21128-01-01 Bently Nevada | Velocity Transducer Housing

21128-01-01 Velocity Transducer Housing by Bently Nevada — Unthreaded Base, 1/2-in NPT Plug

Technical Specifications

• Brand: Bently Nevada
• Model: 21128-01-01
• Category: Velocity Transducer Housing
• Material: 303 stainless steel for durability and corrosion resistance
• Mounting Thread and Cap Option: 01 = Unthreaded base, 28.5 mm (1.125 in) diameter
• Cable Exit Fitting Option: 01 = 1/2-in NPT plug
• Outlet Port Size: 1/2-in NPT
• Internal Mounting Thread: 21128 and CA21128 use 1/2-in 20 UNF; BA42608 uses 5/8-in 18 UNF-2B
• Temperature Rating: -29°C to +121°C (-20°F to +250°F)
• Moisture Resistance: Resistant to moisture and corrosion but not submersible
• O-ring Material: Neoprene
• Weight: 1.6 kg (3.55 lb) without velocity sensor or fittings
• Environmental Protection: Designed to meet NEMA 4X and IP65 requirements when properly installed

Compatible Models and Options

• The 21128 housing is preferred for most non-hazardous environmental conditions.
• The CA21128 is the explosion-proof version certified by CSA for Classes I, II, and III, Division 1, Groups B, C, D, E, F, and G.
• The CA21128 must be ordered and shipped with a CSA-approved velocity sensor installed in the assembly.
• The BA42608 housing is used for BASEEFA-approved installations requiring compliance with BS EN 60079-14.
• The BA42608 provides environmental and physical protection to comply with the IP65 rating defined in IEC standard 144.
• Each housing is now available with a tall cap option.
• The tall cap option is required when installing a Velomitor CT in a housing.
• The tall cap option is also required when installing a 9200 or 74712 Seismoprobe with an isolated base into the 21128 housing.
• When using the 21128 Housing, cable part number 89477-AA is necessary to connect the Velomitor Sensor to a monitor.

Installation Guide

• Verify the unthreaded base diameter matches your mounting surface before installation.
• Use the 28.5 mm (1.125 in) unthreaded base for secure surface attachment.
• Install the 1/2-in NPT plug fitting to seal the cable exit port.
• Confirm the Neoprene O-ring sits properly to maintain moisture and corrosion resistance.
• Do not submerge the housing in water or other liquids during operation.
• Use cable part number 89477-AA to connect a Velomitor Sensor to a monitor.
• Select the tall cap option when using a Velomitor CT or an isolated-base 9200 or 74712 Seismoprobe.
• Follow local electrical codes and hazardous-area requirements for explosion-proof installations.

Package Contents

• 1 x Bently Nevada 21128-01-01 Velocity Transducer Housing
• 1 x Neoprene O-ring
• 1 x Unthreaded base, 28.5 mm (1.125 in) diameter
• 1 x 1/2-in NPT plug fitting
• Note: Velocity sensor and cable 89477-AA are not included unless ordered separately.

Shipping and Support

• We ship with FedEx, UPS, and DHL to meet different delivery needs.
• We dispatch most orders within 5 days after payment confirmation.
• We support 30-day returns for eligible items under our return policy.
• We offer new original stock for this Bently Nevada housing.
• We keep popular models in stock for fast order processing.

FAQ

• Q: What is the temperature range of the 21128-01-01?
  A: The housing operates from -29°C to +121°C (-20°F to +250°F).
• Q: Is the 21128-01-01 submersible?
  A: No, it resists moisture and corrosion but is not submersible.
• Q: What material is the housing made of?
  A: It is constructed of 303 stainless steel for durability.
• Q: What mounting base does the 21128-01-01 use?
  A: It uses an unthreaded base with a 28.5 mm (1.125 in) diameter.
• Q: What cable exit fitting comes with this housing?
  A: It includes a 1/2-in NPT plug fitting.
• Q: When do I need the tall cap option?
  A: You need it for a Velomitor CT or an isolated-base 9200 or 74712 Seismoprobe in the 21128 housing.
• Q: Which cable connects a Velomitor Sensor to a monitor?
  A: Cable part number 89477-AA connects the Velomitor Sensor to a monitor.
• Q: Is the 21128-01-01 explosion-proof?
  A: The 21128 is for non-hazardous areas; choose CA21128 for explosion-proof CSA-certified use.
• Q: What is the weight of the housing?
  A: It weighs 1.6 kg (3.55 lb) without a velocity sensor or fittings.
• Q: What O-ring material does it use?
  A: It uses a Neoprene O-ring for sealing.

Contact Information

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