Bently Nevada 330425-01-05 Accelerometer 100 mV/g Sensor

Bently Nevada 330425-01-05 Accelerometer for Precision Vibration Monitoring

Overview of the Bently Nevada 330425-01-05

The Bently Nevada 330425-01-05 accelerometer delivers accurate vibration data for rotating machinery. This sensor uses a 1 ¼-28 UNF integral stud for secure mounting. Its sensitivity reaches 10.2 mV/m/s² (100 mV/g) with a tolerance of ±5%. Therefore, it captures subtle changes in vibration effectively.

Additionally, the device supports a frequency response from 10 Hz to 15 kHz. Within the 30 Hz to 10 kHz range, the response stays within ±10%. Meanwhile, the acceleration range hits 490 m/s² (50 g) peak overall. For high-frequency vibrations above 15 kHz, the range decreases significantly due to resonance.

Key Technical Specifications

The Bently Nevada 330425-01-05 maintains amplitude linearity at ±1% up to 490 m/s² peak. Its broadband noise floor sits at only 0.039 m/s² rms between 10 Hz and 15 kHz. Consequently, readings remain clean even in noisy environments.

Temperature sensitivity varies typically from -11% to +3% across the operating range. Transverse sensitivity stays below 5% of axial, which minimizes cross-axis errors. The mounted resonant frequency exceeds 30 kHz, with a resonant peak amplitude of 20 dB maximum.

For base strain sensitivity, this model (serial numbers with “G”) achieves 49 mm/s²/mstrain. Older units without “G” show higher strain sensitivity, but the included mounting base reduces it to 4.9 mm/s²/mstrain.

Environmental and Mechanical Limits

The Bently Nevada 330425-01-05 operates between -55°C and +121°C. It survives shocks up to 49,050 m/s² peak. Moreover, the case is hermetically sealed, handling 100% condensing humidity. Its IP68 rating means dust-tight and watertight protection for the sensor only.

Magnetic field susceptibility stays below 2.21 mm/s²/gauss. The sensor weighs 99 g typically and measures 23 mm in diameter. Height reaches 59 mm including the mounting stud. Case material is 316L stainless steel, ensuring corrosion resistance.

Power and Connectivity

This accelerometer requires an input voltage of -24 ± 0.5 Vdc. Bias current is 2 mA nominal. Output bias voltage measures -8.5 ± 0.5 Vdc. The case is isolated for grounding flexibility.

Furthermore, maximum cable length extends to 305 metres without signal degradation. A 3-pin MIL-C-5015 receptacle provides reliable connection. Mounting torque is specified at 4.1 N·m. The mounting surface must be 32 microinch rms for optimal contact.

Installation Guidelines for the Bently Nevada 330425-01-05

First, prepare a clean mounting surface with roughness at 32 microinch rms. Next, apply the recommended torque of 4.1 N·m when fastening the integral stud. Do not overtighten, as this may damage the sensor.

Additionally, verify that the mounting angle can be any orientation. The sensor works in any position. However, ensure the cable does not pull or twist the connector. For units without the “G” serial prefix, Bently Nevada strongly recommends using the supplied Mounting Base (API adapter) to minimize base strain.

Finally, connect the 3-pin MIL-C-5015 plug to the mating cable. Keep total cable length within 305 metres to preserve signal fidelity. Avoid routing cables near high electromagnetic interference sources.

Typical Applications

This transducer is ideal for monitoring turbines, compressors, pumps, and fans. It suits hazardous areas due to its CSA, ATEX, and IECEx approvals. The wide temperature range makes it useful in both cold and hot environments. Because of its IP68 rating, you can install it in dusty or wet locations.

Moreover, the low noise floor enables detection of early bearing faults. The high-frequency response up to 15 kHz captures gear mesh vibrations effectively. Therefore, maintenance teams rely on the Bently Nevada 330425-01-05 for predictive maintenance programs.

Packaging List

• Bently Nevada 330425-01-05 accelerometer sensor (1 unit)

• Integral mounting stud (1 ¼-28 UNF)

• Mounting Base (API adapter) – included as standard

• Protective dust cap for 3-pin MIL-C-5015 receptacle

• Quick start installation sheet

Frequently Asked Questions

1. What approvals does the Bently Nevada 330425-01-05 carry?
It holds multiple approvals including CSA, ATEX, and IECEx. This makes it suitable for use in hazardous industrial environments.

2. Can I use this accelerometer at temperatures below freezing?
Yes. The operating temperature range starts at -55°C, so freezing conditions are well within its limits.

3. How do I reduce base strain sensitivity for older units?
For serial numbers not preceded by “G”, install the sensor with the supplied Mounting Base. This lowers base strain from 980 to 4.9 mm/s²/mstrain.

4. What shipping methods do you use?
We ship via FedEx, UPS, or DHL. Delivery times vary by destination but typically range from 3 to 7 business days.

5. Does the sensor require special cables?
Use a compatible 3-pin MIL-C-5015 cable. The maximum recommended length is 305 metres to avoid signal degradation.