Bently Nevada 190501-02-00-05 Velocity Transducer – Velomitor CT

Bently Nevada 190501-02-00-05 Velomitor CT — Casing Velocity Transducer for Continuous Machinery Protection

The Bently Nevada 190501-02-00-05 is a piezoelectric, IEPE-powered casing velocity transducer belonging to the Velomitor CT (Compact Transducer) product family. It is designed for permanent installation on bearing housings, gearbox casings, pump frames, and motor end-bells where continuous vibration surveillance is required as part of an API 670-compliant machinery protection system. Unlike eddy-current proximity probes — which measure shaft relative motion — the Velomitor CT measures absolute casing velocity, making it the correct sensor choice for machines with fluid-film bearings where both shaft and casing motion must be independently characterized.

The -02 option designates the standard cable exit configuration, while the -05 suffix specifies a 2-pin MIL-C-5015 circular connector, a military-specification termination that provides superior vibration resistance and environmental sealing compared to BNC or M12 alternatives. This connector variant is the preferred choice for offshore platforms, heavy industrial skids, and any installation subject to mechanical shock or continuous vibration at the cable junction.

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Technical Parameters

Hardware Logical Analysis

The 190501-02-00-05 integrates a shear-mode piezoelectric crystal stack with a seismic mass assembly housed within a 316L stainless steel body. The shear-mode configuration is mechanically superior to compression-mode designs: it exhibits lower sensitivity to base strain and thermal transients, which are common error sources in machinery installations where the sensor mounting surface undergoes thermal cycling during start-up and shutdown sequences.

The internal IEPE signal conditioning circuit converts the high-impedance charge output of the piezoelectric element into a low-impedance voltage signal suitable for transmission over standard coaxial cable runs up to 300 m without signal degradation. The constant-current excitation model (2–20 mA) eliminates the need for an external charge amplifier or signal conditioner, reducing the total component count in the monitoring loop and removing a potential failure point from the signal chain.

EMC performance is addressed through the MIL-C-5015 connector’s integral metal shell, which provides 360° circumferential shielding continuity at the cable junction — a design detail that prevents ground loops and common-mode noise injection at the most mechanically stressed point of the cable assembly. The 316L SS housing acts as a Faraday shield for the internal electronics, attenuating radiated electromagnetic interference from adjacent variable-frequency drives (VFDs), motor starters, and high-current bus bars that are common in turbine hall and compressor station environments.

The compact CT body geometry — approximately 40% smaller in envelope than the original Velomitor 190501-01 series — was achieved by integrating the IEPE conditioning circuit directly onto the piezoelectric element substrate rather than mounting it on a separate PCB. This integration reduces internal parasitic capacitance, extends the usable high-frequency response, and improves thermal stability of the sensitivity coefficient across the rated temperature range.

System Integration Benefits

• Direct 3500 rack compatibility: The 190501-02-00-05 interfaces natively with the Bently Nevada 3500/22M Transient Data Interface and 3500/42M Proximitor/Velomitor monitor cards without any intermediate signal conditioning hardware, preserving the deterministic scan cycle of the 3500 protection system.
• Backward-compatible form factor: The CT series maintains the same 1/4-28 UNF mounting footprint and MIL-C-5015 connector pinout as the legacy 190501-01 Velomitor, enabling direct field replacement without re-drilling mounting pads or re-terminating cable assemblies.
• Reduced wiring infrastructure: IEPE architecture requires only a single coaxial cable per channel versus the two-conductor shielded cable required by charge-mode sensors, cutting cable tray fill and termination labor on multi-channel installations.
• Deterministic alarm response: The low-impedance IEPE output maintains signal integrity across the full 300 m cable run, ensuring that the 3500 monitor card receives an undistorted waveform for both overall level alarming and waveform-based diagnostics without latency introduced by signal conditioning delays.
• Diagnostic transparency: The DC bias voltage present on the IEPE output (8–12 VDC) serves as a continuous health indicator; a bias voltage outside this window indicates an open circuit, short circuit, or sensor failure, enabling the 3500 system to generate a sensor fault alarm without requiring a separate continuity check circuit.
• Wide thermal operating envelope: The −40 °C to +121 °C rating covers arctic upstream compression stations and high-ambient turbine hall installations within a single part number, eliminating the need to stock temperature-specific sensor variants.
• IP67 environmental sealing: Full dust exclusion and 30-minute submersion resistance at 1 m depth allows installation in below-grade pump pits, outdoor compressor skids, and wash-down zones without additional protective enclosures.
• API 670 compliance pathway: The sensor’s frequency response, sensitivity, and environmental ratings satisfy the casing vibration transducer requirements defined in API Standard 670 (5th Edition), supporting machinery protection system certification for critical rotating equipment in refinery and gas processing applications.

Quality Assurance & Global Logistics

Every Bently Nevada 190501-02-00-05 unit supplied by siemensplc.com is sourced through verified industrial automation supply channels and subjected to a structured incoming inspection protocol before dispatch. Each unit undergoes visual verification against OEM dimensional drawings, sensitivity confirmation using a calibrated reference shaker traceable to national metrology standards, connector integrity and IP sealing verification, and original manufacturer labeling and date code authentication. Units are packed in anti-static foam-lined cartons with humidity indicator cards to maintain electrostatic and moisture protection throughout transit.

Shipments originate from our warehouse in Xiamen, China, with access to DHL Express, FedEx International Priority, and UPS Worldwide Expedited services. Standard in-stock orders are dispatched within 1–3 business days. Full export documentation — commercial invoice, packing list, certificate of origin, and HS code classification — is prepared for every international shipment to facilitate customs clearance in the destination country. A certificate of conformance (CoC) is available upon request for critical machinery protection applications requiring documented traceability.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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