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

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

When rotating machinery vibration threatens uptime, the 190501-08-99-04 from Bently Nevada provides a dependable measurement solution. 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 delivers consistent data for condition monitoring and predictive maintenance programs.

Part of the trusted Velomitor CT series, this model includes a 32-foot cable and a plate stud mounting option (3/8-in 24 to 1/2-in 20). Its 316L stainless steel case and MIL-C5015 connector ensure robust performance in demanding settings. Whether you are upgrading an existing system or specifying new equipment, the 190501-08-99-04 offers a reliable path to vibration insight.

Key Features and Technical Specifications

The 190501-08-99-04 is built to deliver precise velocity measurements across a wide operating range. 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
• Base Strain Sensitivity: 0.43 mm/s/μstrain
• Mounted Resonant Frequency: 9 kHz minimum (stud mounted)
• Amplitude Linearity: ±2% to 63.5 mm/s pk
• Temperature Sensitivity: -8% to +5% typical over operating range

These specifications make the 190501-08-99-04 suitable for applications that require stable, repeatable vibration data. The internal electronics are isolated from the case, reducing ground loop issues and improving signal integrity.

Buyer's Guide: Evaluating the 190501-08-99-04 for Your Application

When selecting a velocity transducer, consider the environmental limits and mounting requirements. The 190501-08-99-04 operates from -40°C to +85°C and can be stored from -40°C to +100°C. It withstands up to 5000 g pk shock and 100% condensing humidity (non-submerged). These ratings make it a strong candidate for harsh industrial settings.

Mounting flexibility is another advantage. The plate stud option (3/8-in 24 to 1/2-in 20) allows secure attachment to various machine surfaces. The recommended mounting torque is 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf), ensuring proper coupling for accurate readings. The transducer can be mounted in any orientation, simplifying installation in tight spaces.

For long cable runs, the 190501-08-99-04 supports up to 305 meters (1,000 ft) of cable (part number 02173006) without signal degradation. This is particularly useful when the monitoring system is located far from the machine. The included 32-foot cable covers most immediate needs, but longer runs are possible with the specified cable type.

Installation and Setup Tips

Proper installation is critical for achieving accurate vibration data. Begin by preparing the mounting surface to be flat and clean. Apply the recommended mounting torque to avoid over-stressing the transducer. Ensure the cable is routed away from moving parts and heat sources to prevent damage.

For the 190501-08-99-04, polarity is defined: Pin A goes positive with respect to Pin B when velocity is from base to top. This orientation should be noted during wiring to ensure correct phase interpretation. If you are replacing an existing transducer, verify that the mounting thread matches the plate stud option to avoid compatibility issues.

Maintenance and Reliability

Routine inspection of the transducer and its cable helps maintain long-term reliability. Check for signs of wear, such as cable abrasion or connector corrosion, especially in humid or corrosive environments. The 316L stainless steel case offers excellent resistance, but periodic visual checks are still recommended.

Because the 190501-08-99-04 has no moving parts, it requires minimal maintenance compared to other sensor types. Its robust design reduces the likelihood of failure, contributing to lower total cost of ownership. For critical machinery, consider implementing a regular calibration schedule to ensure measurement accuracy remains within specifications.

Compatibility and Integration

The 190501-08-99-04 is designed to work with Bently Nevada monitoring systems, but its standard analog output (velocity signal) allows integration with many data acquisition platforms. The output bias voltage of 10.1 Vdc provides a stable reference for signal conditioning. The low output impedance (<400 Ω) ensures compatibility with most input modules.

For hazardous area installations, the agency approval option 04 includes CSA/NRTL/C (Class I, Division 1) and ATEX/IECEx/CSA (Class I, Zone 0/1) certifications. This makes the transducer suitable for use in explosive atmospheres when installed per drawing 167536. Always verify that your system's barriers and wiring meet the intrinsic safety requirements.

Frequently Asked Questions

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

A: The transducer has a frequency response of 3.0 Hz to 900 Hz (±1.0 dB) and 1.5 Hz to 1.0 kHz (±3.0 dB).

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

A: Yes, with agency approval option 04, it is certified for Class I, Division 1 and Zone 0/1 environments.

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

A: The maximum cable length is 305 meters (1,000 ft) when using cable part number 02173006.

Q: What is the operating temperature range?

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

Q: How is the transducer mounted?

A: It uses a plate stud (3/8-in 24 to 1/2-in 20) and 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 pricing and lead times, contact Petro Auto Tech directly. Please verify the latest product lifecycle status before ordering, as availability may vary.