Proximity Sensors

5mm,8mm,11mm Proximity Sensors

3300 5mm Proximity Probe. Sensor and Transducer System

The 3300 5mm Proximity Transducer System offers a smaller probe diameter while interfacing with XL 8mm extension cable and 5mm proximity sensor. The system provides an output voltage that is directly proportional to the distance between the probe tip and the observed conductive surface. The system can measure both static (position) and dynamic (vibration) data. Its primary use is in vibration and position measurement applications on fluid-film bearing machines, as well as Keyphasor measurement and speed measurement applications

The 3300 5mm Proximity Transducer System includes:

• 3300 5mm probe
• 3300 XL 5mm extension cable
• 3300 XL 5mm proximity sensor
• 3300 XL 8mm Proximity Probe, Sensor and Transducer System

The 3300 XL 8 mm system delivers the most advanced performance in our eddy current proximity transducer systems. The standard 3300 XL 8mm 5-meter system also fully complies with the American Petroleum Institute’s (API) 670 Standard (4th Edition) for mechanical configuration, linear range, accuracy, and temperature stability. All 3300 XL 8mm proximity transducer systems provide this level of performance and support complete interchangeability of probes, extension cables, and Proximitor† sensors, eliminating the need to match or bench calibrate individual components.

The 3300 XL 8mm Proximity Transducer System includes:

• 3300 XL 8mm proximity probe
• 3300 XL 8mm extension cable
• 3300 XL 8mm proximity sensor
• 3300 XL 11mm Proximity Probe, Sensor and Transducer System

Our 3300 XL 11 mm Proximity Transducer System is our standard eddy current proximity measurement system. It accommodates a variety of applications with a linear measurement range of 4 mm (160 mil) and provides a 3.94 V/mm (100 mV/mil) output to measure vibration and displacement. The 11 mm tip gives this Transducer System a longer linear range when the standard 8 mm lacks sufficient reach. With both European and North American approvals, the 330 XL 11mm allows for installation in Hazardous Areas.

Bently Nevada’s 3300 11mm Proximity Transducer System consists of:

• 3300 XL 11mm probe
• 3300 XL 11 mm extension cable
• 3300 XL 11mm proximity sensor

16mm, 25mm and 50mm Proximity Sensor System

3300 XL 16mm High-Temperature Turbine Sensor System
Bently Nevada’s 3300 XL High-Temperature Proximity System (HTPS) withstands extreme temperatures (rated for +350°C or +662°F). This high-temperature sensor is suitable for use inside gas turbines, steam turbines and other types of rotating machinery.

The 16mm system measures:

• Vibration
• Thrust position
• Differential expansion
• Mode shape analysis
• Seal clearance
• Labyrinth seals
• Bearing housing struts in steam turbines
• Exhaust path in gas turbines.

3300 XL 25mm Turbine Sensor and Transducer System

The 3300 XL 25mm Proximity Transducer System provides an extended linear measurement range of 12.7 mm (500 mil) and is ideal for use in steam turbine TSI (Turbine Supervisory Instrumentation) systems. The 3300 XL 25 mm Transducer System measures differential expansion (DE) on mid-size to large steam turbine generators caused by the difference in growth rates between the turbine rotor and the machine stator (casing), and plays a vital role in any comprehensive TSI system. The 25mm probe can survive in the harshest steam turbine differential expansion environments. The 25mm Proximitor Sensor has RFI/EMI immunity to achieve European CE mark approvals without special mounting considerations.

3300 XL 50mm Turbine Sensor and Transducer System
Our 3300 XL 50 mm Proximity Transducer System offers the longest linear measurement of all of our eddy current proximity sensor systems with a range of 27.9 mm (1100 mil). The 3300 XL 50 mm system measures the differential expansion (DE) between the rotor and stator of large steam turbine generators and is a vital input for Turbine Supervisory Instrumentation (TSI) systems.

The 50 mm system is capable of withstanding the harshest steam turbine environment. The RFI/EMI immunity of our 50 mm Proximitor sensor enables its European CE mark approvals without special mounting considerations.

Specialty Proximity Sensor Systems

3300 XL Ceramic Probe
When you need to monitor machinery in corrosive, chemical, or high-pressure environments, the 3300 XL Ceramic Capped Probe is your best choice. Featuring an Alumina ceramic cap and 304 stainless steel probe casing, the 3300 XL Ceramic Capped probe provides robust protection for applications in anhydrous ammonia or other extreme pH environments. While the 3300 XL CCP is rated to 34 Bar (500 psi), it can be modified for applications with higher pressures. Compatible with the 8 mm 3300 XL Proximitor Sensor and its extension cable.

3300 XL NSv Compressor Sensors
When your counterbore clearances are too small for standard Proximity Sensor and Transducer Systems, he 3300 XL NSv (narrow side view) Proximity Transducer System is here to help. Suitable for centrifugal air compressors, refrigeration compressors, process gas compressors and other machines with tight installation requirements, the 3300 XL NSv is also ideal for small targets such as measuring radial vibration on shafts smaller than 51 mm (2 in) or an axial position on flat targets smaller than 15 mm (0.6 in). Additionally, this sensor serves tachometer, zero speed and Keyphasor applications.

3300 XL Underwater Probe
3300 XL underwater probes are designed specifically for applications involving constant exposure to liquids, such as those in hydroelectric plants or sewage treatment facilities. These designs also seal the probes against gases. All our underwater probes are rated to 500 psi (34 Bar) on the interface between the tip and probe casing.

Proximity Probe Housing Assemblies

PROXPAC XL Proximity Transducer Assembly
Our 3300 PROXPAC† XL Transducer Assembly integrates our Proximitor sensor with a specially-designed probe housing to create a compact, self-contained, all-in-one proximity probe system. An advanced thermoplastic called Polyphenylene Sulfide (PPS) is molded with glass and conductive fibers to strengthen the housing and effectively dissipate the danger of electrostatic charges. The housing cover contains its own 3300 XL Proximitor sensor, thus eliminating the need for an extension cable. Rated Type 4X and IP66 – the 3300 PROXPAC XL provides extra protection in severe environments.

Why Bently Sensors?

Proximity Sensor

More than 60 years ago Don Bently launched his first industrial product: the eddy current proximity sensor. The decades since that achievement have seen the quality and diversity of our proximity sensors evolve to include transducers that detect the presence of acceleration, velocity, and pressure.

Today’s high-performance eddy current proximity sensors deliver continuous condition monitoring information and trip monitored machines when needed to support a proactive maintenance program and machinery diagnostics.

Our industry-leading proximity solutions offer superior performance and interchangeability in harsh environments with full API 670 compliance on applicable options. Here are a few benefits of our proximity sensor systems:

Reduces Costs – When you use our proximity sensors as part of your plantwide monitoring program, your costs associated with insurance, maintenance, and unscheduled repairs will go down significantly
Increases Revenue – Conversely, when you use our proximity sensors as part of your plantwide monitoring program, revenue will increase through increased uptime and production quality.
Minimizes Unplanned Outages – You can convert unplanned and costly outages into planned, manageable downtime.