21128-12-02 Bently Nevada - Velocity Transducer Housing

Bently Nevada 21128-12-02 Velocity Transducer Housing for Harsh Industrial Environments

Key Technical Specifications

• Brand: Bently Nevada
• Model: 21128-12-02
• Category: Velocity Transducer Housing
• Mounting Thread and Cap Option: 3/4-in 14 NPT with tall cap (code 12)
• Cable Exit Fitting Option: 1/2-in NPT explosion-proof fitting (code 02)
• Temperature Rating: -29°C to +121°C (-20°F to +250°F)
• Moisture Resistance: Resists moisture and corrosion, but does not support submersion
• O-ring Material: Neoprene
• Weight: 1.6 kg (3.55 lb) without sensor or fittings
• Outlet Port Size: 1/2-in NPT
• Internal Mounting Thread: 1/2-in 20 UNF for 21128 and CA21128; 5/8-in 18 UNF-2B for BA42608

Why the Tall Cap Option Matters

• You need the tall cap option to install a Velomitor CT inside this housing.
• You also need the tall cap option when mounting a 9200 or 74712 Seismoprobe with an isolated base into the 21128 housing.
• The tall cap version supports more sensor configurations than the standard cap.
• This option helps you avoid fit issues during field installation.

Installation Guide

• Use cable part number 89477-AA to connect a Velomitor sensor to a monitor when using the 21128-12-02 housing.
• Confirm the mounting thread matches your sensor base before you start.
• Apply the Neoprene O-ring correctly to maintain the moisture seal.
• Tighten the 1/2-in NPT cable exit fitting to secure the explosion-proof connection.
• Do not submerge the housing in water, because it is moisture-resistant but not submersible.
• Verify the NEMA 4X and IP65 rating after installation to ensure proper protection.

Core Performance and Environmental Features

• The 303 stainless steel body resists corrosion from chemicals and washdown.
• The housing protects against hose-directed water and physical abuse.
• The design suits non-hazardous environmental conditions in most industrial plants.
• The Neoprene O-ring seals out moisture and extends sensor life.
• The operating temperature range supports both cold and hot process areas.
• The explosion-proof cable exit fitting adds safety in classified locations.

Packaging List

• One Bently Nevada 21128-12-02 Velocity Transducer Housing
• One Neoprene O-ring
• One tall cap (option 12)
• One 1/2-in NPT explosion-proof cable exit fitting (option 02)
• Mounting thread: 3/4-in 14 NPT

Shipping and Support

• We ship via FedEx, UPS, and DHL to meet your delivery needs.
• We keep this item in stock for fast order processing.
• We dispatch your order within 5 days after you place it.
• We support 30-day returns for your peace of mind.
• We supply brand new original products only.

Frequently Asked Questions

• Q: What is the temperature range for the 21128-12-02?
  A: The housing operates from -29°C to +121°C (-20°F to +250°F).
• Q: Can I install a Velomitor CT in this housing?
  A: Yes, but you must choose the tall cap option, which this model includes.
• Q: Is this housing submersible?
  A: No, it resists moisture and corrosion but does not support submersion.
• Q: What cable do I need for a Velomitor sensor?
  A: You need cable part number 89477-AA to connect the sensor to a monitor.
• Q: What is the mounting thread on the 21128-12-02?
  A: It uses a 3/4-in 14 NPT mounting thread with a tall cap.
• Q: What material is the O-ring?
  A: The O-ring is made of Neoprene for moisture resistance.
• Q: Does this housing meet NEMA 4X and IP65?
  A: Yes, it meets both ratings when you install it properly.
• Q: How much does the housing weigh?
  A: It weighs 1.6 kg (3.55 lb) without the sensor or fittings.

Contact Information

• Email: sales@nex-auto.com
• Phone/WhatsApp: +86 153 9242 9628
• Partner: NexAuto Technology Limited

Partner NexAuto Technology Limited : https://www.nex-auto.com/