190501-04-00-04 | Bently Nevada Velomitor CT Velocity Transducer

Introduction to the Bently Nevada 190501-04-00-04

When machine vibration threatens uptime, the 190501-04-00-04 from Bently Nevada provides accurate, continuous velocity measurement. This Velomitor CT velocity transducer is engineered for industrial rotating equipment, offering a direct output proportional to case velocity. With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%, it delivers precise data for condition monitoring and protection systems.

Built for harsh environments, the 190501-04-00-04 operates from -40°C to +85°C and survives shocks up to 5000 g pk. Its 316L stainless steel case and MIL-C-5015 connector ensure durability in demanding applications. This transducer is a cost-effective solution for reducing unplanned downtime and extending machinery life.

Key Features and Technical Specifications

The 190501-04-00-04 offers a robust set of specifications that support reliable vibration monitoring. Below are the core parameters from the datasheet:

• 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 metres (1,000 ft.) with no signal degradation.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Shock Limit: 5000 g pk, maximum.
• Humidity Limit: 100% condensing, non-submerged.

One standout feature is the mounted resonant frequency of 9 kHz minimum (stud mounted), which ensures accurate measurement across a wide frequency range. Additionally, the internal electronics are isolated from the case, reducing ground loop issues and improving signal integrity.

Applications and Use Cases

The 190501-04-00-04 is ideal for monitoring pumps, motors, fans, and other rotating machinery in industries such as oil and gas, power generation, and manufacturing. Its intrinsic safety approvals (Ex ia IIC T4, AEx ia IIC T4) make it suitable for hazardous areas, including Class I, Division 1 and Zone 0/1 environments. Consequently, it supports predictive maintenance programs that reduce downtime and maintenance costs.

Furthermore, the transducer's wide frequency response captures both low-speed and high-speed vibration events, enabling early detection of bearing wear, imbalance, and misalignment. This proactive approach helps avoid catastrophic failures and extends equipment life.

Installation and Setup

Proper installation is critical for accurate vibration measurement. The 190501-04-00-04 features a stud M6x1 mounting with a 3/8-in-24 adapter, allowing secure attachment to the machine surface. The recommended mounting torque is 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf). Ensure the mounting surface is flat and clean to achieve optimal frequency response.

The transducer uses a MIL-C-5015 connection interface, which provides a reliable, weatherproof connection. The cable can extend up to 305 metres without signal degradation, offering flexibility in routing to monitoring systems. For hazardous area installations, follow the specific wiring instructions in drawing 167536.

Maintenance and Reliability

Routine inspection of the 190501-04-00-04 ensures long-term reliability. Periodically check the mounting integrity and connector condition, as vibration and environmental stress can loosen fittings. The 316L stainless steel case resists corrosion, making it suitable for humid or chemical-laden environments.

Because the transducer has no moving parts, it requires minimal maintenance beyond visual checks. Its robust design, combined with a broad operating temperature range, ensures consistent performance over years of service. This reliability translates into lower total cost of ownership, as fewer replacements and less downtime are needed.

Compatibility and Integration

The 190501-04-00-04 is designed to integrate seamlessly with Bently Nevada monitoring systems and other data acquisition equipment that accept velocity transducer inputs. Its output bias voltage of 10.1 Vdc and dynamic impedance of less than 400 Ω make it compatible with standard signal conditioning modules.

For new installations, verify that the monitoring system supports the transducer's sensitivity and frequency response. The maximum cable length of 305 metres allows placement of the monitor in a safe area while the sensor remains in the hazardous zone.

Common Questions About the 190501-04-00-04

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

A: The sensitivity is 3.94 mV/mm/s (100 mV/in/s) ±5%.

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

A: Yes, it has ATEX/IECEx/CSA approvals for Class I, Division 1 and Zone 0/1, with Ex ia IIC T4 rating.

Q: What is the maximum cable length for the 190501-04-00-04?

A: The maximum cable length is 305 metres (1,000 ft.) with no signal degradation.

Q: What is the operating temperature range?

A: The transducer operates from -40°C to +85°C (-40°F to +185°F).

Q: How is the 190501-04-00-04 mounted?

A: It uses a stud M6x1 with a 3/8-in-24 adapter, with a recommended mounting torque of 4.5 N-m ± 0.6 N-m.

Product Support and Availability

The 190501-04-00-04 is available from Petro Auto Tech. Contact our team for current pricing and lead times. We are ready to assist with your vibration monitoring needs.