Bently Nevada 21128-04-03 Velocity Housing | IP65 Stainless Steel Transducer Enclosure

Bently Nevada 21128-04-03 Velocity Transducer Housing

Bently Nevada 21128-04-03 is a corrosion and water-resistant velocity transducer housing made of 303 stainless steel. It offers strong protection for velocity sensors against physical damage, corrosion, and harsh environments. Built to meet NEMA 4X and IP65 standards, it ensures reliable use in industrial monitoring systems.

• Manufacturer: Bently Nevada
• Model: 21128-04-03
• Material: 303 Stainless Steel
• Mounting Thread & Cap Option: 04 = 1/2-in 14 BSP (G 1/2-in)
• Cable Exit Fitting: 03 = 1/2-in NPT, explosion-proof with cable grip
• Temperature Range: -29°C to +121°C (-20°F to +250°F)
• Moisture Resistance: Withstands water spray and corrosion (not submersible)
• O-ring Material: Neoprene
• Weight: 1.6 kg (3.55 lb)
• Warranty: 12 Months
• Shipping: FedEx / UPS / DHL Express Available

21128-04-03 Configuration Structure

21128 - AA - BB
AA = 04 → 1/2-in 14 BSP (G 1/2-in)
BB = 03 → 1/2-in NPT, explosion-proof cable grip

Technical Highlights

• Strong stainless steel body for industrial protection
• Explosion-proof design for hazardous environments
• Compatible with Velomitor CT and Seismoprobe models
• Meets global safety standards (NEMA 4X & IP65)
• Resistant to vibration and high humidity
• Perfect for turbines, compressors, and pump monitoring

Specifications Summary

• Outlet Port Size: 1/2-in NPT
• Internal Mounting Threads: 1/2-in 20 UNF (21128/CA21128), 5/8-in 18 UNF-2B (BA42608)
• Operating Temp: -29°C to +121°C (-20°F to +250°F)
• Ingress Protection: IP65 (non-submersible)
• Cable Required: 89477-AA for Velomitor connection

Product Advantages

• Excellent environmental protection for velocity sensors
• Optional tall cap for additional sensor space
• Designed for easy field installation
• High corrosion resistance in marine or industrial sites
• Reliable Bently Nevada quality with full warranty

Frequently Asked Questions (FAQ)

• Q1: Can the 21128-04-03 housing be used in high-humidity environments?
• Yes, it is designed to resist moisture and corrosion. However, it is not suitable for full submersion.
• Q2: What cable should I use to connect the Velomitor Sensor?
• Use Bently Nevada cable part number 89477-AA for proper connection and signal integrity.
• Q3: How should the housing be mounted for best results?
• Mount securely using the 1/2-in 14 BSP thread and ensure all seals are properly tightened to maintain IP65 protection.
• Q4: Can I use it in hazardous areas?
• Yes, this model offers explosion-proof cable fittings, suitable for Class I, II, and III hazardous zones when properly certified.
• Q5: What is the maintenance recommendation for long-term use?
• Inspect O-rings every 6 months and replace them if any cracks or hardening appear. Clean the housing with mild detergent only.

Contact Information

For inquiries or quotations, please contact:
sales@powergearx.com or
+86 18030005825

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