190501-07-00-04 | Bently Nevada Velomitor CT Velocity Transducer

Introduction to the Bently Nevada 190501-07-00-04

In the evolution of industrial rotating machinery, accurate vibration measurement has become essential for predictive maintenance and asset protection. The 190501-07-00-04 from Bently Nevada addresses this need with a robust velocity transducer designed for harsh environments. As a Velomitor CT model, it converts mechanical vibration into an electrical signal that control systems can interpret, enabling early detection of bearing wear, unbalance, and misalignment.

This transducer is engineered for reliability, featuring a sensitivity of 3.94 mV/mm/s (±5%) and a frequency response from 3.0 Hz to 900 Hz (±1.0 dB). Its internal electronics are isolated from the case, reducing ground loop issues. With a broad operating temperature range of -40°C to +85°C, it suits demanding industrial applications.

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: 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 signal degradation.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Shock Limit: 5000 g pk, maximum.
• Case Material: 316L stainless steel.
• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf).
• Weight: <297 g (10.5 oz.), typical.

The transducer's amplitude linearity is ±2% to 63.5 mm/s pk (2.5 in/s pk), ensuring accurate readings across its range. Its mounted resonant frequency is 9 kHz minimum (stud mounted, except quick disconnect), which minimizes resonance interference.

Applications and Use Cases

In industrial settings, the 190501-07-00-04 is ideal for monitoring rotating equipment such as pumps, fans, compressors, and turbines. Its rugged design and intrinsic safety approvals make it suitable for hazardous areas, including Class I, Division 1 and Zone 0/1 environments. The transducer's ability to operate in condensing humidity (100% condensing, non-submerged) further extends its applicability to wet or washdown areas.

For example, in a petrochemical plant, this transducer can be mounted on a motor-driven pump to provide continuous vibration data. This data helps maintenance teams identify developing faults before they lead to unplanned downtime, thereby reducing repair costs and improving plant availability.

Installation and Setup

Proper installation is critical for accurate vibration measurement. The 190501-07-00-04 comes with a plate stud mounting option (3/8-in 24 to 3/8-in 24) and a MIL-C-5015 connection interface. Ensure the mounting surface is clean and flat to achieve the specified mounting torque of 4.5 N-m ± 0.6 N-m. The transducer can be mounted in any orientation, offering flexibility in tight spaces.

When connecting, note that Pin A goes positive with respect to Pin B when velocity is from base to top of the transducer. This polarity must be observed to ensure correct signal interpretation. For hazardous area installations, follow the provided drawing 167536 to maintain intrinsic safety compliance.

Maintenance and Reliability

Routine inspection of the transducer and its cable is recommended to ensure long-term reliability. Check for physical damage, loose mounting, or corrosion on the connector. The 316L stainless steel case provides excellent resistance to corrosive environments, reducing the need for frequent replacements.

Because the transducer has no moving parts, it offers high reliability and a long service life. However, periodic verification of the output bias voltage (10.1 Vdc ± 1.0 Vdc) can help detect any internal issues early. Always follow the manufacturer's guidelines for maintenance and calibration.

Compatibility and Integration

The 190501-07-00-04 is designed to work with Bently Nevada monitoring systems and other vibration monitoring equipment that accepts standard velocity transducer signals. Its low output impedance (<400 Ω) allows for long cable runs up to 305 metres without signal degradation, making it compatible with distributed control systems (DCS) and programmable logic controllers (PLC) that have analog input modules.

For hazardous area installations, the transducer carries intrinsic safety approvals (Ex ia IIC T4, AEx ia IIC T4) and non-incendive approvals (Ex nL IIC T4, AEx nA T4), ensuring compatibility with safety barriers and isolators.

Common Questions About the 190501-07-00-04

Q: What is the frequency response of the 190501-07-00-04?

A: The transducer has a frequency response of 3.0 Hz to 900 Hz (±1.0 dB) and 1.5 Hz to 1.0 kHz (±3.0 dB).

Q: Can the 190501-07-00-04 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 and Zone 0/1.

Q: What is the maximum cable length for this transducer?

A: The maximum cable length is 305 metres (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).

Q: What mounting options are available?

A: The 190501-07-00-04 includes a plate stud mounting option (3/8-in 24 to 3/8-in 24) and a MIL-C-5015 connection interface.

Product Support and Availability

The 190501-07-00-04 is available from Petro Auto Tech, a trusted industrial automation parts supplier. We maintain a ready inventory to support your maintenance and upgrade needs. Contact our team for current pricing and lead times.