Bently Nevada 21128-04-02 Velocity Transducer Housing | Water-Resistant Enclosure

Product Overview: Bently Nevada 21128-04-02 Velocity Transducer Housing

Velocity sensors face constant risk from water spray, corrosion, and harsh industrial handling.
The Bently Nevada 21128-04-02 housing delivers strong protection with stainless steel strength.

• Core Purpose: The housing shields velocity transducers from hose-directed water and corrosion.
• Material Strength: 303 stainless steel resists rust and mechanical abuse in industrial environments.
• Compliance: Proper installation meets NEMA 4X and IP65 sealing requirements.
• Preferred Use: The 21128 series fits most non-hazardous industrial applications.

Technical Specifications (Brand + Model Included)

• Brand: Bently Nevada
• Model: 21128-04-02
• Category: Water and Corrosion-resistant Velocity Transducer Housing
• Temperature Range: -29°C to +121°C (-20°F to +250°F)
• Weight: 1.6 kg (3.55 lb) without sensor or fittings
• Outlet Port Size: 1/2-in NPT
• Internal Mounting Thread:
  • 21128 / CA21128 → 1/2-in 20 UNF
  • BA42608 → 5/8-in 18 UNF-2B
• Ordering Code Structure: 21128 – AA – BB
  • Mounting Thread and Cap Option:
    • 04 → 1/2-in 14 BSP (G 1/2-in)
  • Cable Exit Fitting Option:
    • 02 → 1/2-in NPT explosion-proof fitting

Installation Notes and Sensor Compatibility

• Tall Cap Requirement: Customers need the tall cap for Velomitor CT installation.
• Seismoprobe Support: The tall cap fits 9200 or 74712 Seismoprobe with isolated base.
• Connection Cable: Cable part number 89477-AA connects the Velomitor sensor to monitors.
• Best Practice: Install fittings tightly to maintain IP65 sealing integrity.

Package Contents and Shipping

• 1 × Bently Nevada 21128-04-02 Velocity Transducer Housing
• Integrated Neoprene O-ring sealing assembly
• Explosion-proof cable exit fitting configuration
• Shipping options: FedEx, UPS, DHL

FAQ: Selection and Application Guidance

• Question:
  Which environment suits the 21128 housing best?
• Answer:
  Most non-hazardous industrial areas benefit from its corrosion and water resistance.
• Question:
  When should I choose the tall cap option?
• Answer:
  You need the tall cap when installing Velomitor CT or isolated-base Seismoprobes.
• Question:
  Does the housing support underwater installation?
• Answer:
  The design resists moisture but does not support submersion conditions.
• Question:
  Which cable connects the Velomitor sensor to the monitor?
• Answer:
  Cable part number 89477-AA provides the required monitor connection.
• Question:
  How do I confirm correct thread compatibility before ordering?
• Answer:
  Match mounting thread codes with your sensor base type and outlet port requirements.

Contact Information

• Email Inquiries:
  info@oiltechcontrols.com
• WhatsApp Support:
  +86 158 8020 0923

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