Bently Nevada 190501 Velomitor CT Modules – 190501-04-00-CN

Technical Dossier

Product Details And Specifications

Bently Nevada 190501 Series Technical Notes

The Bently Nevada 190501 Velomitor CT (Compact Transducer) series is a family of piezo-velocity transducers engineered for continuous vibration monitoring in heavy industrial environments. Deployed across petrochemical refineries, nuclear power stations, offshore platforms, and rotating machinery installations worldwide, the 190501 series occupies a critical position in machinery protection systems integrated with Bently Nevada 3500 and System 1 platforms. Its compact, hermetically sealed design allows direct mounting on bearing housings, gearboxes, and motor end-bells where space constraints prohibit the use of larger proximity probe systems. The series outputs a velocity signal (mV/mm/s or mV/in/s) directly compatible with 3500/42M and 3500/45 monitor cards, eliminating the need for external signal conditioning in most installations.

The Evolution of 190501 Architecture

The 190501 Velomitor CT series was introduced by Bently Nevada (now a Baker Hughes company) as a direct successor to the earlier 330500 and 330525 velocity transducer families. The original 190501 design established the core piezo-velocity sensing element with an integrated signal conditioning ASIC, replacing the passive coil-and-magnet architecture of legacy seismic transducers. This transition eliminated the resonance frequency limitations inherent to electrodynamic designs and extended the usable frequency range to 2–1000 Hz (±3 dB), covering both low-speed machinery and high-frequency bearing defect signatures.

Subsequent revisions introduced the -CN (conduit, no connector) and -CC (conduit, with connector) cable termination variants, addressing installation requirements in hazardous area classifications (ATEX Zone 1, IECEx, FM Class I Div 1). The -04- designation in the part number encodes the cable length (4 meters), with -08- (8 m) and -16- (16 m) variants available for extended reach installations. Temperature-rated variants extend operation to 121°C (250°F) continuous ambient, suitable for hot-section turbine bearing pedestals. The series reached product maturity in the mid-2010s and is now in a sustained-availability phase; Bently Nevada continues to supply new units, but the architecture is considered stable with no further major revisions planned.

190501 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified 190501 Velomitor CT product range, organized by cable length and termination style. Each model shares the same sensing element and sensitivity specification (100 mV/in/s ± 5%) but differs in mechanical interface and hazardous-area certification.

190501-01-00-CN: Velomitor CT, 1 m cable, conduit entry, no connector, standard temp.
190501-02-00-CN: Velomitor CT, 2 m cable, conduit entry, no connector, standard temp.
190501-04-00-CN: Velomitor CT, 4 m cable, conduit entry, no connector, standard temp — primary stocking SKU.
190501-08-00-CN: Velomitor CT, 8 m cable, conduit entry, no connector, standard temp.
190501-16-00-CN: Velomitor CT, 16 m cable, conduit entry, no connector, standard temp.
190501-04-00-CC: Velomitor CT, 4 m cable, conduit entry, with MIL-C-5015 connector, standard temp.
190501-08-00-CC: Velomitor CT, 8 m cable, conduit entry, with MIL-C-5015 connector, standard temp.
190501-16-00-CC: Velomitor CT, 16 m cable, conduit entry, with MIL-C-5015 connector, standard temp.
190501-04-01-CN: Velomitor CT, 4 m cable, conduit entry, no connector, high-temp variant (121°C).
190501-08-01-CN: Velomitor CT, 8 m cable, conduit entry, no connector, high-temp variant (121°C).
190501-16-01-CN: Velomitor CT, 16 m cable, conduit entry, no connector, high-temp variant (121°C).
190501-04-01-CC: Velomitor CT, 4 m cable, conduit entry, with connector, high-temp variant (121°C).
190501-08-01-CC: Velomitor CT, 8 m cable, conduit entry, with connector, high-temp variant (121°C).
190501-16-01-CC: Velomitor CT, 16 m cable, conduit entry, with connector, high-temp variant (121°C).
190501-04-00-CN-T: Velomitor CT, 4 m cable, ATEX/IECEx certified, conduit entry, no connector.
190501-08-00-CN-T: Velomitor CT, 8 m cable, ATEX/IECEx certified, conduit entry, no connector.
190501-16-00-CN-T: Velomitor CT, 16 m cable, ATEX/IECEx certified, conduit entry, no connector.

Quality Control for the 190501 Range

Each 190501 unit processed by DriveKNMS undergoes a structured acceptance test protocol prior to dispatch. Sensitivity verification is performed on a calibrated shaker table at 79.6 Hz (500 RPM equivalent), confirming output within the ±5% tolerance band of the nominal 100 mV/in/s specification. Frequency response is swept from 2 Hz to 1000 Hz to verify flat response within the rated ±3 dB window. Insulation resistance between the signal conductors and the transducer housing is measured at 500 VDC (minimum 100 MΩ) to confirm cable jacket integrity. Connector and conduit entry threads are inspected for mechanical damage and re-torqued to specification. Units with ATEX/IECEx markings are cross-referenced against the certificate database to confirm the marking matches the declared Ex classification. All test results are logged against the unit serial number and supplied with the shipment documentation.