330400-02-00 100mV/g M8 Bently Nevada Accelerometer

Product Overview

The Bently Nevada 330400-02-00 is a piezoelectric accelerometer designed for critical machinery applications requiring casing acceleration measurements. It features an M8 x 1 integral stud mounting and delivers a sensitivity of 10.2 mV/m/s² (100 mV/g) with a peak acceleration range of 490 m/s² (50 g). The sensor complies with API Standard 670 and is ideal for gear mesh monitoring, bearing analysis, and general machinery vibration assessment.

Key Specifications

• Sensor Type: Piezoelectric accelerometer
• Mounting Thread: M8 x 1 integral stud
• Sensitivity: 10.2 mV/m/s² (100 mV/g) ±5%
• Acceleration Range: 490 m/s² (50 g) peak
• Frequency Response: 10 Hz to 15 kHz (600 cpm to 900,000 cpm) ±3 dB
• Amplitude Linearity: ±1% to 490 m/s² (50 g) peak
• Broadband Noise Floor: 0.039 m/s² (0.004 g) rms (10 Hz to 15 kHz)
• Transverse Sensitivity: Less than 5% of axial sensitivity
• Mounted Resonant Frequency: Greater than 30 kHz
• Dimensions: 23 mm diameter x 59 mm height (including stud)
• Weight: 99 g (3.5 oz), excluding cable
• Connector: 3-pin MIL-C-5015 receptacle
• Operating Temperature: -55°C to +121°C (-67°F to +250°F)
• Mounting Torque: 4.1 N·m (3.0 ft·lb)

Features and Benefits

• High sensitivity of 100 mV/g captures low-level vibration signals for early fault detection
• Wide 10 Hz to 15 kHz frequency range covers gear mesh, bearing, and general vibration signatures
• M8 x 1 integral stud provides secure, direct machine surface mounting
• Rugged stainless steel construction withstands harsh industrial environments
• Low noise floor of 0.004 g rms enables detection of subtle machinery anomalies
• API 670 compliance ensures suitability for petrochemical and power generation applications

Applications

• Gear mesh monitoring on gearboxes and reducers
• Bearing casing vibration measurement on motors, pumps, and turbines
• General machinery health monitoring in predictive maintenance programs
• Rotating equipment vibration assessment in oil & gas facilities
• Power generation turbine and generator casing acceleration monitoring

FAQ

Q: How do I decode the Bently Nevada 330400 accelerometer suffix code?
A: The suffix uses a two-digit code. The first two digits indicate the mounting thread: -01 = 1/4-28 UNF integral stud, -02 = M8 x 1 integral stud. The last two digits indicate agency approvals: -00 = none, -05 = multiple (CSA, ATEX, IECEx). Therefore, 330400-02-00 decodes as M8 x 1 stud mount with no agency approvals.

Q: What is the difference between 330400-02-00 and 330400-01-00?
A: 330400-02-00 uses an M8 x 1 integral stud; 330400-01-00 uses a 1/4-28 UNF integral stud. Both share identical electrical performance.

Q: Does this accelerometer include agency approvals?
A: The -00 suffix indicates no agency approvals. For CSA/ATEX/IECEx certified versions, select 330400-02-05.

Q: What cable connects to the 3-pin MIL-C-5015 receptacle?
A: Bently Nevada offers compatible cables such as the 9571 series or other MIL-C-5015 terminated cables for connection to monitoring systems.

Q: What mounting surface preparation is required?
A: The mounting surface should be flat with a finish of 32 microinch rms or better to ensure proper signal transmission.

Installation Guide

1. Verify the machine surface is clean, flat, and free of paint or corrosion
2. Prepare the mounting surface to 32 microinch rms or better
3. Apply a thin film of coupling compound or oil to the mounting surface
4. Thread the M8 x 1 integral stud into a tapped hole or use an appropriate adapter
5. Torque the sensor to 4.1 N·m (3.0 ft·lb) using a calibrated torque wrench
6. Connect the 3-pin MIL-C-5015 cable to the sensor receptacle
7. Route the cable away from high-voltage sources and secure with clamps
8. Verify signal output at the monitor before placing the machine in service

Selection Tips

• Select 330400-02-00 for M8 x 1 stud mounting without agency approvals
• For 1/4-28 UNF stud mounting, choose 330400-01-00
• For M8 mounting with CSA/ATEX/IECEx approvals, select 330400-02-05
• For 1/4-28 mounting with approvals, select 330400-01-05
• For higher acceleration range (75 g peak), consider the 330425 series
• Ensure the monitoring system accepts 100 mV/g sensitivity inputs
• Order appropriate MIL-C-5015 terminated cable for monitor connection