Introduction
The Bently Nevada 330701-00-30-10-02-00 3300 XL 11 mm Proximity Probe is a precision, non-contact eddy-current probe designed for measuring shaft vibration and displacement on critical rotating machinery.
This configuration uses a 1/2-20 UNF thread, a 30 mm overall case length, and a 1.0 m integral cable. The 02 cable option specifies a miniature coaxial ClickLoc connector with standard cable, while the 00 approval option indicates that no additional agency approval configuration is selected.
The 3300 XL 11 mm platform provides a 4 mm (160 mil) linear measurement range and a nominal output of 3.94 V/mm (100 mV/mil). Its larger 11 mm sensing tip offers a longer linear range than the standard 3300 XL 8 mm system, making it particularly useful for axial position, radial vibration, Keyphasor, and other demanding machinery measurements.
Technical Specifications
The complete 3300 XL 11 mm transducer system consists of the probe, a compatible extension cable, and a 3300 XL 11 mm Proximitor Sensor. These components should be selected as a matched system to achieve the specified electrical performance.
| Specification | 330701-00-30-10-02-00 |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL 11 mm |
| Product Type | Eddy-Current Proximity Probe |
| Model | 330701 |
| Mounting Style | Standard Mount |
| Thread | 1/2-20 UNF-2A |
| Armor | Without armor |
| Unthreaded Length | 0.0 in |
| Overall Case Length | 3.0 in (76.2 mm) |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector/Cable Option | 02 |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Approval Option | 00 |
| Agency Approval | Not required |
| Measurement Principle | Eddy-current proximity sensing |
| Nominal Sensitivity | 100 mV/mil (3.94 V/mm) |
| System Linear Range | Approx. 4 mm (160 mil) |
| Recommended Gap | 2.5 mm (100 mil) |
| System Frequency Response | 0–8 kHz, +0/-3 dB typical |
| Minimum Flat Target Diameter | 30.5 mm (1.2 in) |
| Recommended Minimum Shaft Diameter | 152 mm (6.0 in) |
| Probe Tip | 11 mm class |
| Probe Case | Stainless steel |
| Cable Construction | 75 Ω triaxial, FEP insulated |
| Probe Temperature Range | Approx. -52°C to +177°C |
| Approx. Probe Weight | About 70 g for minimum-length 1 m non-armored reference |
| Approx. Cable Weight | 45 g/m |
| Approx. Shipping Weight | Varies by packaging |
Applications
The 330701-00-30-10-02-00 is intended for continuous non-contact measurement of shaft movement in machinery-monitoring and protection systems.
Typical applications include:
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Radial shaft vibration monitoring
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Shaft displacement measurement
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Axial or thrust position monitoring
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Turbine vibration protection
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Steam turbine thrust monitoring
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Compressor shaft monitoring
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Generator vibration monitoring
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Pump and motor shaft measurement
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Keyphasor phase-reference measurement
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Tachometer measurement
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Zero-speed detection
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Differential expansion applications
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Critical rotating-equipment condition monitoring
The 3300 XL 11 mm system is particularly useful where the longer linear range of an 11 mm proximity system is advantageous. Bently Nevada identifies axial/thrust position, steam-turbine ramp differential expansion, reciprocating-compressor rod position or rod drop, tachometer/zero-speed, and Keyphasor measurements among the principal applications.
For machinery protection, the probe is normally used together with a compatible 3300 XL 11 mm extension cable and Proximitor Sensor, rather than as a standalone measurement device.
Advantages
Extended Linear Measurement Capability
The 11 mm sensing platform provides a 4 mm (160 mil) linear range, giving it a significant measurement advantage where a conventional 8 mm proximity system does not provide sufficient range.
This is especially useful for axial-position and displacement applications.
Proven Eddy-Current Technology
The non-contact eddy-current principle allows the probe to measure shaft movement without physically contacting the rotating target. This makes it well suited to high-speed rotating machinery.
Standard 1/2-20 UNF Mounting
The 1/2-20 UNF-2A thread provides a widely used imperial mounting configuration within the 3300 XL 11 mm family.
Compact 3-Inch Case
With a 3.0-inch case length, this configuration provides a shorter probe body than many longer-case options in the same family. This can be valuable where installation space is restricted.
1-Meter Integral Cable
The 1.0 m integral cable provides practical distance between the probe mounting location and the extension-cable connection while avoiding unnecessary excess cable in compact installations.
Secure ClickLoc Interface
The miniature coaxial ClickLoc connector is designed to lock into position, helping prevent accidental loosening caused by machinery vibration. The 3300 XL design also incorporates CableLoc technology to strengthen the probe-to-cable connection.
Rugged Industrial Construction
The 3300 XL 11 mm probe family is built for demanding machinery environments, with a stainless-steel probe body and robust molded probe-tip construction.
Broad Frequency Response
The complete transducer system has a typical 0–8 kHz frequency response, allowing the probe to capture both low-frequency shaft movement and higher-frequency vibration components.
Flexible Machinery Monitoring
One probe family can support a wide variety of measurements, from radial shaft vibration to axial position and Keyphasor applications, making the 3300 XL 11 mm platform a versatile component for machinery-protection systems.
Technical FAQs
1. What is the Bently Nevada 330701-00-30-10-02-00?
It is a 3300 XL 11 mm standard-mount proximity probe featuring a 1/2-20 UNF thread, 3.0-inch case length, 1.0 m integral cable, standard cable, and no additional agency approval configuration.
2. What does 330701 mean?
330701 identifies the 3300 XL 11 mm probe with a 1/2-20 UNF thread and no armor.
3. What does the first “00” specify?
The first 00 indicates a 0.0-inch unthreaded-length option.
4. What does “30” mean?
The 30 specifies a 3.0-inch overall case length, equivalent to approximately 76.2 mm.
5. How long is the integral cable?
The 10 option specifies a 1.0 m (3.3 ft) total integral cable length.
6. What does the “02” option mean?
The 02 configuration uses a miniature coaxial ClickLoc connector with standard cable. It differs from options 11 and 12, which use FluidLoc cable.
7. What does the final “00” mean?
The final 00 indicates that no additional agency approval option is required for the ordered configuration.
8. What is the recommended probe gap?
The standard 3300 XL 11 mm system uses a recommended nominal gap of approximately 2.5 mm (100 mil) under the specified calibration conditions.
9. What is the system frequency response?
The complete 3300 XL 11 mm transducer system has a typical frequency response of 0 to 8 kHz, +0/-3 dB.
10. Can this probe be connected to a 3300 XL 8 mm Proximitor Sensor?
No assumption should be made that the two systems are interchangeable. The 3300 XL 11 mm probe, extension cable, and Proximitor Sensor are designed as a matched transducer system. When replacing or upgrading equipment, the complete signal chain and monitoring-system configuration should be checked.
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