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The 330877-080-36-00 is a probe extension cable belonging to the 3300 XL 50 mm series. It is mainly used to connect Bentley XL 50 mm proximity sensors to front-end transmitters or monitoring systems, and is commonly used in TSI (Turbine Monitoring System) systems of large rotating machinery such as steam turbines.
FluidLoc prevents liquid penetration
ClickLoc Gold-Plated Miniature Coaxial Connector
High-performance fluorinated ethylene propylene copolymer (FEP/PFA) material
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 330877-080-36-00 Extension Cable 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
Installed on ultra-supercritical steam turbines to transfer differential expansion data of the rotor relative to the casing during start-up.
Nuclear Power
Used on high-power nuclear turbine generators to track shaft axial growth under high-temperature steam environments.
Petrochemical & Refining
Placed on large ethylene compressors to route eddy current signals while preventing high-pressure synthetic lubes from wicking into junction boxes.
Steel & Metallurgy
Connected to blast furnace blower turbines to assist in monitoring casing thermal expansion in high-ambient-heat locations.
Hydroelectric Power
Used on massive vertical hydro-turbines to monitor the axial hydraulic thrust and vertical lift displacement of the shaft.
Pulp & Paper
Used on heavy pulp refiners to measure the axial gap between refining discs, ensuring stable fiber processing quality.
When operating the 330877-080-36-00 extension cable, you must strictly adhere to the 0.56 N·m maximum torque to tighten the ClickLoc gold-plated connectors and ensure the bend radius during routing is not smaller than its physical limitation to prevent damage to the inner coaxial structure, while keeping the connectors clean during maintenance, and although it features a fluid-blocking construction, you should still avoid immersing the bare connector parts in corrosive liquids for long periods, and finally, you must verify that the total cable length of the entire loop matches the proximity sensor during system connection.
This product utilizes a specific coaxial impedance structure inside, featuring a total cable length of 8.0 meters without a stainless steel protective armor. The product employs Bently Nevada's specific FluidLoc barrier construction, which cuts off the physical pathway for liquids to travel through the gaps between the inner wires and the jacket in field environments, preventing high-pressure oil, water, steam, or chemical media from migrating to the enclosure side. Its outer layer is covered with a high-density fluorinated ethylene propylene copolymer material, enabling it to withstand industrial field temperatures ranging from -51°C to +200°C and block erosion from most synthetic lubricants as well as acid and alkali solvents.In terms of electrical connection, this product is equipped with ClickLoc miniature coaxial snap-on gold-plated connectors at both ends, featuring a nominal characteristic impedance of 75 ohms and a typical capacitance of 69.9 picofarads per meter. This product is dedicated to working with 50 mm eddy current probes and corresponding proximity sensors to form a complete measurement circuit, carrying the responsibility of transferring eddy current variations sensed by the probe tip over a long distance to monitoring instruments without distortion. In concrete industrial applications, it assists in measuring the bearing expansion, large axial displacement, and case differential expansion of large steam turbine generator sets, and is usually permanently installed inside or on the outer shell brackets of generators, heavy compressors, or turbine drives.
It is a Proximitor Sensor from the Bently Nevada 3300 XL 11 mm series. It processes the signal from a proximity probe and converts it into a voltage signal readable by monitoring systems.
What is the primary working principle of 330877-080-36-00?
It works on the eddy current principle. The Proximitor generates a high-frequency RF signal sent to the probe. When the probe is near a conductive metal, eddy currents are generated, causing energy loss. The Proximitor precisely converts this gap change into a voltage output via tuned circuits.
How to correctly use products like 330877-080-36-00?
It must be paired with a probe and extension cable from the 3300 XL 11 mm series that have a combined total length of 8.0 meters. It should be mounted on a DIN rail inside a protective enclosure and wired to a monitoring system (such as the 3500 system).
Does 330877-080-36-00 require individual bench calibration in the field?
No. The system supports complete interchangeability, eliminating the need to match or bench calibrate individual components when replacing the paired 11 mm probe or extension cable.
Can a probe from a 5-meter system be connected to 330877-080-36-00?
No. Since this model has the -080 option (8-meter system), the combined physical length of the probe and extension cable must equal exactly 8.0 meters; otherwise, severe measurement errors will occur.
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