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The 330752-25-CN is a 3300 XL 50 mm Proximitor Sensor produced by Bently Nevada. It serves as the core signal conditioning unit of a non-contact eddy current transducer system.
Hazardous Area Compliance for China Market
Ultra-High Temperature Vibration Measurement
Physical Isolation and High-Fidelity Signal Conditioning
The 3300 XL 50 mm Transducer System consists of a separate 50 mm probe, an extension cable, and a 3300 XL 50 mm Proximitor Sensor. The large diameter coil gives this system a maximum linear range of 27.9 mm (1100 mils), the longest linear range of our eddy current transducer line. This linear range makes the 3300 XL 50 mm Transducer System ideal for measuring the differential expansion (DE) or rotor expansion (RX) of large steam turbine generators that results from the difference in growth rates between the turbine rotor and the machine stator (casing).
The 3300 XL 50 mm probe comes in three case & thread configurations to physically replace all standard 7200 50 mm systems (including side and rear exit probes). The standard 7200 style mounting brackets are still available as accessories. In addition, a new bracket to adapt the probe to the 50 mm DE Integral transducer sliding mount base is also available. The Proximitor Sensor has a 0.394 V/mm (10 mV/mil) output that is identical to that of the 7200 and 50 mm DE Integral systems, which allows customers to upgrade without requiring any changes in the monitor configuration. When upgrading from previous systems, every transducer system component (probe, extension cable, and Proximitor Sensor) must be replaced with 3300 XL 50 mm components.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 330878-90-00 Proximitor Sensor Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Thermal Power
Monitors large differential expansion in 300MW+ steam turbine low-pressure cylinders.
Nuclear Power
Tracks relative axial elongation of long-shaft rotors in massive nuclear steam turbines.
Iron and Steel
Monitors axial differential expansion changes in blast furnace blowers and TRT turbines.
Pulp and Paper
Measures axial thermal elongation of hot dryer roll shafts in paper machines.
Wind Power
Monitors large-stroke axial squeezing displacement in offshore wind gearboxes.
Coal Chemical
Provides non-contact relative displacement measurement for syngas compressor shafts.
When using the 330878-90-00 Proximitor, keep these key points in mind. First, cable lengths must match precisely, as it is calibrated for a 9.0-meter system, the combined length of the probe and extension cables must equal exactly 9.0 meters to prevent measurement distortion. Second, protect it from heat and moisture, this panel-mount hardware operates between -35°C and +85°C and must be secured inside a field enclosure away from extreme heat. Third, target and signal optimization, the flat target surface on the shaft must be at least 102 mm in diameter and made of standard AISI 4140 steel, while coaxial connectors must be mechanically locked and shielding properly grounded to isolate electromagnetic interference and prevent loosening from high-frequency vibrations.
It is a 3300 XL 50 mm Proximitor Sensor produced by Bently Nevada. It serves as the core signal conditioning unit of a non-contact eddy current transducer system.
What is the primary use of the 330878-90-00?
It converts 50mm probe signals into DC voltage, primarily for measuring differential expansion.
How to install 330878-90-00?
Rail mounted, connects to probe via extension cable, signals output to monitor.
What is the physical operating principle of the 330878-90-00?
It uses eddy current technology to convert energy loss from metal proximity into a proportional DC voltage output.
What are the ambient operating temperature limits for the 330878-90-00 during operation?
The normal operating temperature range for the Proximitor enclosure is -35°C to +85°C (-31°F to +185°F), and it must be installed in a protective enclosure within this thermal range.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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