Specialized Velocity Sensing for Slow-Speed Rotating Equipment
The 190501-12-00-02 Velomitor CT Velocity Transducer is a low-frequency version of the standard Velomitor velocity sensor family. It is specifically optimized for monitoring casing vibration velocity on cooling tower and air-cooled heat exchanger fan assemblies operating at approximately 90 rpm and above, with many applications typically falling in the 100 to 300 rpm range.
Unlike displacement-based proximity systems, this sensor measures casing vibration directly and provides a velocity output signal proportional to machine vibration. Its design allows maintenance teams to monitor fan systems, motors, and gear reducers where early vibration detection is critical for reliability and operational efficiency.
The 12-00-02 configuration includes a 3/8-24 to M8×1 mounting stud option, MIL-C-5015 connector interface, and hazardous-area approval option for industrial installations requiring additional certification.
Technical Specifications
| Parameter | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 190501-12-00-02 |
| Product Type | Velomitor CT Velocity Transducer |
| Sensor Technology | Piezoelectric Velocity Sensing |
| Measurement Type | Casing vibration velocity |
| Primary Application | Cooling tower and air-cooled heat exchanger fan monitoring |
| Frequency Response | 3 Hz to 900 Hz (±1 dB); 1.5 Hz to 1 kHz (±3 dB) |
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Velocity Range | Up to 63.5 mm/s peak (2.5 in/s peak) |
| Mounting Hardware | Plate stud 3/8-24 to M8×1 |
| Connection Interface | MIL-C-5015 connector |
| Connector Type | 2-pin 316L stainless steel MIL-C-5015 top connector |
| Case Material | 316L stainless steel |
| Mounting Surface Diameter | 33 mm (1.3 in) |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +100°C |
| Mounting Torque | 4.5 N·m ±0.6 N·m |
| Dimensions | Approx. 82 × 33 mm |
| Weight | Approx. 0.297 kg |
Industrial Applications
Designed for Reliable Fan and Machinery Condition Monitoring
The 190501-12-00-02 Velomitor CT is optimized for applications where low-speed vibration measurement and continuous equipment monitoring are essential.
| Industry | Typical Equipment |
|---|
| Power Generation | Cooling tower fans, auxiliary fan systems |
| Petrochemical | Air-cooled heat exchangers |
| Oil & Gas | Process cooling equipment |
| Industrial Plants | Large ventilation and fan assemblies |
| Utilities | Cooling and heat rejection systems |
Typical monitoring applications include:
-
Cooling tower fan vibration monitoring
-
Fan motor condition monitoring
-
Gear reducer vibration analysis
-
Bearing housing vibration measurement
-
Mechanical imbalance detection
-
Misalignment identification
-
Predictive maintenance programs
The sensor is especially valuable for large fan assemblies where casing vibration trends provide important information about machine health.
Key Performance Advantages
Optimized for Low-Frequency Vibration
The Velomitor CT design extends velocity measurement capability into lower-frequency ranges, making it suitable for slow-speed rotating equipment where traditional sensors may not provide sufficient sensitivity.
Rugged Industrial Construction
The 316L stainless-steel housing provides excellent mechanical durability and corrosion resistance, supporting long-term operation in demanding plant environments.
Stable Velocity Output
The sensor provides a proportional velocity signal that can be easily integrated into machinery monitoring and protection systems, helping operators establish reliable vibration trends.
Hazardous Area Capability
The 190501 series supports hazardous-area certified configurations, making it suitable for industrial facilities with strict safety requirements.
Reduced Maintenance Risk
Continuous vibration monitoring helps maintenance teams identify developing mechanical problems before they result in unexpected equipment shutdowns.
Technical FAQs
Q1: What is the main function of the Bently Nevada 190501-12-00-02?
It measures casing vibration velocity on rotating machinery, especially low-speed cooling tower and fan assemblies.
Q2: What type of sensor technology does this model use?
The Velomitor CT uses piezoelectric velocity sensing technology.
Q3: What equipment is this sensor mainly designed for?
It is primarily designed for cooling tower fans and air-cooled heat exchanger fan systems.
Q4: Can this sensor measure low-speed machinery vibration?
Yes. It is optimized for equipment operating around 90 rpm and above, including many applications in the 100–300 rpm range.
Q5: What is the output sensitivity of the 190501-12-00-02?
The sensitivity is approximately 3.94 mV/mm/s (100 mV/in/s) ±5%.
Q6: What type of connector does this model use?
This configuration uses a 2-pin 316L stainless-steel MIL-C-5015 connector.
Q7: What mounting hardware is included with this model?
The -12 option provides a plate stud mounting configuration from 3/8-24 to M8×1.
Q8: Can the sensor be installed in hazardous areas?
Yes. The -02 approval option supports certified hazardous-area installation requirements.
Q9: What maintenance is recommended for this velocity transducer?
Regular checks should include mounting torque verification, cable inspection, connector condition, and vibration signal review.
Q10: How is this sensor different from a proximity probe?
A proximity probe measures shaft displacement directly, while the Velomitor CT measures casing vibration velocity from the machine housing.
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