Bently Nevada 21128-03-01 Velocity Transducer Housing, NEMA 4X, IP65

Technical Specifications Breakdown

Key parameters for the 21128-03-01 are listed below for quick reference:

Industry Applications

Use it to protect velocity sensors on pumps, compressors, turbines, and fans where washdowns or corrosive atmospheres are common. The 303 stainless steel construction resists rust and chemical attack, while the NEMA 4X/IP65 rating ensures reliable operation even when exposed to high-pressure water jets.

Installation & Setup Guidance

When installing the 21128-03-01, ensure the cable exit fitting (1/2-in NPT plug) is properly sealed to maintain the IP65 rating. The internal mounting thread is 1/2-in 20 UNF for the 21128 and CA21128 versions. For Velomitor CT sensors, or when installing a 9200 or 74712 Seismoprobe with an isolated base, the tall cap option is required. Use cable part number 89477-AA to connect the Velomitor sensor to a monitor. Always verify that the O-ring (neoprene) is seated correctly before final assembly.

Maintenance & Reliability

Periodically inspect the housing for signs of corrosion, O-ring degradation, or seal damage. Replace the neoprene O-ring if any cracking or compression set is observed. Clean the exterior with mild detergents; avoid abrasive tools that could scratch the stainless steel surface. The housing is not submersible, so avoid prolonged immersion. Regular checks ensure the NEMA 4X/IP65 protection remains intact.

Robust Protection for Critical Velocity Measurements

In industrial environments, velocity sensors face constant threats from hose-directed water, corrosive agents, physical impact, and other adverse conditions. The Bently Nevada 21128-03-01 velocity transducer housing is engineered to shield these sensitive instruments, ensuring uninterrupted monitoring and extended service life. Constructed from 303 stainless steel, this housing meets NEMA 4X and IP65 requirements when properly installed, making it a reliable choice for non-hazardous areas where moisture and corrosion are primary concerns.

Compatibility & Integration

The 21128-03-01 is designed for Bently Nevada velocity sensors. It is the preferred housing for non-hazardous environments. For explosion-proof requirements, the CA21128 version is CSA certified for Classes I, II, III, Division 1, Groups B through G. For BASEEFA-approved installations, use the BA42608 housing. Each housing supports a tall cap option for specific sensor configurations.

Selection Guide & Purchasing Advice

Choose the 21128-03-01 for standard non-hazardous applications requiring robust environmental protection. Verify your sensor model and mounting thread requirements before ordering. AutoDCSTech stocks this housing and can advise on the correct version for your installation. Contact us to confirm lifecycle status and availability.