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

Introduction to the 190501-08-99-04

When unplanned downtime threatens production, the 190501-08-99-04 from Bently Nevada provides the precise vibration data needed to act early. This Velomitor CT velocity transducer is engineered for continuous machinery protection in demanding environments. Its robust design and consistent performance help you avoid costly failures and extend equipment life.

Key Features & Technical Specifications

The 190501-08-99-04 stands out for its high sensitivity and wide frequency range. Here are the core specifications you can rely on:

• 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).
• Mounted Resonant Frequency: 9 kHz minimum (stud mounted, except quick disconnect).
• 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 includes a 32-foot cable (connection option 99) and a plate stud mounting option (08). Its internal electronics are isolated from the case, reducing ground loop issues.

Cost-Benefit & ROI Analysis

Investing in the 190501-08-99-04 delivers measurable returns. Its high sensitivity and linearity (±2% to 63.5 mm/s pk) ensure accurate detection of developing faults, allowing maintenance teams to schedule repairs during planned outages. This reduces emergency callouts and production losses. The rugged 316L stainless steel case and wide temperature range minimize replacement frequency, lowering total cost of ownership. With a maximum cable length of 305 meters (1,000 ft.), you can place the transducer far from the monitoring system, saving on cable and installation costs.

Applications & Use Cases

The 190501-08-99-04 is ideal for rotating machinery such as pumps, fans, compressors, and motors. It is particularly effective in harsh environments where moisture, shock, or temperature extremes are present. For example, in a petrochemical plant, this transducer can monitor a critical pump's vibration, providing early warning of bearing wear. This allows you to replace the bearing during a scheduled shutdown rather than facing an unplanned failure. The transducer's intrinsically safe approvals (Ex ia IIC T4, AEx ia IIC T4) make it suitable for hazardous areas, reducing the need for additional safety barriers.

Installation & Mounting

Proper installation is essential for accurate readings. The 190501-08-99-04 comes with a plate stud mounting option (3/8-in 24 to 1/2-in 20). Apply the recommended mounting torque of 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf). The transducer can be mounted in any orientation, simplifying placement. Ensure the mounting surface is clean and flat to achieve the specified resonant frequency. The included 32-foot cable (part number 02173006) can be extended up to 305 meters without signal degradation, giving you flexibility in system layout.

Maintenance & Reliability

Routine maintenance of the 190501-08-99-04 is minimal. Because it has no moving parts, the primary wear point is the cable. Inspect the cable periodically for cuts or abrasion, especially in high-traffic areas. The 316L stainless steel case resists corrosion, even in condensing humidity (100% condensing, non-submerged). The transducer's magnetic field susceptibility is low (<0.0068 mm/s/gauss), so it can be mounted near motors and transformers without significant interference. Regular verification of output bias voltage (10.1 Vdc ± 1.0 Vdc) can confirm the transducer is functioning correctly.

Compatibility & Integration

The 190501-08-99-04 is a passive velocity transducer that outputs a voltage proportional to vibration velocity. It is compatible with most Bently Nevada monitoring systems and can be integrated into existing vibration monitoring networks. The 2-pin MIL-C-5015 connector ensures a secure, standard connection. For hazardous area installations, follow the installation drawing 167536 to maintain intrinsic safety (T4 @ -40°C ≤ Ta ≤ +100°C).

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

A: Yes, it has intrinsic safety approvals including Ex ia IIC T4 and AEx ia IIC T4, suitable for Class I, Division 1, Groups A, B, C, D.

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

A: You can use up to 305 meters (1,000 ft.) of cable (part number 02173006) without 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 mounting option (3/8-in 24 to 1/2-in 20).

Product Support & Availability

The 190501-08-99-04 is available through Petro Auto Tech. Contact our team to confirm stock and lead times. We provide fast, reliable service to keep your operations running.