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

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

When machinery vibration threatens uptime, the 190501-04-00-04 from Bently Nevada provides accurate velocity measurement. This Velomitor CT velocity transducer is engineered for industrial environments where reliability is non-negotiable. With a sensitivity of 3.94 mV/mm/s (±5%), it captures essential vibration data for predictive maintenance programs.

As part of the Velomitor CT series, this transducer offers a frequency response of 3.0 Hz to 900 Hz (±1.0 dB) and 1.5 Hz to 1.0 kHz (±3.0 dB). These specifications make it suitable for monitoring rotating equipment such as pumps, motors, and fans.

Key Features and Technical Specifications

The 190501-04-00-04 is built to deliver consistent performance under demanding conditions. Its key features include:

• 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
• Mounted resonant frequency: 9 kHz minimum (stud mounted)
• Operating temperature range: -40°C to +85°C
• Shock limit: 5000 g pk maximum
• Humidity limit: 100% condensing, non-submerged

These specifications ensure accurate vibration measurement even in harsh environments. The internal electronics are isolated from the case, reducing interference and improving signal integrity.

Applications and Use Cases

The 190501-04-00-04 is ideal for condition monitoring in industries such as oil and gas, power generation, and manufacturing. It can be mounted in any orientation, making it versatile for various machine configurations. For example, in a refinery, this transducer can monitor pump vibration to detect early signs of bearing wear, preventing costly unplanned downtime.

Its intrinsic safety approvals (Ex ia IIC T4, AEx ia IIC T4) allow installation in hazardous areas classified as Class I, Division 1, Groups A, B, C, D. This makes it a reliable choice for environments where flammable gases or vapors are present.

Installation and Mounting

Proper installation is critical for accurate measurements. The 190501-04-00-04 comes with a mounting hardware option of a 4 stud M6x1 with a 3/8-in 24 adapter. The mounting torque should be 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf). The transducer can be mounted at any angle, providing flexibility in tight spaces.

For best results, mount the transducer on a flat, clean surface to ensure proper coupling. The MIL-C-5015 connection interface simplifies wiring, and the maximum cable length of 305 meters (1,000 feet) allows remote monitoring without signal degradation.

Maintenance and Reliability

Regular inspection of the transducer and its mounting is recommended to maintain reliable operation. Check for any signs of physical damage or loose connections. The 316L stainless steel case provides excellent corrosion resistance, extending the service life in harsh environments.

Because the transducer has no moving parts, it requires minimal maintenance. However, periodic verification of the output bias voltage ensures the internal electronics are functioning correctly. This proactive approach helps avoid unexpected failures and reduces overall maintenance costs.

Compatibility and Integration

The 190501-04-00-04 is compatible with Bently Nevada monitoring systems that accept velocity transducer inputs. Its standard MIL-C-5015 connector and 10.1 Vdc bias voltage make it easy to integrate into existing vibration monitoring setups. For retrofit projects, it can replace older velocity transducers with similar specifications.

When integrating, ensure the monitoring system's input impedance matches the transducer's dynamic output impedance of less than 400 Ω to avoid signal loading.

Common Questions About the 190501-04-00-04

Q: What is the frequency response of the 190501-04-00-04?

A: The frequency response is 3.0 Hz to 900 Hz (±1.0 dB) and 1.5 Hz to 1.0 kHz (±3.0 dB).

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

A: Yes, it has intrinsic safety approvals including Ex ia IIC T4 and AEx ia IIC T4, suitable for Class I, Division 1, Groups A, B, C, D.

Q: What is the maximum cable length for the 190501-04-00-04?

A: The maximum cable length is 305 meters (1,000 feet) using 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).

Product Support and Availability

The 190501-04-00-04 is available through Petro Auto Tech. Contact our team for current pricing and lead times. We are ready to assist with your vibration monitoring needs.