190501-01-00-01 | Bently Nevada Velocity Transducer 3.94 mV/mm/s

Introduction: Solving Vibration Measurement Challenges

When rotating machinery operates under demanding conditions, accurate vibration monitoring is essential to prevent unplanned downtime. The 190501-01-00-01 from Bently Nevada is a Velomitor CT velocity transducer engineered to deliver reliable performance in harsh industrial environments. This sensor provides a direct velocity output, enabling early detection of mechanical faults such as unbalance, misalignment, and bearing wear.

With a sensitivity of 3.94 mV/mm/s (±5%), the transducer converts mechanical vibration into a proportional electrical signal. This allows maintenance teams to trend machine health and schedule repairs proactively, reducing costly failures and extending equipment life.

Key Features & Technical Specifications

The 190501-01-00-01 is built to meet rigorous industrial standards. Its 316L stainless steel case and MIL-C-5015 connector ensure durability in corrosive and hazardous areas. Below are the core specifications:

• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5%
• Frequency Response: 3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB; 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB
• Temperature Sensitivity: -8% to +5% typical over operating temperature range
• Transverse Response: Less than 5% of axial sensitivity
• Amplitude Linearity: ±2% to 63.5 mm/s pk (2.5 in/s pk)
• Mounted Resonant Frequency: 9 kHz minimum (stud mounted)
• Output Bias Voltage: 10.1 Vdc ± 1.0 Vdc, Pin A referenced to Pin B
• Dynamic Output Impedance: <400 Ω typical
• Broadband Noise: 0.229 mm/s (0.009 in/s) pk
• Base Strain Sensitivity: 0.43 mm/s/μstrain (0.017 in/s/μstrain)
• Grounding: Internal electronics isolated from case
• Maximum Cable Length: 305 meters (1,000 ft) with part number 02173006

These specifications make the 190501-01-00-01 a versatile choice for permanent vibration monitoring on pumps, fans, compressors, and turbines.

Real-World Applications

In petrochemical plants, the 190501-01-00-01 is often installed on critical rotating equipment to provide continuous vibration data. For example, a refinery may mount the transducer on a cooling water pump to detect bearing degradation before it leads to catastrophic failure. Similarly, in power generation, the sensor helps monitor turbine vibrations, ensuring safe operation within design limits.

Because the transducer is certified for hazardous areas (Class I, Division 1, Groups A, B, C, D; Class II, Groups E, F, G; Class III), it can be used in explosive atmospheres without compromising safety. Its wide operating temperature range (-40°C to +85°C) allows deployment in extreme climates, from Arctic installations to desert facilities.

Installation & Setup

Proper installation is critical for accurate vibration measurement. The 190501-01-00-01 features a 3/8-in 24 stud mounting option, which provides a rigid connection to the machine surface. Ensure the mounting surface is clean and flat to achieve the specified resonant frequency of 9 kHz minimum.

Apply the recommended mounting torque of 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf) to secure the transducer. The MIL-C-5015 connection interface simplifies wiring, and the internal electronics are isolated from the case, reducing ground loop issues. For optimal signal integrity, use the specified cable (part number 02173006) up to 305 meters without signal degradation.

Maintenance & Reliability

Regular inspection of the transducer and its mounting is recommended to ensure long-term accuracy. Check for any physical damage, loose mounting, or corrosion, especially in harsh environments. The 316L stainless steel case provides excellent resistance to corrosive agents, but periodic cleaning with a mild detergent and water is advisable (avoid harsh solvents).

Because the 190501-01-00-01 has no moving parts, it offers high reliability with minimal maintenance. Its solid-state design eliminates wear, reducing lifecycle costs compared to older piezoelectric accelerometers that may require recalibration. By investing in this transducer, you reduce the risk of unexpected downtime and extend the service life of your machinery.

Compatibility & Integration

The 190501-01-00-01 is designed to work with Bently Nevada monitoring systems, such as the 3500 series and SCOUT200. Its output bias voltage of 10.1 Vdc is compatible with standard data acquisition systems. The transducer can be integrated into existing vibration monitoring networks, providing seamless data collection for predictive maintenance programs.

For hazardous area installations, the transducer meets Ex ia IIC T4 and AEx ia IIC T4 requirements, allowing use with approved intrinsic safety barriers. Always follow the installation drawing 167536 to maintain safety certifications.

Troubleshooting Common Issues

If the transducer output is erratic, first check the cable connection and ensure the MIL-C-5015 connector is properly seated. Verify that the mounting torque is within specification, as a loose mount can cause spurious signals. If the output bias voltage is outside 10.1 Vdc ± 1.0 Vdc, the transducer may be damaged and should be replaced.

For persistent issues, consult the Bently Nevada manual or contact Petro Auto Tech for technical support. Our team can help diagnose installation problems and recommend corrective actions.

FAQs

Q: What is the sensitivity of the 190501-01-00-01?

A: The sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%, providing a linear output proportional to vibration velocity.

Q: Can this transducer be used in hazardous areas?

A: Yes, it is certified for Class I, Division 1, Groups A, B, C, D; Class II, Groups E, F, G; Class III, and meets Ex ia IIC T4 and AEx ia IIC T4 standards.

Q: What is the maximum cable length?

A: The maximum cable length is 305 meters (1,000 ft) using cable part number 02173006, with no signal degradation.

Q: What is the operating temperature range?

A: The operating temperature range is -40°C to +85°C (-40°F to +185°F), making it suitable for extreme environments.

Q: How should I mount the transducer?

A: Use the 3/8-in 24 stud mounting option and apply a torque of 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf) for optimal performance.

Product Support & Availability

The 190501-01-00-01 is available from Petro Auto Tech. We stock this transducer and can ship it promptly to minimize your downtime. Contact our team for pricing and lead times, or to discuss your specific application requirements.