Bently Nevada 21128-01-02 Velocity Transducer Housing, NEMA 4X/IP65

Technical Specifications Breakdown

Key parameters for the 21128-01-02 are listed below for quick reference:

Industry Applications

Oil & Gas Refineries

In refineries, velocity sensors monitor machinery vibration in areas prone to hose-directed water and chemical splashes. The 21128-01-02 housing prevents sensor damage, reducing unplanned downtime. Its NEMA 4X rating ensures protection against corrosion from hydrocarbons and cleaning agents.

Water & Wastewater Treatment

Pump and motor vibration monitoring in treatment plants exposes sensors to constant moisture. This housing's IP65 rating and neoprene O-ring seal keep sensors dry and functional, even in high-humidity environments. The unthreaded base simplifies mounting on existing brackets.

Power Generation

Turbine and generator monitoring in power plants requires robust enclosures. The 21128-01-02 withstands temperatures from -29°C to +121°C, covering most ambient conditions. The 1/2-in NPT explosion-proof fitting allows secure cable routing in hazardous areas.

Installation & Setup Guidance

Mount the housing on a stable surface using the unthreaded base (28.5 mm diameter). Ensure the mounting surface is clean and flat to maintain the IP65 seal. Use a 1/2-in NPT conduit or cable gland for the cable exit. For non-hazardous areas, standard fittings suffice; for explosive environments, select the CA21128 variant with CSA certification. Always verify that the velocity sensor is correctly installed before sealing the housing.

Maintenance & Reliability

Inspect the neoprene O-ring annually for cracks or compression set. Replace if damaged to maintain moisture resistance. Clean the exterior with mild detergent and water; avoid abrasive cleaners that could scratch the stainless steel. Check the cable exit fitting for tightness after any maintenance. The housing is not submersible, so avoid immersion in liquids.

Robust Environmental Protection for Velocity Sensors

Industrial environments expose velocity sensors to water spray, corrosive agents, and physical impact. The Bently Nevada 21128-01-02 velocity transducer housing provides a durable barrier, safeguarding sensitive measurement equipment. Constructed from 303 stainless steel, this housing meets NEMA 4X and IP65 requirements when properly installed, ensuring reliable operation in washdown areas and corrosive atmospheres.

Selection Guide & Purchasing Advice

Choose the 21128-01-02 for standard non-hazardous applications requiring NEMA 4X/IP65 protection. For explosion-proof needs, order the CA21128 variant with a CSA-approved sensor. The tall cap option is available for Velomitor CT sensors or 9200/74712 Seismoprobes with isolated bases. Contact AutoDCSTech to verify current lifecycle status and availability before ordering.