21128-02-01 Bently Nevada 21128 Velocity Transducer Housing

Product Overview

Bently Nevada designs durable velocity transducer housings for harsh industrial environments, providing unmatched protection and reliability for vibration monitoring systems.

The 21128, CA21128, and BA42608 housings resist corrosion, moisture, and physical damage while maintaining NEMA 4X and IP65 protection standards.

Technical Specifications

• Brand: Bently Nevada
• Models: 21128 / CA21128 / BA42608
• Temperature Rating: -29°C to +121°C (-20°F to +250°F)
• Mounting Thread: 3/4-in 14 NPT
• Outlet Port Size: 1/2-in NPT
• Internal Thread: 1/2-in 20 UNF (21128 & CA21128) / 5/8-in 18 UNF-2B (BA42608)
• Weight: 1.6 kg (3.55 lb) without sensor or fittings
• O-ring Material: Neoprene
• Moisture Resistance: Resistant to moisture and corrosion but not submersible
• Accessory: MOD 148264-02
• Protection: NEMA 4X / IP65 compliant when properly installed
• Explosion Proof: CA21128 certified for Classes I, II, III, Div. 1, Groups B–G

Design Highlights & Compatibility

• Constructed from 303 stainless steel for strength and corrosion resistance.
• Available tall cap option for installing Velomitor CT or 9200 / 74712 Seismoprobes.
• The CA21128 variant offers CSA-certified explosion protection for hazardous sites.
• MOD 148264-02 accessory enhances cable routing and mechanical stability.
• Use cable part number 89477-AA with the 21128 housing to connect the Velomitor sensor to a monitor.

Installation Guide

• Install housing using a 3/4-in 14 NPT mounting thread for secure attachment.
• Use cable 89477-AA to connect a Velomitor sensor to a monitoring unit.
• Select the tall cap option for Velomitor CT, 9200, or 74712 probe installations.
• Ensure O-ring is properly seated and cap tightened to maintain seal integrity.
• Follow sealing and conduit best practices to ensure NEMA 4X/IP65 protection.

Packing List

• 1 × Velocity Transducer Housing 21128-02-01
• 1 × Cap assembly and Neoprene O-ring
• 1 × Accessory MOD 148264-02
• 1 × Quick installation guide and mounting screws
• Shipped via FedEx, UPS, or DHL

FAQ

• Question:
  How do I choose between 21128 and CA21128 housings?
  Answer:
  Use CA21128 in hazardous zones requiring CSA explosion-proof certification, and 21128 in standard environments.
• Question:
  Can the 21128 housing hold a Velomitor CT?
  Answer:
  Yes, use the tall cap version for adequate clearance and proper sensor fit.
• Question:
  What cable is required to connect a Velomitor sensor?
  Answer:
  Use 89477-AA cable for reliable data transmission and mechanical fit.
• Question:
  Can this housing be submerged?
  Answer:
  No, it resists moisture and corrosion but is not rated for full submersion.
• Question:
  What is the recommended installation torque for the housing cap?
  Answer:
  Tighten until the O-ring compresses evenly to preserve sealing performance.

Contact & Orders

• For inquiries, email sales@powergearx.com or contact us via WhatsApp at +86 18030005825.

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