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

Introduction: The Evolution of Vibration Monitoring

For decades, industrial facilities have relied on accurate vibration measurement to protect rotating machinery. Early systems were bulky and limited, but modern transducers like the 190501-00-00-04 have transformed condition monitoring. This Bently Nevada Velomitor CT velocity transducer offers a compact, rugged design that meets the demands of today's predictive maintenance programs. Its high sensitivity and wide frequency response enable early detection of bearing wear, unbalance, and misalignment, helping you avoid costly unplanned downtime.

Key Features & Technical Specifications

The 190501-00-00-04 is engineered for precision and durability. Below are the core specifications that define its performance:

• 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 Noise: 0.229 mm/s (0.009 in/s) pk
• 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)
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Shock Limit: 5000 g pk maximum
• Case Material: 316L stainless steel
• Weight: <297 g (10.5 oz.) typical

One distinctive feature is the base strain sensitivity of 0.43 mm/s/μstrain (0.017 in/s/μstrain). This low value ensures that mechanical strain on the mounting surface does not corrupt the vibration signal, providing cleaner data for analysis.

Applications & Use Cases

The 190501-00-00-04 is ideal for permanent vibration monitoring on fans, pumps, motors, and gearboxes. Its rugged construction and agency approvals (CSA/NRTL/C, ATEX/IECEx/CSA) make it suitable for hazardous areas, including Class I, Division 1 and Zone 0/1 environments. In these settings, reliable measurement is critical for safety and operational continuity. By integrating this transducer into your condition monitoring system, you gain continuous insight into machinery health, enabling proactive maintenance scheduling.

Installation & Setup

Proper installation is essential for accurate readings. The 190501-00-00-04 features a MIL-C-5015 connection interface and can be mounted in any orientation. The mounting surface should be 33 mm in diameter, and the recommended mounting torque is 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf). Ensure the mounting surface is clean and flat to avoid introducing strain. The transducer is internally isolated from the case, which helps prevent ground loops. For best results, follow the manufacturer's installation drawing 167536.

Maintenance & Reliability

Routine maintenance of the 190501-00-00-04 is minimal due to its solid-state design. However, periodic inspection is recommended to verify that the mounting remains secure and the connector is free from corrosion. The 316L stainless steel case withstands harsh environments, including 100% condensing humidity. With no moving parts, the transducer offers excellent long-term stability, reducing total cost of ownership. Its wide operating temperature range (-40°C to +85°C) ensures reliable performance in extreme conditions.

Compatibility & Integration

The 190501-00-00-04 is designed to work with Bently Nevada monitoring systems and can also interface with third-party data acquisition systems that accept standard velocity transducer inputs. The MIL-C-5015 connector is a common industrial standard, simplifying integration. Maximum cable length is 305 meters (1,000 ft) with part number 02173006, allowing flexible placement of monitoring electronics. This compatibility makes it a versatile choice for both new installations and retrofits.

Troubleshooting & Common Issues

If the output signal is erratic, first check the cable and connections for damage. Verify that the mounting torque is within specification, as loose mounting can cause false readings. Also, ensure the transducer is not subjected to temperatures beyond its rated limits. If the bias voltage is outside 10.1 Vdc ± 1.0 Vdc, the internal electronics may be faulty, and the unit should be replaced. For detailed diagnostics, consult the Bently Nevada manual or contact Petro Auto Tech.

FAQ

Q: What is the sensitivity of the 190501-00-00-04?

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

Q: Can the 190501-00-00-04 be used in hazardous areas?

A: Yes, it has ATEX/IECEx/CSA approvals for Class I, Division 1 and Zone 0/1.

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

A: Up to 305 meters (1,000 ft) of cable (part number 02173006) with no signal degradation.

Q: What is the operating temperature range?

A: -40°C to +85°C (-40°F to +185°F).

Q: Is the transducer grounded to the case?

A: No, the internal electronics are isolated from the case.

Product Support & Availability

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