Introduction
The Bently Nevada 330191-00-16-10-05 is a 3300 XL 8 mm Extended Temperature Range (ETR) Proximity Probe designed for demanding machinery-monitoring applications where reliable shaft displacement measurements are required at elevated temperatures.
This probe uses a 3/8-24 UNF thread and a non-armored construction. Its 330191 base model is specifically identified as a 3300 XL 8 mm ETR probe, while the individual suffixes define the mechanical length, cable length, and approval configuration.
For this particular configuration, 00 indicates zero unthreaded length, 16 specifies a 1.6-inch overall case length, 10 specifies a 1.0 m total cable length, and 05 identifies the multiple-approval configuration. This makes the probe a practical choice for installations where elevated-temperature capability, compact mounting geometry, and recognized hazardous-area approvals are important.
Unlike a standard Proximitor Sensor, the 330191 is the physical sensing probe installed near the rotating shaft. It is normally used with a compatible Proximitor Sensor to complete the 3300 XL proximity transducer system.
Technical Specifications
The 330191 family is the ETR version of the 3300 XL 8 mm proximity probe with a 3/8-24 UNF threaded body and no armor. The ETR design is intended for applications where the probe is exposed to substantially higher temperatures than standard 3300 XL proximity probes.
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330191-00-16-10-05 |
| Product Type | 3300 XL 8 mm ETR Proximity Probe |
| Probe Family | 3300 XL Extended Temperature Range |
| Base Model | 330191 |
| Thread Type | 3/8-24 UNF-2A |
| Probe Diameter | 8.0 mm (0.31 in) |
| Armor | Non-armored |
| Unthreaded Length | 0.0 in |
| Overall Case Length | 1.6 in (40.64 mm) |
| Total Cable Length | 1.0 m (3.3 ft) |
| Cable Type | Standard cable |
| Connector | Miniature coaxial ClickLoc |
| Approval Option | Multiple Approvals |
| Approvals | CSA, ATEX, IECEx |
| Measurement Principle | Eddy-current, non-contact |
| Typical Application | Shaft vibration and position measurement |
| Temperature Capability | Extended-temperature ETR design |
| Approximate Shipping Weight | 1.5 kg |
| Installation | Threaded machinery mounting |
Applications
High-Temperature Turbine Monitoring
The ETR construction makes the 330191 particularly attractive for turbine applications where proximity probes may experience higher operating temperatures. Direct shaft measurement provides useful information about rotor vibration and position.
Compressor Monitoring
The probe can be incorporated into compressor monitoring systems where accurate shaft displacement information is needed under demanding thermal conditions.
Steam Turbines
Steam turbine environments can expose instrumentation to elevated temperatures. An ETR proximity probe provides a more appropriate solution than a standard-temperature probe when the installation falls within the ETR operating envelope.
Generator and Rotating Equipment
The 330191 can be used on generators and other large rotating machines where shaft vibration and position measurements form part of the machinery-monitoring strategy.
Fluid-Film Bearing Applications
Direct shaft measurements are especially valuable on machines using fluid-film bearings. The proximity probe measures rotor movement directly, providing information that can complement casing-vibration measurements.
Shaft Position Measurement
The probe can monitor changes in the distance between its sensing tip and the conductive shaft target. This allows the associated monitoring system to evaluate static shaft position as well as dynamic movement.
Machinery Protection Systems
When connected to a compatible Proximitor Sensor and monitoring system, the 330191 can form part of a machinery-protection channel for critical rotating equipment.
Advantages
Extended Temperature Capability
The biggest advantage of the 330191 family is its Extended Temperature Range design. It is intended for applications where conventional 3300 XL proximity probes may not provide the required thermal capability.
Compact 1.6-Inch Case
The 1.6-inch case configuration provides a compact sensing arrangement, making the probe suitable for installations where mounting depth and available mechanical space are important.
Zero Unthreaded Length
The 00 option provides 0.0 inch unthreaded length, giving the probe a particularly compact configuration between the threaded mounting area and the sensing arrangement.
1-Meter Cable
The integrated 1.0 m cable provides a convenient connection length between the probe and the associated Proximitor system while keeping the assembly relatively compact.
3/8-24 UNF Thread
The 3/8-24 UNF threaded body provides a familiar mounting format for machinery applications using compatible English-threaded mounting hardware.
Non-Contact Measurement
Eddy-current technology allows the probe to measure shaft movement without contacting the rotating target. This eliminates probe-tip mechanical wear during normal operation and supports continuous monitoring.
Multiple-Approval Configuration
The -05 configuration is identified with multiple approvals, including CSA, ATEX, and IECEx. This is useful when the equipment must satisfy specified hazardous-area certification requirements.
3300 XL System Compatibility
The 330191 is part of the established 3300 XL 8 mm proximity transducer platform and is intended to operate with compatible Proximitor Sensors and system components.
Direct Rotor Measurement
The probe measures the shaft directly rather than relying on casing movement. This makes it a valuable sensing element for applications where rotor dynamics are an important part of machine-condition evaluation.
Practical Replacement Option
For machinery already equipped with compatible 3300 XL ETR instrumentation, the 330191-00-16-10-05 provides a clearly defined configuration that can simplify replacement and maintenance planning.
Technical FAQs
1. What is the Bently Nevada 330191-00-16-10-05?
It is a 3300 XL 8 mm Extended Temperature Range proximity probe with a 3/8-24 UNF thread, 1.6-inch case length, 1.0 m cable, and multiple approval configuration.
2. Is the 330191 a Proximitor Sensor?
No. The 330191 is the physical proximity probe. A compatible Proximitor Sensor is required to condition the probe signal and complete the proximity transducer system.
3. What does ETR mean?
ETR means Extended Temperature Range. The 330191 series is designed for applications where the probe may encounter higher temperatures than standard 3300 XL proximity probes.
4. What does the first 00 in the part number mean?
In 330191-00-16-10-05, the first 00 represents an unthreaded length of 0.0 inch.
5. What does 16 represent?
The 16 specifies an overall case length of 1.6 inches, or approximately 40.64 mm.
6. What does 10 represent?
The 10 identifies the 1.0 m (3.3 ft) total cable-length configuration.
7. What does the final 05 indicate?
The final 05 identifies the multiple-approval configuration, associated with CSA, ATEX, and IECEx approvals.
8. What thread does the probe use?
The 330191 uses a 3/8-24 UNF-2A thread. It is therefore intended for compatible English-threaded mounting arrangements rather than the M10 × 1 versions found in the metric 330193/330194 families.
9. What is the probe tip diameter?
The sensing tip is approximately 8.0 mm (0.31 in) in diameter, consistent with the 3300 XL 8 mm proximity system.
10. What should be checked before ordering a replacement?
Confirm the complete 330191-00-16-10-05 configuration, including the 3/8-24 UNF thread, zero unthreaded length, 1.6-inch case length, 1.0 m cable, connector arrangement, approval requirement, and compatibility with the existing Proximitor Sensor. For critical machinery, matching the complete transducer system is preferable to selecting a probe solely by its 330191 base number.
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