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        330851-02-010-140-10-00-05

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        330851-02-010-140-10-00-05 is a 3300 XL 25 mm probe with M30x2 thread, 1.0m length, 140mm case, 10mm unthreaded, multiple hazardous area approvals for DE measurement.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 330851-02-010-140-10-00-05

        • Manufacturer:
          Bently Nevada
        • Part Number:
          330851-02-010-140-10-00-05
        • Product Family:
          3300 XL 25mm Proximity Transducer System
        • Product Type:
          Proximity Probe
        • Probe Case Type:
          02 = M30x2 thread
        • Unthreaded Length:
          010 = 10 mm (increments of 2mm)
        • Overall Case Length:
          140 = 140 mm
        • Total Length:
          10 = 1.0 metre (3.3 feet)
        • Armor Option:
          00 = No Armor
        • Agency Approval:
          05 = Multiple Approvals (CSA, ATEX, IECEx)
        • Linear Range:
          12.7 mm (500 mils)
        • Average Scale Factor (ASF):
          0.787 V/mm (20 mV/mil) nominal
        • Output Voltage Range:
          Approximately -1.5 to -11.5 Vdc over linear range
        • Tensile Strength (Case to Lead):
          330 N (75 pounds)
        • Recommended Minimum Target:
          61 mm (2.4 in) diameter (flat target)
        • Frequency Response:
          0 to 2.7 kHz (+0, -3 dB typical)
        • Supply Voltage:
          -17.5 Vdc to -26 Vdc
        • Probe dc Resistance (1.0m):
          6.2 ± 0.5 ohms
        • Weight:
          0.42 kg
        • Estimated shipping dimensions:
          117.5x5x5cm
        • Tariff Code:
          8479899990
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Firmware & Updates Configuration & Programming

        Features:

        • Specifically designed for DE monitoring on mid-size to large steam turbine generators, measuring thermal growth differences between rotor and stator with 12.7mm linear range.
        • Continuous operation up to 200°C (392°F) and intermittent up to 250°C (482°F). Features front/rear seals and FluidLoc cable to prevent moisture ingress in harsh turbine environments.
        • Carries CSA, ATEX, and IECEx certifications for installation in explosive atmospheres (Zone 0, 1, 2; Division 1, 2). Includes high-temperature gold-plated ClickLoc connectors with removable collar for tight clearance routing.
        The 330851-02-010-140-10-00-05 is specifically engineered for differential expansion (DE) monitoring in steam turbine generators, one of the most critical measurements for turbine supervisory instrumentation (TSI). During startup and load changes, the turbine rotor and casing expand at different rates due to differences in mass, material, and steam contact. If the differential expansion exceeds design limits, internal rubbing between rotating blades and stationary diaphragms can occur, leading to catastrophic damage.

        The 330851-02-010-140-10-00-05 is built to survive the extreme conditions found inside steam turbine casings. Unlike standard proximity probes rated at 177°C, this 25 mm probe continuously operates at up to 200°C (392°F) and can withstand intermittent temperature spikes up to 250°C (482°F) during turbine transients. This high-temperature capability is achieved through specialized materials including PEEK (polyetheretherketone) probe tip material and high-temperature PFA cable insulation. Moisture ingress is a common failure mode in turbine DE probes, as steam condensation can damage the sensing coil.

        The 330851-02-010-140-10-00-05 with agency approval option 05 carries comprehensive hazardous area certifications including CSA (North America), ATEX (Europe), and IECEx (international). These certifications allow the probe to be installed in Zone 0, Zone 1, and Zone 2 (ATEX/IECEx) as well as Class I, Division 1 and Division 2 (CSA) explosive atmospheres commonly found in power generation facilities where hydrogen-cooled generators or natural gas fuel systems are present. The probe's temperature classification ranges from T1 to T5 depending on ambient temperature, with T5 (-55°C to +40°C) and T4 (-55°C to +80°C) ratings.

        The 330851-02-010-140-10-00-05 Bently Nevada Proximity Probe may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        Bently Nevada 330851-02-010-140-10-00-05 Proximity Probe 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. All prices are shown in USD.
        Bently Nevada 330851-02-010-140-10-00-05 Proximity Probe Specs

        General

        • Manufacturer GE / Bently Nevada
        • Model 330851-02-010-140-10-00-05
        • Condition New Original ready stock
        • Product Family 330851-02-010-140-10-00-RU,330851-02-010-140-10-00-CN,330851-05-000-040-50-01-05
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • urbine Differential Expansion (DE) Monitoring: This is the primary role for this probe. During startup, warm-up, and loading phases of heavy steam turbines, the rotor and the outer casing (stator) expand thermally at vastly different rates and times.
        • Hydro-Turbine Shaft Runout: Deployed on low-speed hydro units that exhibit large structural clearances and slow, broad dynamic wobbling.
        • Heavy Machinery Structural Shift: Used on massive industrial blowers and heavy-duty axial compressors to monitor axial rotor float or frame structural shifting under extreme load pressures.
        • The Probe Itself Has "No Firmware": The Bently Nevada 330851 probe is a purely analog, passive hardware component composed of a stainless-steel casing, a PEEK/PPS plastic tip, and an internal high-frequency induction coil.
        • 330850 Proximitor Sensor: This is also a pure analog signal-conditioning circuit block without firmware, though its hardware circuitry is factory-calibrated to match the 25 mm probe characteristics.
        • Bently Nevada 3500 Monitoring Rack: If the probe output is tied into a 3500/45 Position Monitor Module, this specific chassis card runs an embedded microcontroller. When upgrading plant industrial networks or performing cyber-hardening routines, engineers utilize the Bently Nevada 3500 Rack Configuration Software over an Ethernet/Serial link to flash the latest factory-authorized firmware patch onto the 3500 monitor card.
        • Establishing the correct mechanical baseline gap is the most crucial configuration step. The optimal operational center point (bias voltage) for the 25 mm system is -9.0 Vdc, which corresponds to a physical standoff distance of approximately 7.0 mm (275 mils).
        • Field Tuning Procedure: Screw the probe into the bracket while measuring the DC voltage at the Proximitor output terminals using a multimeter (or observing the live gap voltage in the 3500 configuration utility). When the meter reads exactly -9.0 Vdc, the probe is sitting precisely at the geometric mid-point of its 12.7 mm linear scale. Once verified, torque the locknuts down tight on the M30x2 threads to secure the probe body.
        • Channel Sensor Selection: Under the 3500/45 module setup screen, configure the designated channel's Sensor Type to 3300 XL 25 mm Proximity Transducer.
        Description
        The 330851-02-010-140-10-00-05 is a 3300 XL 25 mm proximity probe designed specifically for differential expansion (DE) measurement on mid-size to large steam turbine generators. This probe features an M30x2 metric thread (option 02) with an unthreaded length of 10mm (option 010) and an overall case length of 140mm (option 140). 

        The 330851-02-010-140-10-00-05 offers a linear range of 12.7 mm (500 mils) with an average scale factor of 0.787 V/mm (20 mV/mil). This 25 mm probe can continuously operate and maintain accuracy in high temperatures up to 200°C (392°F) and withstand intermittent temperatures up to 250°C (482°F).

        The 330851-02-010-140-10-00-05 uses special high-temperature ClickLoc connectors with a removable collar that facilitates routing the cable through tight clearances. Connector protectors and a disposable installation tool are included to ensure connectors remain free of contamination. 

        For high-temperature differential expansion monitoring, the 330851-02-010-140-10-00-05 is an ideal choice. The probe case comes standard with a locknut with predrilled safety wire holes. The 330851-02-010-140-10-00-05 has a tensile strength rating of 330 N (75 pounds) at the probe case to probe lead. 
        Alternative Names
        33O851-O2-O1O-14O-1O-OO-O5 33085I-02-010-I40-10-00-05 330851 02 010 140 10 00 05 330851-02-010-140-10-00-00 330851-02-010-140-10-00-RU 330851-02-010-140-10-00-CN 330851-05-000-040-50-01-05 330851-06-000-070-10-00-05
        Technical notes
        The 330851-02-010-140-10-00-05 is a 1.0m 25 mm DE probe with M30x2 thread, 140mm case length, 10mm unthreaded. Features 12.7mm linear range, 0.787 V/mm scale factor, 200°C continuous rating. Includes FluidLoc cable, high-temp ClickLoc connectors, multiple hazardous area approvals (option 05).
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the primary application of 330851-02-010-140-10-00-05?
        The 330851-02-010-140-10-00-05 is designed for differential expansion (DE) measurement on mid-size to large steam turbine generators, measuring the difference in growth rates between the turbine rotor and machine stator.
        What is the linear range and scale factor of 330851-02-010-140-10-00-05?
        This 25 mm probe provides a linear range of 12.7 mm (500 mils) with an average scale factor of 0.787 V/mm (20 mV/mil). The linear range begins at approximately 0.63 mm (25 mils) from the target.
        What temperature ratings does 330851-02-010-140-10-00-05 have?
        The probe can continuously operate at up to 200°C (392°F) and withstand intermittent high temperatures up to 250°C (482°F), making it suitable for harsh steam turbine DE environments.
        Is 330851-02-010-140-10-00-05 compatible with older 7200 systems?
        Yes, the 330851-02-010-140-10-00-05 is designed to physically replace all standard 7200 25 mm, 7200 35 mm, and 25 mm DE Integral transducer systems, allowing upgrades without monitor configuration changes.

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