190501-08-99-04 | Bently Nevada Velomitor CT Velocity Transducer

Introduction to the 190501-08-99-04

When machinery vibration threatens uptime, the 190501-08-99-04 from Bently Nevada provides precise, real-time velocity measurement. This Velomitor CT velocity transducer is engineered for industrial environments where accuracy and durability directly impact maintenance costs and production continuity.

With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, the transducer converts mechanical vibration into a clear electrical signal. Its frequency response spans 3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB, and extends to 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB, covering the critical range for rotating equipment.

Built in the U.S.A., this model includes a 32-foot cable and a plate stud mounting option (3/8-in 24 to 1/2-in 20). The 190501-08-99-04 is part of the trusted Bently Nevada family, designed for long service life and minimal maintenance.

Key Features and Technical Specifications

The 190501-08-99-04 offers a set of performance parameters that support reliable monitoring and cost-effective operation:

• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5% ensures accurate velocity measurement.
• Frequency Response: 3.0 Hz to 900 Hz ±1.0 dB; 1.5 Hz to 1.0 kHz ±3.0 dB covers typical machine vibration.
• Temperature Sensitivity: -8% to +5% typical over the operating range, minimizing drift.
• Transverse Response: Less than 5% of axial sensitivity, reducing cross-axis errors.
• Amplitude Linearity: ±2% to 63.5 mm/s pk (2.5 in/s pk) for reliable readings.
• Mounted Resonant Frequency: 9 kHz minimum (stud mounted), avoiding interference in most applications.
• 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, no signal degradation.

These specs translate into fewer false alarms and less downtime, which means lower maintenance costs over the equipment's life.

Environmental and Mechanical Durability

The 190501-08-99-04 is built to withstand harsh conditions, reducing replacement frequency and total cost of ownership:

• 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, 50-60 Hz.
• Case Material: 316L stainless steel, corrosion-resistant.
• Connector: 2-pin 316L stainless steel MIL-C5015, top-mounted.
• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf).
• Weight: <297 g (10.5 oz), typical.
• Mounting Surface Diameter: 33 mm (1.3 in).
• Height: 82 mm (3.2 in).

This rugged design minimizes the need for spares and reduces unplanned maintenance, directly improving your bottom line.

Applications and Use Cases

The 190501-08-99-04 is ideal for monitoring rotating machinery such as pumps, fans, compressors, and turbines. In these applications, early detection of vibration anomalies prevents catastrophic failures and costly downtime.

For example, in a continuous process plant, a sudden increase in vibration can indicate bearing wear. By catching this early, maintenance can be scheduled during planned outages, avoiding emergency repairs and production losses.

Furthermore, the transducer's wide frequency response and low transverse sensitivity make it suitable for both low-speed and high-speed equipment, offering flexibility across different asset classes.

Installation and Setup

Proper installation is key to accurate readings and long service life. The 190501-08-99-04 mounts using a plate stud (3/8-in 24 to 1/2-in 20) and can be oriented in any direction, simplifying placement.

Apply the recommended mounting torque of 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf) to ensure a secure fit without damaging the transducer. The included 32-foot cable provides flexibility in routing, and the maximum cable length of 305 meters (1,000 ft) allows remote monitoring without signal loss.

For hazardous areas, the agency approval options (CSA/NRTL/C, ATEX/IECEx/CSA) require installation per drawing 167536. Always follow the manufacturer's guidelines and local regulations.

Maintenance and Reliability

Regular inspection of the transducer and its cable is recommended to ensure consistent performance. Check for physical damage, loose connections, and signs of corrosion, especially in harsh environments.

The 316L stainless steel case and internal isolation from ground reduce the risk of electrical interference and corrosion, extending the service life. With proper care, the 190501-08-99-04 can provide years of reliable data, reducing the total cost of ownership compared to less durable alternatives.

Compatibility and Integration

The 190501-08-99-04 is designed to work with Bently Nevada monitoring systems and can be integrated into existing vibration monitoring networks. Its output bias voltage and impedance characteristics are compatible with standard data acquisition systems.

For specific compatibility details, refer to the official Bently Nevada documentation or contact Petro Auto Tech for expert guidance.

Frequently Asked Questions

What is the sensitivity of the 190501-08-99-04?

The sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%, ensuring accurate velocity measurement.

Can the 190501-08-99-04 be used in hazardous areas?

Yes, with agency approval option 04, it is certified for CSA/NRTL/C (Class I, Division 1) and ATEX/IECEx/CSA (Class I, Zone 0/1).

What is the maximum cable length for this transducer?

The maximum cable length is 305 meters (1,000 ft) using 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 190501-08-99-04 is available through Petro Auto Tech, your trusted industrial automation parts supplier. Contact us for current pricing and lead times. Please verify lifecycle status and availability with Petro Auto Tech before ordering.