Bently Nevada 190501-12-99-00 Velomitor CT Velocity Transducer

190501-12-99-00 Bently Nevada Velomitor CT Velocity Transducer

Product Introduction

The 190501-12-99-00 from Bently Nevada is a rugged velocity sensor. It is commonly called a Velomitor CT. This transducer measures absolute casing vibration on rotating machinery. You can use it on compressors, turbines, fans, and pumps. The sensor outputs a dynamic signal proportional to velocity. Additionally, it provides a bias voltage for continuity checking. Its stainless steel construction resists corrosion. Therefore, it suits harsh industrial environments.

This particular Bently Nevada Velomitor CT comes with a plate stud mount. The mounting option is 12, which includes a 3/8-24 to M8x1 stud. Connection option 99 gives you a 32-foot attached cable. No agency approvals are included with the 00 suffix. However, other approval options are available separately. The sensor works in any orientation. This makes installation flexible and easy.

Electrical Specifications

The 190501-12-99-00 delivers stable and repeatable measurements. Below are the key electrical parameters.

• 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 to Pin B)

• Dynamic Output Impedance: <400 Ω typical

• Broadband Noise: 0.229 mm/s (0.009 in/s) pk

• Amplitude Linearity: ±2% up to 63.5 mm/s pk (2.5 in/s pk)

• Transverse Response: Less than 5% of axial sensitivity

• Base Strain Sensitivity: 0.43 mm/s/μstrain (0.017 in/s/μstrain)

Furthermore, the internal electronics are isolated from the case. This prevents ground loops. The maximum cable length reaches 305 meters (1000 feet) without signal degradation. Use cable part number 02173006 for extensions.

Temperature and Environmental Limits

The Bently Nevada 190501-12-99-00 performs reliably in extreme conditions.

• Operating Temperature: -40°C to +85°C (-40°F to +185°F)

• Storage Temperature: -40°C to +100°C (-40°F to +212°F)

• Temperature Sensitivity: -8% to +5% typical over the range

• Shock Limit: 5000 g pk maximum

• Humidity Limit: 100% condensing (non-submerged)

• Magnetic Field Susceptibility: <0.0068 mm/s/gauss at 50 gauss, 50-60 Hz

Additionally, the mounted resonant frequency is 9 kHz minimum. This applies to stud-mounted configurations. The sensor withstands high shock events. Therefore, it is suitable for heavy machinery monitoring.

Mechanical Specifications

This Velomitor CT has a compact and rugged design.

• Weight: <297 g (10.5 oz) typical

• Case Material: 316L stainless steel

• Connector: 2-pin 316L stainless steel, MIL-C5015 type (top exit)

• Mounting Surface Diameter: 33 mm (1.3 in)

• Height: 82 mm (3.2 in)

• Mounting Torque: 4.5 N-m ± 0.6 N-m (40 in-lbf ± 5 in-lbf)

• Mounting Angle: Any orientation

• Polarity: Pin A goes positive with respect to Pin B when velocity is from base to top

The mounting hardware option 12 provides a plate stud. The thread is 3/8-24 converting to M8x1. Connection option 99 includes a 32-foot attached cable. This simplifies installation in remote locations.

Hazardous Area Approvals (General Information)

Although the 190501-12-99-00 has approval option 00 (no approvals), other versions exist. For reference, options 01 through 04 include:

• Intrinsically Safe: Ex ia IIC T4, Class I Div 1, Groups A, B, C, D

• Non-Incendive: Ex nL IIC T4, Class I Div 2, Groups A, B, C, D

Install per drawing 167536. The T4 rating applies from -40°C to +100°C. Always verify your specific model number before ordering.

Installation Guidelines

First, prepare the mounting surface. It must be flat and clean. The recommended surface diameter is at least 33 mm. Next, apply the mounting torque of 4.5 N-m. Do not overtighten. Then, connect the 2-pin MIL-style connector. Pin A is the signal positive. Pin B is the common or return. After that, route the 32-foot cable away from high-voltage sources. Use shielded cable for extensions if needed. Finally, verify the bias voltage. It should read approximately 10.1 Vdc between Pin A and Pin B.

Meanwhile, keep these points in mind.

• The sensor can be mounted in any angle.

• Avoid mounting on uneven or painted surfaces.

• Do not exceed the shock limit of 5000 g.

Packaging List

• 190501-12-99-00 Velomitor CT velocity transducer (one unit)

• Attached 32-foot cable (pre-installed, option 99)

• Plate stud 3/8-24 to M8x1 (option 12, pre-assembled)

Note: No certificates or warranty documents are included in the package.

Shipping Information

We ship worldwide using trusted carriers.

• FedEx (priority, 3–5 business days)

• UPS (economy, 5–7 business days)

• DHL (express, 2–4 business days)

Tracking numbers are provided within 24 hours after dispatch.

Frequently Asked Questions (FAQ)

1. What does the 190501-12-99-00 measure?
This Bently Nevada Velomitor CT measures absolute casing velocity. It is used for vibration monitoring on rotating machinery like turbines and compressors.

2. What is the sensitivity of this sensor?
The sensitivity is 100 mV/in/s (3.94 mV/mm/s) with a ±5% tolerance. This is standard for most vibration monitoring systems.

3. Does the 190501-12-99-00 include hazardous area approvals?
No. Option 00 means no agency approvals. However, other versions with intrinsic safety (options 01-04) are available.

4. Can I extend the 32-foot cable?
Yes. You can extend up to 305 meters (1000 feet) using Bently Nevada cable part number 02173006. Signal quality remains unchanged.

5. What is the bias voltage used for?
The 10.1 Vdc bias voltage allows continuity checking. It helps verify that the sensor and cable are properly connected before taking measurements.