190501-01-99-CN | Bently Nevada 3.94 mV/mm/s Velocity Transducer

Introduction to the 190501-01-99-CN

When machinery vibration threatens uptime, the 190501-01-99-CN from Bently Nevada provides precise, dependable measurement. 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 (100 mV/in/s) and a frequency response from 3.0 Hz to 900 Hz, it captures critical vibration data to help you detect issues early.

As a maintenance engineer, you need sensors that perform consistently under harsh conditions. The 190501-01-99-CN is built with a 316L stainless steel case and offers a broad operating temperature range of -40°C to +85°C. Its robust design ensures long-term reliability, reducing the frequency of replacements and lowering your total cost of ownership.

Key Features & Technical Specifications

The 190501-01-99-CN is packed with features that support accurate vibration monitoring. Below 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
• Temperature Sensitivity: -8% to +5% typical over operating range
• 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)
• 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)
• Storage Temperature: -40°C to +100°C (-40°F to +212°F)
• Shock Limit: 5000 g pk, maximum
• Humidity Limit: 100% condensing, non-submerged
• Magnetic Field Susceptibility: <0.0068 mm/s/gauss (0.268 mil/s/gauss) @ 50 gauss, 50-60Hz
• Weight: <297 g (10.5 oz.), typical
• Mounting Surface: 33 mm diameter (1.3 in diameter)
• Height: 82 mm (3.2 in)
• Case Material: 316L stainless steel
• Connector: 2-pin 316L stainless steel MIL-C5015, top
• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in–lbf ± 5 in-lbf)

One standout feature is the internal electronics isolated from the case, which minimizes ground loop issues and enhances signal integrity. This isolation is critical in industrial settings where electrical noise can corrupt vibration data.

Real-World Applications

The 190501-01-99-CN is ideal for monitoring rotating machinery such as pumps, motors, fans, and compressors. Its wide frequency response and high shock tolerance make it suitable for both normal and demanding environments. For example, in a petrochemical plant, this transducer can be mounted on a critical pump to provide early warning of bearing wear, allowing you to schedule maintenance before a costly failure occurs.

Moreover, the transducer's ability to operate in condensing humidity (100% condensing, non-submerged) ensures reliable performance in humid or wash-down areas. This versatility reduces the need for multiple sensor types, simplifying your spare parts inventory and lowering overall costs.

Installation & Setup

Proper installation is key to accurate vibration measurement. The 190501-01-99-CN comes with a stud 3/8-in 24 to 3/8-in 24 mounting hardware option, ensuring a secure and stable mount. The unit includes a 32-foot cable, which simplifies wiring in many setups.

When mounting, apply the recommended torque of 4.5 N-m ± 0.6 N-m to avoid over-tightening, which could affect readings. The transducer can be mounted in any orientation, giving you flexibility in tight spaces. Additionally, the polarity is defined: Pin A goes positive with respect to Pin B when velocity is from base to top, so ensure correct wiring to maintain proper phase.

For extended cable runs, the maximum cable length of 305 metres (using part number 02173006) allows remote mounting without signal degradation, reducing the need for nearby junction boxes.

Maintenance & Reliability

Routine inspection is essential to ensure long-term accuracy. Periodically check the mounting integrity and cable condition, especially in high-vibration environments. The 316L stainless steel construction resists corrosion, but it's wise to verify that the connector remains clean and dry.

Given the transducer's robust design, you can expect minimal maintenance. The internal electronics are sealed and isolated, reducing the risk of contamination. By following a simple inspection schedule, you can extend the service life and maintain measurement confidence.

Compatibility & Integration

The 190501-01-99-CN is a Bently Nevada product, designed to integrate seamlessly with Bently Nevada monitoring systems. Its standard output (3.94 mV/mm/s) is compatible with most vibration monitoring equipment that accepts velocity transducer inputs. The included 32-foot cable and MIL-C5015 connector facilitate straightforward connection to your existing system.

For new installations, verify that your monitor's input impedance and bias voltage requirements match the transducer's output characteristics. The low output impedance (<400 Ω) ensures minimal signal loss over long cable runs.

Troubleshooting & Common Issues

If you encounter erratic readings, first check the mounting torque and ensure the stud is tight. Loose mounting can introduce resonance and distort the vibration signal. Also, inspect the cable for damage, as a broken shield can cause noise.

Another common issue is incorrect polarity. Confirm that Pin A is connected to the positive input of your monitor. If readings appear inverted, swap the connections. Finally, verify that the transducer is not exposed to temperatures beyond its rated range, as extreme heat or cold can affect sensitivity.

FAQ about 190501-01-99-CN

Q: What is the sensitivity of the 190501-01-99-CN?

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

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

A: The maximum cable length is 305 metres (1,000 ft.) using cable part number 02173006, with no signal degradation.

Q: Can the 190501-01-99-CN be used in hazardous areas?

A: Yes, it has intrinsic safety approvals (Ex ia IIC T4, AEx ia IIC T4) for Class I, Div 1, Groups A, B, C, D; Class II, Groups E, F, G; Class III. Install per drawing 167536.

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 should I mount the transducer?

A: Use the provided stud (3/8-in 24) and tighten to 4.5 N-m ± 0.6 N-m. The transducer can be mounted in any orientation.

Product Support & Availability

The 190501-01-99-CN is available through Petro Auto Tech, your trusted industrial automation parts supplier. We stock this model and can ship promptly to minimize your downtime. For technical assistance or to verify compatibility with your system, contact our team—we're here to help.