Bently Nevada 190501-00-00-CN Velomitor CT Upgrade

Product Overview

Bently Nevada 190501-00-00-CN Velomitor CT Replacement & Upgrade Solution for 3500/3300 Series

When your existing condition monitoring infrastructure relies on legacy Bently Nevada vibration sensing hardware, transitioning to a verified replacement without disrupting your machinery protection system is the top priority. The Bently Nevada 190501-00-00-CN Velomitor CT Seismic Velocity Transducer is a precision-engineered, broadband velocity sensor designed for smooth, low-risk migration from older Velomitor and proximity probe-based monitoring setups to a fully compatible, modern sensing solution — all without requiring changes to your existing wiring harness, conduit routing, or monitor rack configuration.

This unit is purpose-built for integration with Bently Nevada’s 3500 Series Machinery Protection System and is backward-compatible with legacy 3300 Series monitor racks. Whether you are replacing a failed sensor on a critical rotating machine, upgrading from an obsolete Velomitor SP (330500 series) to the CT variant, or standardizing your plant’s vibration monitoring inventory, the 190501-00-00-CN delivers the electrical and mechanical compatibility your maintenance team needs to complete the swap during a planned or emergency shutdown window.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from a legacy vibration monitoring setup to the 190501-00-00-CN Velomitor CT rarely involves the sensor alone. In practice, field engineers working on 3500 Series rack upgrades typically address several interconnected components during the same maintenance window to avoid repeat shutdowns.

On the monitor side, the Bently Nevada 3500/42M Proximitor / Seismic Monitor is the most common rack card paired with this transducer. If your existing 3500/42 card is approaching end-of-life or showing calibration drift, replacing it alongside the 190501-00-00-CN ensures the entire sensing chain is refreshed simultaneously. Similarly, plants running older 3300/16 Dual Velocity Monitor modules can use this sensor as a direct field replacement without reprogramming the monitor’s trip setpoints, since the output scaling remains consistent.

For installations where the sensor cable run exceeds 30 meters or passes through high-EMI environments near variable frequency drives or motor control centers, upgrading to a shielded Bently Nevada 330130 Extension Cable (or equivalent armored interconnect cable) at the same time as the sensor swap eliminates a common source of signal noise that can trigger nuisance trips on the 3500/20 Rack Interface Module.

Plants integrating vibration data into a DCS or safety instrumented system via Modbus or FOUNDATION Fieldbus should also verify the configuration of their 3500/92 Communication Gateway Module after sensor replacement, as channel scaling parameters may need minor adjustment when moving from an electrodynamic SP-type sensor to the CT piezoelectric variant. The gateway’s tag database and the associated System 1 Evolution software configuration should be backed up before the swap and validated post-commissioning.

In control cabinets where multiple sensors feed a shared terminal block assembly, the Bently Nevada 3500/05 Power Supply Module should be inspected for output voltage stability, particularly in older racks where capacitor aging may cause marginal supply conditions that affect CT-type sensor performance. Pairing the sensor replacement with a power supply health check — or a proactive swap to a new 3500/05 — is a best practice recommended by most reliability engineers during planned outages.

Finally, for sites performing a broader machinery protection upgrade that includes proximity probes on the same shaft, the Bently Nevada 3300 XL 8mm Proximity Transducer System (190711 series) and its associated 3500/40M Proximitor Monitor are natural companion upgrades that can be sourced and commissioned in the same project scope, reducing total engineering and commissioning hours.

Retrofit Guidance FAQ

Q: Can I reuse my existing field wiring when replacing a 330500-series sensor with the 190501-00-00-CN?
A: Yes. The 190501-00-00-CN uses the same 2-pin MIL-C-5015 compatible connector and the same signal polarity convention as the legacy Velomitor SP. In most installations, the existing cable, conduit, and junction box terminations can be reused without modification. Verify cable insulation integrity and shield continuity before reconnecting.

Q: Do I need to change any parameters in the 3500 Series monitor after installing this sensor?
A: Typically no. The 190501-00-00-CN is calibrated to the same sensitivity standard (100 mV/in/s or 4 mV/mm/s depending on configuration) as the sensors it replaces. However, it is good practice to perform a functional verification of the monitor’s OK relay and alarm setpoints after any sensor replacement, and to document the as-found / as-left readings in your CMMS.

Q: Is this sensor compatible with FOUNDATION Fieldbus or PROFIBUS communication architectures?
A: The 190501-00-00-CN itself is an analog output device. Communication protocol compatibility is determined by the 3500 Series monitor card and gateway module (e.g., 3500/92) in your rack, not by the sensor. No changes to your fieldbus segment or device address configuration are required when replacing the sensor.

Q: What is the physical installation footprint, and will it fit in my existing sensor bracket or mounting pad?
A: The 190501-00-00-CN shares the same housing envelope and stud mount thread specification (1/4-28 UNF or M8 metric) as the legacy Velomitor SP variants. No bracket modification, machining, or adapter plate is required for standard installations. Confirm mounting pad flatness and thread condition before installation.

Q: How do I validate the sensor after installation before returning the machine to service?
A: Connect the sensor to the monitor and verify the OK LED status on the 3500/42M or equivalent card. Apply a known vibration reference (calibration shaker or bump test) and confirm the monitor’s displayed velocity reading is within ±5% of the expected value. Check that alarm and danger setpoints are active and that the System 1 or DCS historian is receiving valid data before releasing the machine.

Warranty Assurance

Every Bently Nevada 190501-00-00-CN unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes functional verification including output signal check, connector integrity inspection, and housing seal assessment. Units are packed in anti-static, shock-resistant packaging suitable for international air and sea freight.

If a unit exhibits any defect in materials or workmanship within the warranty period, TOPNLMS will provide a replacement unit or full refund — your choice — with no restocking fee. Our technical team is available to support installation questions, compatibility verification, and post-commissioning troubleshooting via email and phone. Typical response time for technical inquiries is within 1 business day.

For urgent plant shutdowns or emergency replacement requirements, expedited shipping from our Xiamen warehouse is available to most destinations in Asia, Europe, and the Americas. Stock availability is confirmed at time of order, and a certificate of conformance is available upon request for quality-critical procurement processes.

We understand that unplanned downtime in rotating machinery protection systems carries significant operational and safety consequences. Our procurement guarantee is simple: the right part, verified before it ships, backed by a warranty you can rely on.