Bently Nevada 190501-01-99-01 Velomitor CT Velocity Transducer

Description

The 190501-01-99-01 Velomitor CT Velocity Transducer is a low-frequency piezo-velocity sensor designed specifically for measuring casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies. This configuration features a 3/8-in 24 to 3/8-in 24 stud (Option 01) for mounting and utilizes a MIL-C-5015 connection interface (Option 99) with an included 32-foot cable, suitable for systems requiring non-standard connection integration. This transducer effectively measures vibration amplitudes at low frequencies, including those generated by fan motors and speed reducers, typically operating at or above 90 rpm.

The 190501 series is engineered to provide reliable casing measurements by converting mechanical vibration into a proportional voltage signal. This unit is configured with Option 01 for agency approvals, including CSA, ATEX, and IECEx certifications for hazardous area applications. Proper installation on the bearing housing or machine casing is critical to maintaining frequency response and preventing false signal generation.

Features

• Mounting (Option 01): Includes 3/8-in 24 to 3/8-in 24 stud for standard mechanical installation.
• Connection (Option 99): MIL-C-5015 connection interface with factory-included 32-foot cable.
• Agency Approval (Option 01): Certified for hazardous environments, including Class I, Division 1 and Zone 0/1 applications.
• Frequency Response: Optimized for low-frequency monitoring, 1.5 Hz to 1.0 kHz (+/- 3.0 dB).
• Sensitivity: 100 mV/in/s (3.94 mV/mm/s) +/- 5% at 100 Hz.
• Construction: 316L stainless steel case for environmental protection and durability.

Applications

• Cooling tower fan assembly vibration monitoring
• Air-cooled heat-exchanger fan monitoring
• Low-speed rotating machinery casing vibration (100 to 300 rpm typical)
• Hazardous area vibration monitoring (Class I, Div 1 / Zone 0/1)

Ordering Information

Technical Specifications

Installation Guidelines

• Mount the transducer directly on the bearing housing or machine casing for accurate velocity measurement.
• Tighten mounting stud to 4.5 N-m (40 in-lbf) +/- 5 in-lbf.
• Ensure the cable is secured to prevent strain on the MIL-C-5015 connector.
• For hazardous area installations, adhere to wiring requirements per drawing 167536 and local electrical codes.

Compliance and Certifications

• ATEX/IECEx: Ex ia IIC T3 Ga / Ex ec IIC T3 Gc / Ex tc IIIC T200C Dc
• Hazardous Area: Class I, Div 1, Groups A, B, C, D; Class II, Groups E, F, G; Class III
• Directives: CE, RoHS, EMC Directive 2014/30/EU