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Product Introduction
The Bently Nevada 190501-01-00-00 Velomitor CT is a compact, industrial-grade seismic velocity transducer designed for accurate measurement of casing vibration in rotating and reciprocating equipment. As part of the renowned Velomitor® CT Series, this sensor incorporates a piezoelectric sensing element with built-in signal conditioning to produce a directly usable output signal proportional to velocity.
Unlike traditional velocity transducers that rely on moving coil mechanisms, the Velomitor CT uses solid-state technology, resulting in greater reliability, better frequency response, and higher resistance to environmental challenges such as shock, vibration, and moisture. It is engineered for continuous condition monitoring and machinery protection in harsh environments, making it a reliable choice for asset management systems in power, oil and gas, pulp & paper, and general industrial sectors.
Product Specifications
| Parameter | Specification |
| Model Number | 190501-01-00-00 |
| Product Type | Piezoelectric Velocity Transducer |
| Output Signal | 4.0 mV/mm/s (±5%), differential |
| Measurement Range | ±127 mm/s (±5 in/s) peak velocity |
| Frequency Response | 4.5 Hz to 5,000 Hz (±3 dB) |
| Sensitivity | 4.0 mV/mm/s ±5% at 100 Hz, 25°C |
| Transverse Sensitivity | <5% of axial sensitivity |
| Operating Temperature Range | –54°C to +121°C (–65°F to +250°F) |
| Environmental Sealing | Hermetically sealed (welded stainless steel housing) |
| Electrical Isolation | Isolated from casing >10⁶ ohms at 500 Vdc |
| Output Bias Voltage | –9 to –11 VDC |
| Power Requirements | Powered by Bently Nevada monitor or signal conditioner |
| Connector Type | MIL-C-5015, 2-pin |
| Mounting Type | 1/4-28 UNF tapped hole or adapter stud |
| Case Material | 316L Stainless Steel |
| Diameter | 33 mm |
| Weight | 0.297 kg |
| Compliance | CE, RoHS, CSA/ATEX (hazardous area optional variants) |
Product Applications
The 190501 Velomitor CT transducer is purpose-built for industrial and plant machinery requiring accurate casing vibration monitoring. Specific application areas include:
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Electric Motors & Pumps: Monitoring for mechanical faults such as imbalance and misalignment.
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Centrifugal Compressors: Detection of mechanical looseness, bearing degradation, and casing resonance.
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Fans & Blowers: Early detection of unbalance, bearing issues, and structural resonance.
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Gearboxes: Detecting gear mesh faults and vibrational irregularities.
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Paper Machine Rolls: Effective in vibration trend analysis for early intervention.
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General Industrial Equipment: Any rotating or reciprocating machinery with casing vibration concerns.
It is typically used in systems where direct casing velocity measurements are integrated into centralized machinery protection and monitoring systems like the Bently Nevada 3500 or 1900 series monitors.
Product Advantages
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Solid-State Reliability: No moving parts, providing superior long-term durability and shock resistance.
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High Accuracy: Tight sensitivity tolerance ensures precise vibration monitoring.
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Compact & Robust: Small form factor fits into tight installation areas while withstanding harsh conditions.
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Excellent Frequency Response: Wide frequency bandwidth supports reliable detection of machinery faults.
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Hermetically Sealed: Designed to resist moisture, dust, and oil ingress, ensuring stable operation over time.
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Isolated Housing: Electrical isolation eliminates ground loop issues, improving data integrity.
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Standard Output Signal: Compatible with Bently Nevada systems and third-party condition monitoring tools.
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Fast Installation: Easy to mount with standard threads or optional mounting adapters.
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Certified Options: Available for hazardous area installations with ATEX/CSA compliance.
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Brand Assurance: Supported by decades of Bently Nevada expertise in vibration monitoring.
FAQ (Frequently Asked Questions)
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What is the output type of the Velomitor CT 190501?
It provides a differential output signal of 4.0 mV/mm/s. -
Can this sensor be used in high-temperature areas?
Yes, it operates reliably up to +121°C (250°F). -
Is it compatible with the Bently Nevada 3500 monitoring system?
Absolutely. It integrates directly with 3500 series and 1900 series monitors. -
What mounting options are available?
Standard 1/4-28 UNF tapped hole or optional mounting studs can be used. -
Is it resistant to harsh industrial environments?
Yes, the sensor is hermetically sealed in stainless steel and shock-resistant. -
Does it require external power?
No, it is powered by the connected Bently Nevada monitor or signal conditioner. -
Is this a velocity or acceleration transducer?
It is a velocity transducer using piezoelectric technology. -
What is the weight of this sensor?
The sensor weighs 0.297 kg. -
Can it be used in hazardous (explosive) areas?
Yes, with certain variants certified for ATEX and CSA environments. -
What is the typical cable connection for this sensor?
It uses a MIL-C-5015 2-pin connector for rugged industrial connections.
Recommended Models – Same Series or Related
| Model Number | Description | Output Type | Mounting | Dimensions (mm) |
| 190501-01-00-00 | Standard Velomitor CT | 4.0 mV/mm/s | 1/4-28 UNF | 64 × 24 |
| 190501-02-00-00 | Velomitor CT with integral cable | 4.0 mV/mm/s | Direct mount | 64 × 24 |
| 190501-03-00-00 | Hazardous area rated version | 4.0 mV/mm/s | ATEX-certified | 64 × 24 |
| 330500-02-00 | Velomitor Piezo-velocity Sensor | 3.94 mV/mm/s | 1/4-28 UNF | 62 × 25 |
| 330525-02-12-01-05 | Low-frequency velocity sensor | 4.0 mV/mm/s | Magnetic or stud mount | 63 × 26 |
| 330750-90-05 | Accelerometer with velocity output | Dual-mode | Adhesive or stud mount | 60 × 23 |
Popular Models from Bently Nevada
| Model Number | Description | Application | Channels | Dimensions (mm) |
| 3500/42M | Proximitor Monitor Module | Shaft Vibration | 4 | 241 × 24 × 241 |
| 3500/22M | Transient Data Interface Module | Communication | N/A | 241 × 24 × 241 |
| 3500/40M | Velocity Monitor Module | Seismic Monitoring | 4 | 241 × 24 × 241 |
| 3500/50 | Tachometer Module | Speed Measurement | 2 | 241 × 24 × 241 |
| 3701/55 | Vibration Monitor – ADAPT Series | Standalone Monitoring | 4 | 176 × 48 × 143 |
| 1900/65A | General Purpose Equipment Monitor | Local Monitoring | 2 | 127 × 43 × 130 |
