Seventy-five-g range
The 25 mV/g scale allows the sensor to represent acceleration up to 75 g peak without using the higher-sensitivity 330400 range.
Product identity330425
Bently Nevada · machinery-casing acceleration transducer
Bently Nevada 330425-01-00 | 25 mV/g High-Range Accelerometer
Sensitivity25 mV/g
Range75 g peak
Official product identity and signal path
Model Profile
Bently Nevada 330425-01-00 is a case-mounted acceleration transducer for machinery-casing measurement where the 75 g peak range and 25 mV/g sensitivity are required. It converts axial casing acceleration into an electrical signal for the connected monitoring system.
The first suffix of Bently Nevada 330425-01-00 selects the 1/4-28 UNF integral mounting stud, while the final 00 selects no agency approval option. A three-pin MIL-C-5015 receptacle carries the powered sensor output, and the case remains electrically isolated.
When Bently Nevada 330425-01-00 is installed on a rigid bearing housing or machine casing, the mounting interface transfers casing motion into the sensing element. The receiving instrument supplies −24 Vdc with nominal 2 mA bias current and reads the −8.5 Vdc biased acceleration signal.
Verified configuration and operating values
Technical Parameters
Technical item330425-01-00
BrandBently Nevada
Product TypeHigh-range accelerometer
Brand CountryUnited States
Base code 33042525 mV/g high-range acceleration transducer
Sensor family330400 / 330425
AA 01 — mounting option1/4-28 UNF integral mounting stud
BB 00 — approval optionNo agency approval option
Sensitivity25 mV/g ±5%
Acceleration range75 g peak
Amplitude linearity±1% to 75 g peak
Broadband noise0.01 g rms, 10 Hz to 15 kHz
Frequency response10 Hz to 15 kHz, ±3 dB
Precision response band30 Hz to 10 kHz, ±10%
Mounted resonant frequency>30 kHz
Transverse sensitivity<5% of axial
Input voltage−24 ±0.5 Vdc
Bias current2 mA nominal
Output bias voltage−8.5 ±0.5 Vdc
Maximum cable length305 m without signal degradation
Case material316L stainless steel
Connector3-pin MIL-C-5015 receptacle
Operating / storage temperature−55 to +121 °C
Enclosure ratingIP68 sensor housing
Shock survivability5,000 g peak
Body dimensions25.4 mm diameter × 58.5 mm high
High-range casing response
Performance Characteristics
Bently Nevada 330425-01-00 trades sensitivity for a larger acceleration envelope while retaining a wide casing-vibration bandwidth.
Wide useful bandwidth
Casing motion is measured from 10 Hz to 15 kHz within ±3 dB, with a tighter ±10% band from 30 Hz to 10 kHz.
Low transverse pickup
Transverse sensitivity remains below five percent of the axial response, keeping the sensitive axis dominant when the mounting face is correctly prepared.
Rigid casing mount
Installation Highlights
Bently Nevada 330425-01-00 depends on a rigid, correctly torqued mounting path so machine-casing acceleration reaches the sensing element without interface distortion.
Prepare, seat and wire the accelerometer
The 1/4-28 stud transfers casing motion into the body, while the three-pin receptacle connects the powered output to the monitoring input.
Prepare a flat mounting surface
Machine or verify the mounting pad so the accelerometer seats squarely on the bearing housing or machine casing.
Torque the integral stud
Thread the 1/4-28 stud into the prepared hole and tighten the sensor to the specified 4.1 N·m mounting torque.
Connect and protect the cable
Use the matching three-socket connector, strain-relieve the cable and preserve shield and conduit protection through the run to the monitor.
Exact-model product questions
Product Help
Why can Bently Nevada 330425-01-00 appear less responsive than a 330400 on the same vibration source?
Bently Nevada 330425-01-00 intentionally uses 25 mV/g sensitivity to provide a 75 g peak range, whereas the 330400 is the 100 mV/g version. Confirm the monitor channel scale before interpreting the lower voltage as a sensor fault.
What should be checked when Bently Nevada 330425-01-00 sits near its negative bias limit or produces no dynamic signal?
Bently Nevada 330425-01-00 requires −24 ±0.5 Vdc and nominal 2 mA bias current through the correct three-pin connection. Verify supply polarity, common and signal wiring before changing the vibration alarm configuration.
How can poor mounting create misleading high-frequency data from Bently Nevada 330425-01-00?
Bently Nevada 330425-01-00 transfers casing acceleration through its integral 1/4-28 stud. A rough, flexible or loose mounting surface changes the mechanical coupling, so use a flat rigid pad and the specified mounting procedure before judging the 10 Hz to 15 kHz response.
Why must the cable for Bently Nevada 330425-01-00 be selected by connector and wiring function, not only by pin count?
Bently Nevada 330425-01-00 uses a three-pin MIL-C-5015 receptacle with powered sensor output. The mating cable must preserve the specified supply, signal and return conductors plus shielding; a connector that merely fits does not guarantee the correct electrical path.
What should a customer review if Bently Nevada 330425-01-00 clips during machine transients?
Bently Nevada 330425-01-00 is rated for 75 g peak. Confirm the monitor scaling and whether the actual transient exceeds that envelope; changing alarm values cannot restore signal information once the sensor or input range is exceeded.
How should a long cable run from Bently Nevada 330425-01-00 be planned?
Bently Nevada 330425-01-00 supports cable runs up to 305 m without stated signal degradation when the specified shielded connection is maintained. Keep the cable protected and preserve shield continuity rather than treating the maximum distance as independent of installation quality.
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