Bently Nevada 21128-12-01 Velocity Transducer Housing – Corrosion-Resistant Enclosure

Technical Specifications Breakdown

Key parameters for the 21128-12-01 are listed below for quick reference:

Field Applications

Wash-Down Areas in Food Processing

In food and beverage plants, high-pressure wash-down hoses can damage unprotected velocity sensors. The 21128-12-01 housing’s NEMA 4X/IP65 rating and 303 stainless steel construction resist corrosion and water ingress, reducing sensor replacement frequency and downtime.

Outdoor Vibration Monitoring

For rotating equipment exposed to rain and temperature swings, this housing maintains sensor integrity from -29°C to +121°C. The tall cap accommodates Velomitor CT sensors, enabling accurate vibration data collection in harsh outdoor conditions.

Installation Guidance

When installing the 21128-12-01, ensure the O-ring (neoprene) is properly seated to maintain the moisture seal. Use the 3/4-in 14 NPT mounting thread for secure attachment. For Velomitor CT sensors, the tall cap is required. Cable part number 89477-AA is necessary to connect the sensor to a monitor. The 1/2-in NPT plug should be tightened to prevent moisture entry. Always verify the housing is not submersed, as it is moisture-resistant but not submersible.

Maintenance and Reliability

Inspect the neoprene O-ring periodically for cracks or deformation. Replace if damaged to preserve the IP65 seal. Clean the 303 stainless steel surface with mild detergent and water; avoid abrasive cleaners that could compromise corrosion resistance. Check the cable exit fitting for tightness after any maintenance. These steps extend housing life and protect the velocity sensor investment.

Robust Protection for Velocity Sensors

Industrial environments expose vibration sensors to water spray, corrosive agents, and physical impact. The Bently Nevada 21128-12-01 velocity transducer housing shields sensors from these hazards, ensuring reliable machinery monitoring.

Compatibility and Integration

The 21128-12-01 housing is designed for Bently Nevada velocity sensors including Velomitor CT, 9200, and 74712 Seismoprobe (with isolated base). The 1/2-in 20 UNF internal mounting thread fits standard sensor bases. For BA42608 sensors, use the 5/8-in 18 UNF-2B thread. Always confirm sensor compatibility before ordering.

Selection Guide

Choose the 21128-12-01 for non-hazardous environments requiring corrosion resistance and water protection. The tall cap option is mandatory for Velomitor CT installations. For hazardous areas, consider the CA21128 variant. AutoDCSTech stocks this housing for quick delivery. Please verify current lifecycle status and availability with AutoDCSTech before ordering.