Description

Designed specifically for the extreme conditions of wet cooling towers, the Bently Nevada 190501-01-00-04 is a specialized Velomitor CT Velocity Transducer engineered for low-speed machinery monitoring. This high-reliability vibration sensor measures casing vibration velocity, making it ideal for tracking structural and mechanical faults in cooling tower fans, gearboxes, and low-speed shaft assemblies.

The core construction of the 190501-01-00-04 features a hermetically sealed 316L stainless steel housing that completely isolates the internal sensing elements from 100% condensing humidity, corrosive water chemistry, and ambient contaminants. Unlike traditional velocity transducers that utilize moving coils prone to mechanical wear, this solid-state transducer employs internal integration electronics to convert acceleration measurements into a highly accurate velocity output signal, ensuring long-term measurement stability and minimal calibration drift.

Integrated easily into industrial monitoring systems, this sensor connects directly to the Bently Nevada 3500 Machinery Protection System via the 3500/42M Reciprocating Machinery Monitor or 3500/42 micro-locked channels, as well as distributed control systems (DCS) and PLC analog inputs that support dynamic vibration integration.

Features

• Solid-state design with zero moving parts, eliminating mechanical wear and drift.
• Hermetically sealed 316L stainless steel casing engineered to withstand continuous water exposure and wet cooling tower microclimates.
• Internal integration circuit that converts acceleration to velocity for clean, noise-immune output signal transmission.
• Optimized low-frequency response down to 1.5 Hz to capture structural resonance and low-speed rotational faults.
• Standard top-exit 2-pin MIL-C-5015 connector configuration.
• Broad dynamic range designed to capture both subtle imbalance forces and severe mechanical impacts.

Applications

• Cooling tower fan drive assemblies
• Air-cooled heat exchangers (fin fans)
• Low-speed industrial gearboxes and agitators
• Water and wastewater treatment circulating pumps
• Exhaust ventilation systems

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting Torque: Tighten the transducer to the mounting surface using a maximum torque of 34 N-m (25 ft-lb) to ensure proper acoustic coupling without damaging the sensor threads.
• Surface Preparation: Ensure the mating surface is flat, clean, and free of paint, scale, or debris. Use a light coating of silicone grease or coupling fluid before mounting.
• Cabling and Routing: Always use shielded, twisted-pair cabling to minimize electromagnetic interference (EMI). Route cables through protective conduit or secure them with heavy-duty cable ties in cooling tower plenums to prevent mechanical strain.
• Grounding: Ensure the shield is grounded at the monitor end only to prevent ground loops that introduce electronic noise into the vibration signal.

Compliance and Certifications

• ATEX (Zone 0/1/2 Hazardous Areas)
• IECEx
• CSA/US Class I, Division 1 & 2 Groups A, B, C, D
• CE Compliant