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

Why Choose the Bently Nevada 190501-08-99-04 Velomitor CT?

When rotating machinery fails unexpectedly, unplanned downtime can cost thousands per hour. The 190501-08-99-04 from Bently Nevada helps you avoid that risk by providing accurate, continuous velocity measurements. This Velomitor CT velocity transducer is engineered for industrial environments where reliability is non-negotiable.

With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, the 190501-08-99-04 delivers precise vibration data. Its frequency response spans 3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB, and extends to 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB. This broad range captures both slow-speed and high-speed machinery vibrations.

Key Features & Technical Specifications

• 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)
• 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)
• Maximum Cable Length: 305 meters (1,000 ft) with part number 02173006

The 190501-08-99-04 also features internal electronics isolated from the case, reducing ground loop issues. Its 316L stainless steel case and connector ensure durability in harsh environments.

Built for Hazardous Areas

The 190501-08-99-04 carries agency approvals for use in explosive atmospheres. It is certified as intrinsically safe Ex ia IIC T4 and AEx ia IIC T4 for Class I, Division 1, Groups A, B, C, D; Class II, Groups E, F, G; and Class III. It also meets non-incendive standards Ex nL IIC T4 and AEx nA T4 for Class I, Division 2, Groups A, B, C, D. Installation must follow drawing 167536, with temperature rating T4 @ -40°C ≤ Ta ≤ +100°C.

Installation & Mounting

The 190501-08-99-04 includes a plate stud mounting option (3/8-in 24 to 1/2-in 20) and comes with a 32-foot cable. Mounting torque is 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf). The transducer can be mounted at any angle, offering flexibility for tight spaces. Its mounting surface diameter is 33 mm (1.3 in), and height is 82 mm (3.2 in).

For best results, follow the manufacturer's installation manual. Ensure the mounting surface is clean and flat to achieve accurate readings.

Reliability & Maintenance

The 190501-08-99-04 is designed for long service life. Its 316L stainless steel construction resists corrosion, and the internal electronics are sealed against moisture. The unit operates from -40°C to +85°C and can be stored from -40°C to +100°C. It withstands shock up to 5000 g pk and 100% condensing humidity (non-submerged).

Routine inspection is recommended to verify mounting integrity and cable condition. No special cleaning is required—simply follow standard industrial practices.

Applications & Use Cases

This velocity transducer is ideal for monitoring pumps, motors, fans, compressors, and other rotating equipment. Its hazardous-area approvals make it suitable for oil & gas, chemical, and pharmaceutical plants. In these settings, the 190501-08-99-04 provides early warning of bearing wear, imbalance, or misalignment, helping you schedule maintenance before failure occurs.

Frequently Asked Questions

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%.

Q: What is the maximum cable length?

A: Up to 305 meters (1,000 ft) using cable part number 02173006 without signal degradation.

Q: Is the 190501-08-99-04 suitable for hazardous areas?

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

Q: What is the operating temperature range?

A: -40°C to +85°C (-40°F to +185°F).

Q: Can it be mounted in any orientation?

A: Yes, the mounting angle is any orientation.

Availability & Support

The Bently Nevada 190501-08-99-04 is available from Petro Auto Tech. Contact our team for current pricing and lead times. We are your trusted partner for industrial automation parts.