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      330425-01-00

      Acceleration Transducer
      Ships by Friday, November 6
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Bently Nevada 330425-01-00 is a three-wire piezoelectric accelerometer with 25 mV/g sensitivity and a 75 g peak measuring range. Its integral 1/4-28 UNF stud mounts directly to a machine casing or bearing housing.
      • Manufacturer part number
        330425-01-00
      • Shipping
        Swift global dispatch
      • Condition
        New, original product
      • Shipping size (est.)
        6.5cm x 2.5cm x 2.3cm
      • Country of Origin
        USA

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      What happens after you enquire

      • 0

        Review your reference

        Send the full sensor marking, serial prefix, quantity and monitored machine point.
      • 1

        Confirm the offer

        Confirm the integral stud, 25 mV/g channel, mounting-base needs and supplied cable scope.
      • 2

        Arrange dispatch

        Agree destination, quantity and dispatch timing for the confirmed accelerometer.

      • Match the complete marking

        Match 330425-01-00, the 1/4-28 integral stud and 25 mV/g sensitivity. Check the serial prefix and no-approval option.

      • Check the offered item before ordering

        Review label, connector and stud photographs. Confirm New, original product condition and any included mounting base; cables are separate unless itemized.

      Technical specifications for 330425-01-00

      • Manufacturer:
        Bently Nevada
      • Product Category:
        Machinery Monitoring Systems
      • Spare Part Number:
        330425-01-00
      • Weight:
        0.1 kg
      • Tariff Code:
        8537101190
      • Sensitivity:
        25 mV/g ±5%
      • Acceleration range:
        75 g peak; 10 Hz to 15 kHz
      • Amplitude linearity:
        ±1% to 75 g peak
      • Frequency response, ±3 dB:
        10 Hz to 15 kHz
      • Frequency response, ±10%:
        30 Hz to 10 kHz
      • Broadband noise:
        0.01 g RMS; 10 Hz to 15 kHz
      • Transverse sensitivity:
        <5% of axial
      • Mounted resonant frequency:
        >30 kHz
      • Resonant peak amplitude:
        20 dB maximum
      • Supply voltage:
        -24 ±0.5 V DC
      • Bias current:
        2 mA nominal
      • Output bias voltage:
        -8.5 ±0.5 V DC
      • Grounding:
        Case isolated
      • Maximum cable length:
        305 m without signal degradation
      • Operating / storage temperature:
        -55 to +121 °C
      • Shock survivability:
        5,000 g peak maximum
      • Humidity:
        100% condensing, non-submerged
      • Sensor enclosure:
        IP68 equivalent; cable excluded
      • Maximum use altitude:
        2,000 m
      • Connector:
        3-pin MIL-C-5015 receptacle
      • Mounting thread:
        1/4-28 UNF integral stud
      • Mounting torque:
        4.1 N·m
      • Case material:
        316L stainless steel
      • Agency approval option:
        00 - None
      View as PDF Ask for Quote

      Information

      Overview Downloads Applications / Compatibility Product Precautions
      • Bently Nevada 330425-01-00 supports high-frequency casing measurements such as gear-mesh monitoring. A rigid mechanical path from the monitored structure to the sensor is essential for the signal to represent machine vibration.
      Measurement: 25 mV/g ±5%, 75 g peak within 10 Hz to 15 kHz
      Electrical interface: -24 ±0.5 V DC supply, three-pin connector
      Mounting: 1/4-28 UNF integral stud, 4.1 N·m torque
      The 330425 sensing configuration provides 25 mV/g ±5% sensitivity and accommodates 75 g peak overall acceleration within the 10 Hz to 15 kHz band. These ratings use +20 to +30 °C and 100 Hz reference conditions unless otherwise specified. Strong vibration above 15 kHz, especially near resonance, reduces the usable acceleration range.

      The three-pin MIL-C-5015 interface requires a -24 ±0.5 V DC supply, with 2 mA nominal bias current and -8.5 ±0.5 V DC output bias. The receiving channel must use the 25 mV/g scale; a channel configured for a 100 mV/g accelerometer would report the wrong acceleration.

      The 01 mounting option uses a 1/4-28 UNF integral stud with 4.1 N·m mounting torque. Its electrically isolated, hermetically sealed 316L stainless-steel case supports operation from -55 to +121 °C. The sensor's IP68-equivalent protection excludes the cable assembly, so connector and cable protection remain separate installation considerations.
      Controller platform reference: Bently Nevada casing-acceleration monitoring. Match the negative supply and 25 mV/g channel scale.
      Technical resources for Bently Nevada 330425-01-00 separate the original product data from practical installation checks. Choose the manufacturer excerpt or the independent field guide below.
      The excerpt preserves original manufacturer pages. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
      System and supply context: The 330425-01-00 sensor connects through a three-conductor cable to an appropriate acceleration-monitoring input. Cables and protective mounting hardware are separate unless itemized in the quotation.

      Measurement applications: These uses concern casing acceleration. A measured housing response can represent rotor behavior only when the structure transmits sufficient vibration to the selected point.
      Apply these checks to Bently Nevada 330425-01-00 and its complete measurement channel before returning it to service.
      Apply the correct negative supply

      Verify -24 ±0.5 V DC. Do not substitute the positive constant-current circuit used by a different accelerometer family.

      Set 25 mV/g scaling

      Check the input sensitivity before accepting acceleration values or enabling channel alarms.

      Check the mounting generation

      Read the serial prefix and retain the specified mounting base for older non-G units.

      Control stud tightening

      Prepare the contact surface and apply 4.1 N·m without loading the electrical connector.

      Protect the cable separately

      Sensor enclosure protection does not establish cable or connector protection, or hazardous-area approval.

      Validate the frequency envelope

      Check dynamic response in the required band; vibration above 15 kHz can reduce usable acceleration range.

      Alternative Names

      330425-01-00 Bently Nevada 330425-01-00 330425-01-00 Acceleration Transducer

      Technical notes

      Mounting relationship: The sensor must receive vibration through the bearing housing or machine casing. Check surface preparation, stud torque and the serial-dependent mounting-base requirement.

      Signal conditioning: Use the specified negative supply and 25 mV/g scale. The wider ±3 dB frequency band and narrower ±10% band are different acceptance criteria.

      Environmental boundary: The hermetic sensor rating excludes the interconnect cable. Use a protected installation and appropriate cable routing.

      Technical reference: Bently Nevada 330400 and 330425 Accelerometer Acceleration Transducers, 141638 Rev. AB.

      FAQ View All FAQ

      • Why must a 100 mV/g input setting be changed when installing 330425-01-00?
        This sensor produces 25 mV/g, one quarter of a 100 mV/g sensor output for the same acceleration. Configure the input for 25 mV/g; otherwise the indicated acceleration will be scaled incorrectly.
      • Can 330425-01-00 retain its 75 g peak range above 15 kHz?
        The 75 g peak rating applies within 10 Hz to 15 kHz. Higher-frequency vibration, especially near the sensor resonance, significantly reduces that usable range. The mounted resonance above 30 kHz is not an extension of the calibrated band.
      • Which response tolerance applies when using 330425-01-00 between 30 Hz and 10 kHz?
        The response tolerance is ±10% over 30 Hz to 10 kHz. The wider 10 Hz to 15 kHz band uses a ±3 dB tolerance. Use the appropriate band when judging an amplitude measurement.
      • How does the serial-number prefix affect mounting-base selection for 330425-01-00?
        Sensors with a G serial prefix have lower base-strain sensitivity. For earlier units without that prefix, use the specified mounting base to reduce strain-related output. Check the actual serial number before retaining or removing an existing adapter.
      • What does case isolation mean for the three-wire connection of 330425-01-00?
        The sensor case is isolated from the electrical circuit. Use the correct supply, signal and common connections through the three-pin receptacle and the approved cable wiring. Do not use the casing as a substitute for the electrical return conductor.
      • Does the enclosure rating of 330425-01-00 also protect its interconnect cable?
        No. The IP68-equivalent rating applies to the sensor only. Choose and protect the cable and mating connector for the environment; the humidity condition is condensing and non-submerged.
      • What mounting torque should be applied to the integral stud of 330425-01-00?
        Apply 4.1 N·m to the properly prepared mounting interface. Maintain a rigid, clean contact with the machine surface. Incorrect mounting can reduce response or introduce signals unrelated to the actual casing vibration.
      • Which DC readings distinguish a correctly powered 330425-01-00 channel?
        Check the -24 ±0.5 V DC supply and -8.5 ±0.5 V DC output bias; nominal bias current is 2 mA. Follow these electrical checks with a controlled acceleration-response test, because a normal bias alone does not prove mechanical coupling.
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