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 the precise measurement you need. This Velomitor CT velocity transducer is engineered for industrial environments where accuracy and durability are non-negotiable. With a sensitivity of 3.94 mV/mm/s (±5%), it converts mechanical velocity into a clear electrical signal, enabling early detection of bearing wear, unbalance, and misalignment.

As part of Bently Nevada's trusted Velomitor CT series, this model is built in the U.S.A. and designed for continuous operation. Its robust 316L stainless steel case and 2-pin MIL-C-5015 connector ensure long-term reliability in harsh conditions. Whether you are monitoring pumps, fans, or turbines, the 190501-01-99-CN delivers the performance you expect from a leading industrial sensor.

Key Features and Technical Specifications

The 190501-01-99-CN offers a range of specifications that make it suitable for demanding vibration monitoring applications. Below are the core parameters extracted from the official datasheet:

• 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 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: 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 metres (1,000 ft) of cable (part number 02173006) with no signal degradation

One standout feature is the maximum cable length of 305 metres. This allows the transducer to be placed far from the monitoring system without signal loss, offering flexibility in large industrial plants. Additionally, the internal electronics are isolated from the case, reducing the risk of ground loops and electrical interference.

Environmental Durability and Mechanical Design

The 190501-01-99-CN is built to withstand extreme 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 weighs less than 297 g (10.5 oz) and features a mounting surface of 33 mm diameter (1.3 in). Its height is 82 mm (3.2 in), and the case is made of 316L stainless steel, providing excellent corrosion resistance. The 2-pin 316L stainless steel MIL-C-5015 connector is located on top, and the mounting torque is specified as 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf). The polarity is defined so that Pin A goes positive with respect to Pin B when velocity is from base to top. The transducer can be mounted in any orientation, offering installation flexibility.

Applications and Use Cases

The 190501-01-99-CN is ideal for vibration monitoring in rotating machinery such as motors, pumps, compressors, and fans. Its frequency response covers a wide range, making it suitable for both low-speed and high-speed equipment. For example, in a paper mill, this transducer can be installed on a dryer roll to detect bearing degradation early, preventing costly unplanned downtime. Similarly, in a chemical plant, it can monitor agitator shafts to ensure smooth operation. The robust design and long cable capability make it a practical choice for remote monitoring stations.

Installation and Setup

Proper installation is crucial for accurate vibration measurement. The 190501-01-99-CN comes with a stud mounting option (3/8-in 24 to 3/8-in 24) and includes a 32-foot cable (connection option 99). When mounting, ensure the mounting surface is clean and flat. Apply the specified torque of 4.5 N-m ± 0.6 N-m to achieve a secure fit. The transducer can be oriented in any direction, but for best results, mount it so that the measurement axis aligns with the direction of vibration. Refer to the installation drawing 167536 for detailed guidance, especially for hazardous area installations.

Maintenance and Reliability

To maintain reliable performance, inspect the transducer periodically for physical damage or corrosion. Check the cable and connector for wear or loose connections. Since the internal electronics are isolated from the case, grounding is simplified, but ensure the mounting stud is properly grounded to avoid interference. The 316L stainless steel case resists corrosion, but in highly aggressive environments, regular visual checks are recommended. For safety-related applications, always follow the manufacturer's maintenance manual.

Compatibility and Integration

The 190501-01-99-CN is designed to work with Bently Nevada monitoring systems. Its output is a standard velocity signal that can be connected to compatible monitors or data acquisition systems. The maximum cable length of 305 metres allows flexible placement of the transducer relative to the monitoring equipment. For integration, ensure the input impedance of the monitoring device is compatible with the transducer's dynamic output impedance of less than 400 Ω. Always consult the system documentation to confirm compatibility.

Troubleshooting and Common Issues

If you encounter erratic readings, first check the cable and connector for damage. Verify that the mounting torque is correct and that the transducer is securely attached. If the output bias voltage is not within 10.1 Vdc ± 1.0 Vdc, the transducer may be faulty. Also, confirm that the environmental conditions are within the specified limits, especially temperature and humidity. For persistent issues, contact Petro Auto Tech for technical support.

FAQ about the 190501-01-99-CN

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

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

What is the maximum cable length for this transducer?

The maximum cable length is 305 metres (1,000 ft) using cable 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).

Is the 190501-01-99-CN suitable for hazardous areas?

Yes, the 190501-01-99-CN has agency approvals for intrinsic safety (Ex ia IIC T4) and non-incendive (Ex nL IIC T4) per the datasheet.

What mounting hardware is included?

The mounting hardware option is a stud 3/8-in 24 to 3/8-in 24.

Product Support and Availability

The Bently Nevada 190501-01-99-CN is available through Petro Auto Tech. We stock this transducer and can ship it promptly to minimize your downtime. For technical assistance or ordering information, contact our team. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.