignment or bearing wear in high-speed equipment.
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Motors and Generators: Tracking shaft vibration and displacement for early fault detection.
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Pumps and Fans: Detecting vibration due to mechanical looseness, imbalance, or misalignment.
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Industrial Gearboxes: Measuring shaft displacement to diagnose wear or gear misalignment.
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High-Temperature Equipment: Suitable for environments with extreme thermal variations, ensuring consistent measurement performance.
By pairing this probe with the 3300 XL Proximitor Sensor and extension cables, it forms a complete displacement measurement system used for both machinery protection and condition-based maintenance, delivering dependable real-time diagnostics in critical process operations.
Product Advantages
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Reverse Mount Design: Facilitates installation from the rear side of the machine, ideal for limited-space or high-risk locations.
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High Accuracy and Stability: Provides excellent linearity and repeatability over the entire operating range.
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Superior Thermal Resistance: Operates stably across temperatures from -35°C to +177°C without performance drift.
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Robust Construction: Stainless steel probe body and hermetic sealing resist corrosion, oil, and chemical exposure.
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Strong EMI Immunity: Double-shielded coaxial cable minimizes electrical interference for stable signal transmission.
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Full Compatibility: Works seamlessly with Bently Nevada 3300 XL Proximitor Sensors and extension cables.
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Maintenance-Free Operation: Non-contact sensing eliminates mechanical wear and calibration drift.
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API 670 Compliance: Meets the stringent requirements for machinery protection and vibration measurement.
FAQ
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What is the primary function of the 330706-05-46-10-02-00 reverse mount probe?
It measures non-contact vibration and displacement of rotating machinery shafts using an eddy current sensing principle. -
How does the reverse mount design benefit the installation?
The reverse mount configuration allows the probe to be installed from behind the machine housing, protecting it from mechanical damage and simplifying access in confined areas. -
Which Proximitor Sensor should be used with this probe?
The probe is designed to operate with the 3300 XL Proximitor Sensor, ensuring accurate calibration and consistent sensitivity across all operating conditions. -
What type of signal does the probe output?
The system outputs a voltage proportional to shaft displacement, typically 200 mV per mil, corresponding to changes in the gap between the probe tip and target surface. -
What is the recommended material for the target surface?
The probe is factory-calibrated for AISI 4140 steel, ensuring precise response characteristics. Other conductive materials may be used with minor sensitivity deviations. -
Can the probe measure both static and dynamic movement?
Yes, it accurately measures both static displacement (shaft position) and dynamic vibration (movement caused by imbalance or misalignment). -
What factors influence measurement accuracy during installation?
Proper probe gap setting, secure grounding, and perpendicular alignment to the target surface are essential for precise and stable readings. -
How does the probe maintain accuracy under high temperature conditions?
It utilizes temperature-compensated components and high-grade materials to minimize thermal drift and maintain calibration. -
Is the probe compatible with hazardous area certifications?
Yes, when integrated with the proper 3300 XL system components, it complies with ATEX, CE, and CSA standards for hazardous areas. -
What frequency range can this probe effectively measure?
The probe supports a DC to 10 kHz frequency response, suitable for both low-speed and high-speed machinery vibration monitoring.
Related Models (Same Series)
| Model | Description |
|---|---|
| 330706-05-46-10-02-05 | Reverse mount probe with modified tip and cable orientation |
| 330706-05-46-10-01-00 | Reverse mount version for general-purpose machinery monitoring |
| 330704-000-040-10-02-05 | Standard front-mount 11 mm probe for general vibration applications |
| 330704-005-040-10-02-00 | Front-mount probe with medium cable length |
| 330703-000-100-10-02-00 | Compact 11 mm probe for space-limited installations |
| 330703-010-070-10-01-00 | Medium-range probe designed for balanced shaft monitoring |
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