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The Bently Nevada 330705-02-18-90-02-05 is a 3300 XL 11 mm reverse mount proximity probe designed for high-precision, non-contact measurement of shaft vibration and displacement in rotating machinery.

It is part of the Bently Nevada 3300 XL proximity transducer system, widely used for condition monitoring and protection of turbines, compressors, pumps, and generators in critical industrial environments. The reverse-mount structure provides installation flexibility in confined mechanical spaces where standard probe installation is not feasible.

Technical Specifications

Item	Specification
Brand	Bently Nevada
Series	3300 XL
Model	330705-02-18-90-02-05
Product Type	11 mm Reverse Mount Proximity Probe
Measurement Principle	Eddy Current
Measurement Function	Shaft vibration & displacement
Probe Diameter	11 mm
System Type	3300 XL Proximity Transducer System
Total Cable Length Option	9.0 m
Thread Type	3/8-24 UNF
Connector Type	Miniature coaxial ClickLoc
Mounting Type	Reverse mount
Application	Machinery condition monitoring

Dimensions & Weight

Item	Specification
Dimensions (L × W × H)	Approx. 180 × 11 × 11 mm
Weight	Approx. 0.07 kg

Recommended Related Models

Model	Description
330705-02-18-90-02-00	Standard reverse mount version
330705-02-18-10-02-05	Short cable / alternative approval version
330704-000-060-10-02-00	Straight probe variant
330704-000-080-10-01-00	Extended configuration
330703 Series	8 mm proximity probes
330780 Series	Proximitor sensor

Popular Bently Nevada Models

Model	Product Category
330703 Series	8 mm Proximity Probe
330704 Series	11 mm Proximity Probe
330705 Series	Reverse Mount Probe
330780 Series	Proximitor Sensor
330130 Series	Extension Cable
3500/40M	Monitoring Module

Applications

The 330705-02-18-90-02-05 is used in industrial rotating machinery monitoring systems such as:

Steam turbines
Gas turbines
Centrifugal compressors
Industrial pumps
Electric motors
Generators
Fans and blowers
Petrochemical processing systems
Oil & gas production facilities
Heavy industrial equipment

Key Advantages

High-accuracy eddy current sensing technology
Reverse mount design for flexible installation
Stable non-contact vibration measurement
Suitable for continuous 24/7 monitoring
Compatible with 3300 XL system architecture
Supports predictive maintenance strategies
Helps reduce unplanned downtime
Industrial-grade durability for harsh environments
Long service life in critical applications
Widely used in global industrial systems

Technical FAQs

Q1. What is the main function of this probe?
It measures shaft vibration and displacement without physical contact.

Q2. What system is it compatible with?
It is part of the Bently Nevada 3300 XL proximity transducer system.

Q3. What does the “90” represent?
It indicates a 9.0 m cable length configuration.

Q4. What does the “05” suffix mean?
It represents specific approval/configuration options depending on ordering specification.

Q5. Can it operate continuously?
Yes, it is designed for 24/7 industrial monitoring applications.

Q6. Which industries use this model?
Power generation, oil & gas, petrochemical, mining, and heavy industry.

Q7. Does it require additional components?
Yes, it must be used with a Proximitor sensor and extension cable.

Q8. Is it suitable for harsh environments?
Yes, it is engineered for industrial durability and stable performance.

Q9. What equipment is it used on?
Turbines, compressors, pumps, motors, and generators.

Q10. Why choose the 3300 XL reverse mount series?
Because it provides flexible installation, high measurement accuracy, and proven reliability in critical machinery protection systems.

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