190501-11-00-04 | Bently Nevada 3.94 mV/mm/s Velomitor CT Transducer

What Makes the 190501-11-00-04 a Reliable Choice for Vibration Monitoring?

When rotating machinery must run without unexpected downtime, accurate vibration measurement is essential. The 190501-11-00-04 from Bently Nevada is a Velomitor CT velocity transducer engineered to capture velocity signals with precision. This sensor helps maintenance teams detect early signs of mechanical wear, misalignment, or imbalance before they escalate into costly failures.

With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, the transducer converts mechanical velocity into a proportional electrical signal. This consistent output simplifies integration with monitoring systems, allowing engineers to trend vibration data over time and set meaningful alarm thresholds.

Key Features and Technical 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.
• 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).
• Maximum Cable Length: 305 metres (1,000 ft.) of cable (part number 02173006) with no degradation of signal.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Storage Temperature: -40°C to +100°C (-40°F to +212°F).
• Shock Limit: 5000 g pk, maximum.
• Humidity Limit: 100% condensing, non-submerged.
• Magnetic Field Susceptibility: <0.0068 mm/s/gauss (0.268 mil/s/gauss) @ 50 gauss, 50-60Hz.
• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf).
• Case Material: 316L stainless steel.
• Connector: 2-pin 316L stainless steel MIL-C-5015, top.

These specifications show a transducer built for demanding industrial environments. The 316L stainless steel case resists corrosion, while the sealed connector protects against moisture. The wide temperature range ensures stable operation in both hot and cold climates.

Applications and Use Cases

In industries such as power generation, oil and gas, and manufacturing, the 190501-11-00-04 is often installed on pumps, fans, compressors, and motors. Because it measures absolute velocity, it is well suited for machinery where casing vibration is a key indicator of health. The transducer's low base strain sensitivity means it can be mounted on surfaces that may experience slight deformation without affecting the reading.

For example, on a large cooling fan, the sensor can detect unbalance or bearing wear early. This allows maintenance teams to schedule repairs during planned outages, avoiding unplanned shutdowns. Similarly, on a centrifugal pump, the transducer helps monitor vibration levels that could indicate cavitation or misalignment.

Installation and Setup

Proper installation is critical for accurate vibration data. The 190501-11-00-04 comes with a plate stud mounting option (3/8-in 24 to 1/4-in 28). Use the specified mounting torque of 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf) to secure the transducer. Over-tightening can stress the case, while under-tightening may cause resonance.

The transducer can be mounted in any orientation, offering flexibility for tight spaces. The MIL-C-5015 connection interface provides a rugged, reliable electrical connection. Ensure the mating connector is clean and properly seated to avoid signal loss.

For best results, mount the transducer on a flat, machined surface. The mounting surface diameter is 33 mm (1.3 in). Clean the area before installation to remove any debris that could affect the contact.

Maintenance and Reliability

Because the 190501-11-00-04 has no moving parts, it requires minimal maintenance. However, periodic inspection is still recommended. Check the mounting stud for tightness and inspect the connector for signs of corrosion or damage. The 316L stainless steel case is highly resistant to corrosion, but in aggressive chemical environments, regular visual checks are prudent.

The transducer's internal electronics are isolated from the case, which helps prevent ground loops. This isolation also enhances signal integrity over long cable runs. With a maximum cable length of 305 metres (1,000 ft.), you can place the monitoring system away from the machine without signal degradation.

Compatibility and Integration

The 190501-11-00-04 is designed to work with Bently Nevada monitoring systems and other vibration monitoring equipment that accept velocity transducer inputs. The output bias voltage of 10.1 Vdc and dynamic output impedance of <400 Ω make it compatible with many standard data acquisition systems. Always verify compatibility with your specific monitor before installation.

Frequently Asked Questions

Q: What is the sensitivity of the 190501-11-00-04?

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

Q: What is the operating temperature range?

A: The transducer operates from -40°C to +85°C (-40°F to +185°F).

Q: What is the maximum cable length?

A: The maximum cable length is 305 metres (1,000 ft.) using cable part number 02173006.

Q: What is the mounting torque requirement?

A: The recommended mounting torque is 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf).

Q: Is the 190501-11-00-04 suitable for hazardous areas?

A: Yes, the agency approval option 04 includes CSA/NRTL/C (Class I, Division 1) and ATEX/IECEx/CSA (Class I, Zone 0/1) certifications.

Product Support and Availability

The 190501-11-00-04 is available through Petro Auto Tech. Contact our team for current pricing and lead times. We are ready to help you source this reliable vibration transducer for your maintenance needs.