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      3300/47

      Differential Expansion Monitor
      In Stock
      Ships by Monday, October 26
      Fast Shipping Available

      Product Describe：

      Bently Nevada 3300/47 is a two-input complementary differential-expansion monitor that combines alternating proximity-probe ranges to extend axial expansion measurement beyond one probe's linear span.

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      Technical specifications Information Technical notes FAQ

      Technical specifications for 3300/47

      Technical specifications for 3300/47

      • Manufacturer:
        Bently Nevada
      • Product Category:
        Machinery Monitoring System
      • Spare Part Number:
        3300/47
      • Estimated shipping dimensions:
        5.1x20.3x33cm
      • Weight:
        2 lbs (1.1 kg)
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Signal Inputs:
        Two proximity-probe transducer signals
      • Input Impedance:
        10 kOhm
      • Selectable Scale Factors:
        100, 20 or 10 mV/mil (4, 0.787 or 0.392 V/mm)
      • Power Consumption:
        1.5 W nominal
      • Signal-Conditioning Accuracy:
        Within +/-0.33% of full scale typical; +/-1% maximum
      • Recorder Output:
        User-programmable current or voltage output
      • Alarm Setpoints:
        Two independently adjusted full-scale alarm setpoints
      • Buffered Outputs:
        One coaxial output per transducer on the front panel
      • Operating Temperature:
        0 to +65 deg C
      • Storage Temperature:
        -40 to +85 deg C
      • Humidity:
        To 95%, non-condensing
      • Rack Requirement:
        One rack position; positions 1 and 2 reserved for power supply and system monitor
      • Weight:
        1 kg (2.2 lb)
      • Relay Requirement:
        At least one alarm relay module must be ordered with each 3300 system
      View as PDF Ask for Quote

      Information

      Information

      Overview Manuals Common Applications Product Precautions
      Bently Nevada 3300/47 extends turbine differential-expansion coverage by arranging two proximity probes so one remains in range as the measured collar moves beyond the useful span of the other.
      • Accepts two complementary proximity-probe channels.
      • Displays expansion magnitude and direction on the monitor LCD.
      • Provides configurable recorder output and independent alarm setpoints.
      • Supports alternate-probe measurement across an expanded axial range.

      The monitor changes the active measurement region at a defined crossover point. Probe mounting, initial gaps, scale-factor selection and alarm direction must be treated as one coordinated turbine supervisory measurement.

      Important Notice: The base model 3300/47 does not identify a complete A/B/C/D ordering execution. Confirm the front-panel and nameplate option codes before selecting full-scale range, transducer input or relay configuration.

      Bently Nevada 3300/47 Manuals & Downloads
      Bently Nevada 3300/47 Technical Reference (PDF)Bently Nevada 3300/47 Installation & Commissioning Guide (PDF)

      The Technical Reference organizes the exact ordering identity, applicable characteristics and system boundary for this differential expansion monitor. The Installation & Commissioning Guide covers identification, pre-installation checks, connections, functional verification and the acceptance record.

      Steam-turbine differential expansion
      Measure rotor-to-casing axial growth where one standard probe range is insufficient.
      Complementary probe arrangements
      Use two probes mounted so their linear regions cover adjacent portions of the travel.
      Startup and shutdown trending
      Observe thermal expansion direction and magnitude as the machine changes operating state.
      Protective alarm channels
      Drive configured alert and danger logic from the accepted complementary measurement.
      Apply these checks to the exact Bently Nevada 3300/47 item before returning its monitoring path to service.
      1
      Confirm the complete 3300/47 option code before assigning range or transducer type.
      2
      Document both probe orientations, gaps and the mechanical crossover geometry.
      3
      Verify the selected scale factor matches both connected transducer systems.
      4
      Check recorder-output format and receiving-system scaling before loop connection.
      5
      Confirm alert and danger direction for positive and negative expansion travel.
      6
      Keep buffered outputs isolated and use suitable diagnostic instruments.
      7
      Do not occupy rack positions reserved for the power supply or system monitor.
      8
      Prove the crossover response and both alarm directions before returning protection to service.

      Technical notes

      Technical notes

      The base model 3300/47 does not identify a complete A/B/C/D ordering execution. Confirm the front-panel and nameplate option codes before selecting full-scale range, transducer input or relay configuration.

      FAQS

      • What does Bently Nevada 3300/47 measure?
        It measures complementary input differential expansion using two proximity-probe signals.
      • Why does Bently Nevada 3300/47 use two probes?
        The paired arrangement extends the useful measurement range beyond the linear span of one probe.
      • How is direction shown on Bently Nevada 3300/47?
        The LCD indicates both magnitude and direction of differential expansion.
      • Which input impedance applies to Bently Nevada 3300/47?
        Each proximity-probe signal input is specified at 10 kOhm.
      • Can Bently Nevada 3300/47 use only the base model for ordering?
        No. The complete option code is needed to establish range, transducer input, relay and approval selections.
      • What outputs are available from Bently Nevada 3300/47?
        It provides a configurable recorder output and front-panel buffered transducer outputs.
      • Where can Bently Nevada 3300/47 be installed in a rack?
        It uses one rack position, excluding the positions reserved for the power supply and system monitor.
      • What should be tested after replacing Bently Nevada 3300/47?
        Verify both probe signals, crossover behavior, displayed direction, recorder scaling and alert/danger response.
      Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
      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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