190501-01-99-CN | Bently Nevada 3.94 mV/mm/s Velocity Transducer

Introduction to the Bently Nevada 190501-01-99-CN

When machinery vibration threatens uptime, the 190501-01-99-CN from Bently Nevada provides accurate, real-time data. This Velomitor CT velocity transducer is engineered for industrial rotating equipment. It converts mechanical velocity into an electrical signal for condition monitoring systems. Consequently, maintenance teams can detect faults early and avoid costly downtime.

This model features a stud mounting option (3/8-in 24 to 3/8-in 24) and includes a 32-foot cable. The agency approval option is country-specific (CN). Weighing only 0.297 kg, it is compact and easy to install in tight spaces. Its 316L stainless steel case ensures durability in harsh environments.

Key Features and Technical Specifications

The 190501-01-99-CN offers performance parameters that support precise vibration analysis. Below are the essential 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.
• Temperature Sensitivity: -8% to +5% typical over the operating temperature range.
• Transverse Response: Less than 5% of 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 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 enable accurate vibration measurement across a wide frequency range. The low output impedance (<400 Ω) ensures signal integrity over long cable runs. Therefore, the transducer suits remote monitoring installations.

Environmental Durability and Mechanical Design

The 190501-01-99-CN operates reliably in demanding conditions. Its environmental limits include:

• 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.

Mechanically, the transducer features a 33 mm diameter mounting surface and a height of 82 mm. The case is 316L stainless steel, and the connector is a 2-pin 316L stainless steel MIL-C-5015 top-mounted type. Mounting torque is 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf). Polarity is defined: Pin A goes positive with respect to Pin B when velocity is from base to top. The mounting angle can be any orientation, offering installation flexibility.

Applications and Use Cases

This velocity transducer is ideal for monitoring rotating machinery such as pumps, motors, fans, and compressors. Its frequency response covers typical machine vibration frequencies, enabling detection of imbalance, misalignment, and bearing wear. For example, in a petrochemical plant, the 190501-01-99-CN can be mounted on a pump to provide continuous vibration data. This data helps predict failures before they cause production stoppages. Additionally, its rugged construction suits outdoor and washdown environments.

Installation and Setup Guidance

Proper installation is critical for accurate readings. The stud mounting option (3/8-in 24 thread) requires a clean, flat surface. Apply the specified mounting torque (4.5 N-m ± 0.6 N-m) to ensure a secure fit. The included 32-foot cable simplifies wiring; however, you can extend it up to 305 meters using approved cable (part number 02173006). Ensure the cable is routed away from high-voltage lines to avoid interference. Finally, verify the polarity: Pin A positive with respect to Pin B for base-to-top velocity.

Maintenance and Reliability

Routine inspection of the transducer and its mounting is recommended. Check for any loosening of the stud or damage to the cable. The sealed 316L stainless steel case protects internal electronics from moisture and corrosion. As a result, the transducer offers long service life with minimal upkeep. Its internal electronics are isolated from the case, reducing ground loop issues. For best performance, periodically verify the output bias voltage (10.1 Vdc ± 1.0 Vdc) using a multimeter.

Comparison with Similar Transducers

Compared to accelerometers, velocity transducers provide direct velocity output without integration, which can simplify signal processing. The 190501-01-99-CN offers a sensitivity of 3.94 mV/mm/s, which is standard for industrial velocity sensors. Its frequency response of 1.5 Hz to 1.0 kHz covers most rotating machinery. In contrast, some accelerometers have higher frequency ranges but may require integration for velocity data. Thus, this transducer is a practical choice for velocity-based monitoring.

FAQ

Q: What is the sensitivity of the 190501-01-99-CN?

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

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

A: The maximum cable length is 305 meters (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: Does the 190501-01-99-CN have any agency approvals?

A: This model has a country-specific approval (CN). For detailed certification information, refer to the official datasheet or contact Petro Auto Tech.

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).

Product Support and Availability

The 190501-01-99-CN is available from Petro Auto Tech, an industrial automation parts supplier. We ensure genuine Bently Nevada products with reliable delivery. For technical assistance or ordering information, contact our team. We are ready to support your vibration monitoring needs.