190501-08-99-04 | Bently Nevada Velomitor CT Transducer

Introduction to the Bently Nevada 190501-08-99-04

In the evolving landscape of industrial machinery protection, accurate vibration measurement is not just a preference—it is a necessity. The 190501-08-99-04 from Bently Nevada stands as a testament to decades of engineering refinement. As a Velomitor CT velocity transducer, it converts mechanical velocity into an electrical signal, enabling predictive maintenance and reducing unplanned downtime. This model, manufactured in the U.S.A., is designed for harsh environments and demanding applications.

With a sensitivity of 3.94 mV/mm/s (±5%), the transducer captures subtle vibrations that could indicate developing faults. Its frequency response spans 3.0 Hz to 900 Hz (±1.0 dB), covering the critical range for rotating machinery. The included 32-foot cable simplifies installation, while the plate stud mounting option ensures a secure fit. For engineers seeking a reliable, long-term solution, the 190501-08-99-04 offers a compelling blend of performance and durability.

Key Features and Technical 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.
• 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).
• Maximum Cable Length: 305 meters (1,000 ft.) of cable (part number 02173006) with no signal degradation.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Shock Limit: 5000 g pk, maximum.
• Case Material: 316L stainless steel.

The transducer's internal electronics are isolated from the case, reducing ground loop interference. Its transverse response is less than 5% of axial sensitivity, ensuring accurate axial measurements. The mounted resonant frequency is 9 kHz minimum (stud mounted), providing a wide usable bandwidth.

Cost-Benefit and ROI Considerations

Investing in the 190501-08-99-04 yields tangible returns over its service life. Its robust construction minimizes replacement frequency, while the high sensitivity detects faults early, preventing catastrophic failures. The 316L stainless steel case withstands corrosive environments, reducing maintenance costs. Furthermore, the extended cable length capability eliminates the need for additional signal conditioning, saving on installation expenses.

Compared to cheaper alternatives, the 190501-08-99-04 offers superior accuracy and reliability, translating to fewer false alarms and missed detections. For plants where unplanned downtime costs thousands per hour, this transducer pays for itself quickly. Its agency approvals (CSA/NRTL/C, ATEX/IECEx/CSA) ensure compliance in hazardous areas, avoiding costly retrofits.

Installation and Setup

Proper installation is critical for optimal performance. The mounting hardware option 08 provides a plate stud 3/8-in 24 to 1/2-in 20, allowing secure attachment to machinery. The connection option 99 includes a 32-foot cable, simplifying wiring. Mounting torque should be 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf) to ensure a solid mechanical bond.

The transducer can be mounted in any orientation, offering flexibility in tight spaces. Its mounting surface is 33 mm diameter (1.3 in), and the height is 82 mm (3.2 in). For hazardous locations, follow the installation drawing 167536 to maintain intrinsic safety. Always verify polarity: Pin A goes positive with respect to Pin B when velocity is from base to top.

Maintenance and Reliability

Routine inspection of the transducer and its cable is recommended to ensure long-term reliability. Check for physical damage, loose connections, or corrosion. The 316L stainless steel case resists most chemicals, but periodic cleaning with a soft cloth is advisable. The transducer has no moving parts, reducing wear and tear.

Environmental limits include operating temperatures from -40°C to +85°C and storage from -40°C to +100°C. It can withstand 100% condensing humidity (non-submerged) and magnetic fields up to <0.0068 mm/s/gauss @ 50 gauss, 50-60 Hz. These rugged specifications make it suitable for outdoor and washdown applications.

Common Questions About the 190501-08-99-04

Q: What is the sensitivity of the 190501-08-99-04?

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

Q: Can the 190501-08-99-04 be used in hazardous areas?

A: Yes, it has agency approvals including CSA/NRTL/C (Class I, Division 1) and ATEX/IECEx/CSA (Class I, Zone 0/1), with intrinsic safety ratings Ex ia IIC T4.

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

A: The maximum cable length is 305 meters (1,000 ft.) using 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: What mounting options are available?

A: The 190501-08-99-04 includes a plate stud 3/8-in 24 to 1/2-in 20, and it can be mounted in any orientation.

Product Support and Availability

The 190501-08-99-04 is available through Petro Auto Tech, a trusted industrial automation parts supplier. For current lifecycle status and availability, contact Petro Auto Tech before ordering. Our team can assist with technical questions and ensure you receive the correct part for your application.