190501-04-00-CN | Bently Nevada Velomitor CT Velocity Transducer

Introduction to the Bently Nevada 190501-04-00-CN

When machine vibration threatens uptime, the 190501-04-00-CN from Bently Nevada provides a dependable measurement solution. This Velomitor CT velocity transducer is engineered for industrial environments where accuracy and durability are non-negotiable. With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, it delivers consistent performance for predictive maintenance programs.

As a result, maintenance teams can detect developing faults early, reducing unplanned downtime and extending equipment life. The transducer’s robust design, including a 316L stainless steel case, ensures long-term reliability even in harsh conditions.

Key Features and Technical Specifications

The 190501-04-00-CN offers a range of specifications that make it suitable for critical rotating machinery. Below are the core parameters you can expect:

• 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 the operating temperature range.
• Transverse Response: Less than 5% of the axial sensitivity.
• Amplitude Linearity: ±2% to 63.5 mm/s pk (2.5 in/s pk).
• Mounted Resonant Frequency: 9 kHz, minimum (stud mounted, except quick disconnect).
• Output Bias Voltage: 10.1 Vdc ± 1.0 Vdc, Pin A referenced to Pin B.
• Dynamic Output Impedance: <400 Ω typical.
• Broadband: 0.229 mm/s (0.009 in/s) pk.
• Base Strain Sensitivity: 0.43 mm/s/μstrain (0.017 in/s/μstrain).

One distinctive spec is the base strain sensitivity of 0.43 mm/s/μstrain. This low value means the transducer is less affected by mechanical strain on the mounting surface, which is critical for accurate vibration readings in real-world installations.

Applications and Use Cases

The 190501-04-00-CN is ideal for monitoring rotating equipment such as pumps, motors, fans, and compressors. Its frequency response covers typical machine vibration ranges, making it a versatile choice for condition monitoring. For instance, in a petrochemical plant, this transducer can be mounted on a critical pump to provide continuous velocity data, helping to schedule maintenance before failure occurs.

Furthermore, the transducer’s wide operating temperature range of -40°C to +85°C allows deployment in both cold and hot environments. Consequently, it suits outdoor installations and process areas where temperature extremes are common.

Installation and Mounting Guide

Proper installation is essential for accurate measurements. The 190501-04-00-CN includes a stud M6x1 with a 3/8-in 24 adapter for mounting. Ensure the mounting surface is clean and flat to achieve optimal coupling. The recommended mounting torque is 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf).

The transducer can be mounted in any orientation, offering flexibility in tight spaces. Its 2-pin 316L stainless steel MIL-C5015 connector provides a secure electrical connection. For signal integrity, the maximum cable length is 305 meters (1,000 ft.) using part number 02173006, with no signal degradation.

Maintenance and Reliability

Routine inspection of the transducer and its mounting is recommended to ensure consistent performance. Check for any signs of physical damage or loose mounting, as these can affect readings. The internal electronics are isolated from the case, reducing the risk of ground loops.

With a shock limit of 5000 g pk and 100% condensing humidity tolerance, the 190501-04-00-CN is built to withstand demanding conditions. This durability translates to lower replacement costs and reduced downtime, offering a strong return on investment.

Compatibility and Integration

The 190501-04-00-CN is designed to work with Bently Nevada monitoring systems, but its standard analog output (velocity signal) allows integration with most data acquisition systems. The output bias voltage of 10.1 Vdc is typical for industrial sensors, ensuring compatibility with common input modules.

For hazardous area installations, the transducer carries intrinsic safety approvals (Ex ia IIC T4 and AEx ia IIC T4) for Class I, Div 1, Groups A, B, C, D; Class II, Groups E, F, G; and Class III. This makes it suitable for use in explosive atmospheres when installed per drawing 167536.

Troubleshooting Common Issues

If you experience erratic readings, first check the cable connection and integrity. The maximum cable length is 305 meters; longer runs may degrade the signal. Also, verify that the mounting torque is within specification to avoid resonance issues.

Another common issue is electrical noise. Since the transducer’s internal electronics are isolated from the case, ensure that the mounting surface is not introducing ground loops. If problems persist, consult the official Bently Nevada documentation or contact Petro Auto Tech for support.

Frequently Asked Questions

What is the sensitivity of the 190501-04-00-CN?

The sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%.

Can the 190501-04-00-CN be used in hazardous areas?

Yes, it has intrinsic safety approvals (Ex ia IIC T4 and AEx ia IIC T4) for Class I, Div 1, Groups A, B, C, D; Class II, Groups E, F, G; and Class III.

What is the maximum cable length for this transducer?

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

What is the operating temperature range?

The operating temperature range is -40°C to +85°C (-40°F to +185°F).

Product Support and Availability

The 190501-04-00-CN is available through Petro Auto Tech, an industrial automation parts supplier. We ensure prompt shipping and reliable service. Contact us for current availability and pricing.