The Bently Nevada 330400-01-RU is a high-performance accelerometer designed for precision vibration monitoring on industrial machinery. This acceleration transducer captures dynamic motion data from bearings, casings, and structural components on turbines, compressors, pumps, and motors. Manufactured in the U.S.A., this model features a ¼-28 UNF integral stud for secure mounting.
This specific configuration includes the Mounting Thread Option 01 and the Agency Approval Option RU for country-specific requirements. The 330400-01-RU delivers a sensitivity of 10.2 mV/m/s² (100 mV/g) ±5%, making it compatible with most standard vibration monitoring systems. Its wide frequency response ensures accurate detection of both low-speed and high-speed machinery faults.
The 330400 series accelerometers incorporate robust design features for reliable operation. For instance, the case is hermetically sealed and constructed from 316L stainless steel, providing excellent corrosion resistance. Additionally, the case is electrically isolated from ground, which helps prevent ground loop issues in your measurement system.
The 330400-01-RU acceleration transducer offers impressive electrical and performance characteristics. Its acceleration range extends to 490 m/s² (50 g) peak overall within the 10 Hz to 15 kHz frequency span. The amplitude linearity is within ±1% to 490 m/s² (50 g) peak, ensuring accurate measurements across the full range. Furthermore, the broadband noise floor is exceptionally low at 0.039 m/s² (0.004 g) rms from 10 Hz to 15 kHz.
Specifically, the frequency response is ±3dB from 10 Hz to 15 kHz (600 cpm to 900,000 cpm) and ±10% from 30 Hz to 10 kHz (1800 cpm to 600,000 cpm). The mounted resonant frequency exceeds 30 kHz, well above the measurement range. Transverse sensitivity is less than 5% of axial sensitivity, minimizing errors from off-axis vibrations.
Power requirements for this sensor include an input voltage of -24 ± 0.5 Vdc and a bias current of 2 mA nominal. The output bias voltage is -8.5 ± 0.5 Vdc. The maximum cable length is 305 meters (1000 feet) without signal degradation, providing flexibility in system layout.
The construction of the 330400-01-RU accelerometer prioritizes durability and reliability. The case is machined from 316L stainless steel, offering excellent resistance to corrosion and physical damage. The connector is a 3-pin MIL-C-5015 receptacle, a rugged military-grade design. The sensor weighs 99 g (3.5 oz) typical, with a diameter of 23 mm (0.93 in) and a height of 59 mm (2.3 in) including the mounting stud.
In terms of environmental resilience, this acceleration transducer operates within a temperature range of -55°C to +121°C (-67°F to +250°F) for both storage and operation. It can survive shock loads up to 49,050 m/s² (5000 g) peak, making it highly robust. The relative humidity rating is 100% condensing (non-submerged), and the case is hermetically sealed. The IP rating is equivalent to IP 68 (dust tight and watertight) for the sensor body only.
A critical specification for the 330400-01-RU is its base strain sensitivity, which varies based on the serial number prefix. For units with serial numbers preceded by the letter "G" (all new sensors), the base strain sensitivity is 49 mm/s²/mstrain (0.005 g/mstrain). For units with serial numbers NOT preceded by "G" (shipped prior to April 2004), the sensitivity is 980 mm/s²/mstrain (0.100 g/mstrain) without the Mounting Base (API adapter) and 4.9 mm/s²/mstrain (0.0005 g/mstrain) with the Mounting Base.
Therefore, for older units without the "G" prefix, Bently Nevada strongly recommends installing the accelerometer with the supplied Mounting Base to minimize base strain errors. Proper surface preparation is also essential. The mounting surface should have a finish of 32 minch rms. The recommended mounting torque is 4.1 N·m (3.0 ft·lb). The sensor can be mounted in any orientation.
While the 330400-01-RU itself does not carry a specific hazardous area approval like ATEX or CSA, it is designed for use in general industrial environments. The Agency Approval Option RU indicates that this model meets country-specific requirements for the Russian market. For applications in explosive atmospheres, please consult Bently Nevada for certified alternatives.
Your shipment for the 330400-01-RU will include the following items:
1 x Bently Nevada 330400-01-RU Accelerometer (¼-28 UNF integral stud)
1 x Mounting Base (API adapter) – included for applicable units
Installation and mounting instructions sheet
Note: Cables and signal conditioning equipment are sold separately.
Q1: What is the sensitivity of the Bently Nevada 330400-01-RU accelerometer?
The 330400-01-RU has a sensitivity of 10.2 mV/m/s² (100 mV/g) ±5%. This is a standard sensitivity for industrial vibration monitoring.
Q2: What is the frequency response range of this acceleration transducer?
This acceleration transducer has a frequency response of 10 Hz to 15 kHz (±3dB) and 30 Hz to 10 kHz (±10%). This covers a wide range of machinery speeds.
Q3: What is the operating temperature range for the 330400-01-RU?
The operating and storage temperature range is -55°C to +121°C (-67°F to +250°F). This makes it suitable for most industrial environments.
Q4: Does the 330400-01-RU require a specific mounting torque?
Yes, the recommended mounting torque is 4.1 N·m (3.0 ft·lb). Ensure the mounting surface has a finish of 32 minch rms for optimal performance.
Q5: What is the base strain sensitivity, and why does it matter?
Base strain sensitivity measures the sensor's response to strain on the mounting surface. For new units (serial numbers with "G"), it is 49 mm/s²/mstrain. Lower values mean less measurement error from mounting surface deformation.
| Brand Name | |
| Model No. | 330400-01-RU |
| Product Type | Accelerometer Acceleration Transducer |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
