190501-04-00-CN | Bently Nevada 3.94 mV/mm/s Velocity Transducer

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

When machine vibration threatens uptime, the 190501-04-00-CN from Bently Nevada provides accurate, repeatable measurements. This Velomitor CT velocity transducer converts mechanical motion into a proportional electrical signal, enabling condition monitoring teams to detect developing faults early. With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, the transducer delivers consistent output across a wide range of rotating machinery. Its robust design minimizes maintenance needs, reducing total cost of ownership over the equipment's service life.

Key Features and Technical Specifications

The 190501-04-00-CN is engineered for demanding industrial environments. Its key parameters include:

• 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 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)
• 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 metres (1,000 ft.) with part number 02173006
• 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
• Weight: <297 g (10.5 oz.) typical
• Mounting Surface: 33 mm diameter (1.3 in diameter)
• Height: 82 mm (3.2 in)
• Case Material: 316L stainless steel
• Connector: 2-pin 316L stainless steel MIL-C5015, top
• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf)
• Polarity: Pin A goes positive with respect to Pin B when velocity is from base to top
• Mounting Angle: Any orientation

These specifications directly impact lifecycle costs. For instance, the wide frequency response ensures accurate detection of both low-speed and high-speed faults, reducing false alarms and unnecessary maintenance. The low transverse response minimizes cross-axis errors, improving measurement reliability and reducing the risk of misdiagnosis.

Applications and Use Cases

The 190501-04-00-CN is suitable for vibration monitoring on rotating equipment such as pumps, motors, fans, and compressors. Its rugged construction and wide temperature range make it ideal for outdoor or harsh process environments. For example, in a petrochemical plant, the transducer can be mounted on a critical pump to provide continuous velocity data. This data helps maintenance teams schedule repairs based on actual condition rather than fixed intervals, leading to significant cost savings through reduced downtime and optimized spare parts inventory.

Installation and Setup

Proper installation is essential for accurate readings. The transducer features a stud M6x1 mounting option with a 3/8-in 24 adapter (option 04). The mounting torque should be 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf) to ensure a secure and stable attachment. The connection interface is MIL-C-5015, which provides a reliable, industry-standard connection. The internal electronics are isolated from the case, reducing the risk of ground loops. For best results, mount the transducer on a flat, clean surface and avoid excessive cable strain. The maximum cable length of 305 metres (1,000 ft.) allows flexible placement of monitoring equipment without signal degradation.

Maintenance and Reliability

Routine inspection of the transducer and its mounting is recommended to ensure long-term reliability. Check the mounting torque periodically, as vibration can loosen fittings over time. Verify the cable and connector for damage, especially in high-moisture environments. The 316L stainless steel case provides excellent corrosion resistance, reducing the need for frequent replacement. By following these simple steps, users can extend the service life of the 190501-04-00-CN and avoid unexpected failures. This proactive approach translates into lower maintenance costs and higher equipment availability.

Compatibility and Integration

The 190501-04-00-CN is designed to work with Bently Nevada monitoring systems and other data acquisition equipment that accepts velocity transducer inputs. Its standard MIL-C-5015 connector ensures compatibility with existing cabling infrastructure. The output bias voltage of 10.1 Vdc and dynamic impedance of <400 Ω allow direct connection to most vibration monitors. For seamless integration, verify that your monitoring system supports the transducer's sensitivity and frequency response. If you need assistance, contact Petro Auto Tech for guidance on compatible components.

FAQ

What is the sensitivity of the 190501-04-00-CN?

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

What is the operating temperature range?

The transducer operates from -40°C to +85°C (-40°F to +185°F).

What is the maximum cable length?

Up to 305 metres (1,000 ft.) of cable (part number 02173006) without signal degradation.

What mounting options are available?

Option 04 provides a stud M6x1 with a 3/8-in 24 adapter.

Is the transducer intrinsically safe?

Agency approval options 01 through 04 include intrinsic safety ratings (Ex ia IIC T4, AEx ia IIC T4) for hazardous areas.

Product Support and Availability

The 190501-04-00-CN is available through Petro Auto Tech. Contact our team to confirm stock and lead times. We are committed to providing genuine Bently Nevada parts with fast delivery.