190501-04-00-CN | Bently Nevada 100 mV/in/s Velocity Transducer

Introduction to the 190501-04-00-CN

When machinery vibration threatens uptime, the 190501-04-00-CN from Bently Nevada provides precise, real-time velocity measurement. 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 (100 mV/in/s) ±5%, it captures subtle changes in machine health, enabling early intervention.

Built in the U.S.A., this model features a stud M6x1 mounting with a 3/8-in 24 adapter, ensuring secure attachment to rotating equipment. The MIL-C-5015 connection interface simplifies wiring, while the country-specific agency approval option (CN) aligns with regional requirements. Weighing just 0.297 kg, it is lightweight yet robust, making it suitable for permanent installation on pumps, motors, and fans.

Key Features and Performance Metrics

The 190501-04-00-CN excels in demanding conditions. Its frequency response spans 3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB, with an extended range of 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB, covering most rotating machinery vibration signatures. This broad bandwidth allows operators to detect both low-speed and high-speed faults.

• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5%
• Frequency Response: 3.0 Hz to 900 Hz ±1.0 dB; 1.5 Hz to 1.0 kHz ±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)

These specs translate to reliable vibration data even in harsh environments. The internal electronics are isolated from the case, reducing ground loop interference. Maximum cable length reaches 305 metres (1,000 ft.) with part number 02173006, allowing flexible placement of monitoring systems.

Industry Applications and Use Cases

In petrochemical plants, the 190501-04-00-CN monitors critical rotating assets like compressors and turbines. Its rugged design withstands extreme temperatures from -40°C to +85°C (-40°F to +185°F), ensuring continuous operation in outdoor or unheated areas. The shock limit of 5000 g pk protects against sudden impacts, while 100% condensing humidity tolerance makes it suitable for washdown environments.

For predictive maintenance programs, this transducer provides the data needed to schedule repairs before failures occur. The amplitude linearity of ±2% up to 63.5 mm/s pk ensures accurate readings across a wide vibration range, helping engineers trend machine condition over time. Its low base strain sensitivity (0.43 mm/s/μstrain) minimizes false alarms caused by casing deformation.

Installation and Setup Guidance

Proper installation is key to accurate vibration measurement. The 190501-04-00-CN uses a stud M6x1 mounting with a 3/8-in 24 adapter; apply the specified mounting torque of 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf) to ensure a rigid connection. The transducer can be mounted in any orientation, simplifying placement on existing equipment.

Connect the MIL-C-5015 interface to your monitoring system using the recommended cable (part number 02173006). Keep cable runs under 305 metres to avoid signal degradation. Verify polarity: Pin A goes positive with respect to Pin B when velocity is from base to top of the transducer. This ensures correct phase interpretation in your analysis software.

Maintenance and Reliability Tips

Regular inspection of the 190501-04-00-CN helps maintain long-term reliability. Check the mounting stud for tightness periodically, as vibration can loosen connections over time. Inspect the cable for wear or damage, especially near the connector, and replace if necessary.

The 316L stainless steel case and connector resist corrosion, extending service life in aggressive environments. Since the internal electronics are isolated from the case, grounding issues are minimized. For best results, follow the manufacturer's manual for routine checks and calibration verification.

Compatibility and Integration

This transducer outputs a standard velocity signal compatible with most Bently Nevada monitors and third-party vibration monitoring systems. The dynamic output impedance of <400 Ω allows direct connection to data acquisition modules. The MIL-C-5015 connector is widely used in industrial settings, easing integration into existing wiring.

For hazardous areas, the 190501-04-00-CN with agency approval options 01 through 04 offers intrinsic safety ratings: Ex ia IIC T4 and AEx ia IIC T4 for Class I, Div 1, Groups A, B, C, D; Class II, Groups E, F, G; and Class III. Installation must follow drawing 167536, with temperature class T4 at -40°C ≤ Ta ≤ +100°C. This makes it suitable for explosive atmospheres when properly installed.

Frequently Asked Questions

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

A: The sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%, providing consistent output for vibration velocity measurements.

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

A: Yes, with agency approval options 01 through 04, it is intrinsically safe (Ex ia IIC T4) and non-incendive (Ex nL IIC T4), per drawing 167536.

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

A: Up to 305 metres (1,000 ft.) of cable (part number 02173006) can be used without signal degradation.

Q: What mounting torque is recommended?

A: Apply 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf) for secure mounting.

Q: What is the operating temperature range?

A: The operating temperature range is -40°C to +85°C (-40°F to +185°F).

Product Support and Availability

The 190501-04-00-CN is available through Petro Auto Tech, your trusted industrial automation parts supplier. We ensure genuine Bently Nevada products with reliable delivery. Contact our team for current stock and lead times.