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    Apter Power supplies original Bently Nevada 21000 series aluminum housings, ensuring certified environmental shielding and stable physical mounting for critical transducers.

21000-28-05-40-028-04-02

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The Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly is a rugged and highly engineered aluminum probe housing assembly specifically designed to externally mount proximity probes.
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Technical specifications for 21000-28-05-40-028-04-02

  • Manufacturer:
    Bently Nevada
  • Part Number:
    21000-28-05-40-028-04-02
  • Product Family:
    21000, 24701, and 164818 Proximity Probe Housing A
  • Product Type:
    Proximity Probe Housing Assembly
  • Stock:
    1
  • Probe with Connector:
    3300 XL 8mm probe, selectable hazardous area approvals
  • Probe Cable Length:
    0.5 m (20 in)
  • Standoff Adapter:
    4.0 in
  • Probe Penetration:
    2.8 in
  • Fittings:
    One 3/4-14 NPT plug only
  • Mounting Thread:
    3/4-14 NPT
  • Weight:
    1.1 kg
  • Estimated shipping dimensions:
    35x8.5x8.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Use Cases Installation & Integration Configuration & Hardware

Features:

  • All-Metal Aluminum Housing for External Proximity Probe Mounting
  • CSA Explosion-Proof Certification with Selectable Hazardous Area Approvals
  • Integrated 3300 XL 8mm Probe, 4.0 in Standoff Adapter, and 0.5 m Cable Assembly
The Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly serves as an all-metal external mounting solution for 3300 XL 8mm proximity probes, providing explosion-proof protection in hazardous areas. The Bently Nevada 21000-28-05-40-028-04-02 features a dome cover that screws into the body of the housing, threaded ports for conduit connections, a probe sleeve of optional length, O-rings, a thread seal, and one 3/4-14 NPT plug fitting with a 3/4-14 NPT mounting thread. The Bently Nevada 21000-28-05-40-028-04-02 is constructed from aluminum and carries Canadian Standards Association (CSA) approvals, rated explosion proof for hazardous areas.

The Bently Nevada 21000-28-05-40-028-04-02 provides essential housing functions common to the entire proximity probe installation, and is a critical component of the external monitoring path, directly affecting the proper mounting and protection of the proximity probe system. The Bently Nevada 21000-28-05-40-028-04-02 occupies the designated probe mounting position and requires proper installation of the O-rings and thread seal to maintain the explosion-proof integrity of the enclosure.

For alternative material requirements, the Bently Nevada 21000-28-05-40-028-04-02 system is compatible with the 24701 stainless steel probe housing assembly and the 164818 Proximity Probe Housing Assembly as equivalent options. In addition to the standard aluminum 21000 configuration, the Bently Nevada 21000-28-05-40-028-04-02 also supports optional conduit fittings and optional standoff adapters. Using this configuration, the housing assembly provides threaded ports for conduit connections and accommodates optional probe sleeve lengths.

The 21000-28-05-40-028-04-02 Bently Nevada Proximity Probe Housing Assembly may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly Specs

General

  • Manufacturer Bently Nevada
  • Model 21000-28-05-40-028-04-02
  • Condition New Original ready stock
  • Product Family 21000-28-05-40-028-04-01,21000-28-05-40-028-04-04
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Online Probe Maintenance: Enables technicians to adjust the probe gap or completely replace the proximity probe from outside the machine casing without requiring a system shutdown.
  • Critical Asset Monitoring: Deployed on high-speed rotating assets—such as steam turbines, centrifugal compressors, gearboxes, large pumps, and electric motors—to monitor radial vibration, axial thrust position, and shaft speed (Keyphasor).
  • Hazardous Environments: Certified as a CSA Type 4 enclosure and rated explosion-proof, making it suitable for volatile environments like oil & gas refineries, petrochemical processing plants, and power generation facilities.
  • API 670 Compliance: Specifically designed to meet industry standards for machinery protection systems mandating external housing assemblies.
  • Mechanical Mounting: The housing is threaded directly into a machine casing or counter-bored port using its 3/4-14 NPT mounting thread (-02). Proper thread sealants and O-rings must be applied to prevent any oil or process gas leaks.
  • Sleeve Penetration: The 2.8-inch sleeve (-028) penetrates the machine wall, correctly positioning the reverse-mount probe tip just millimeters away from the target shaft surface.
  • Conduit Connection: The housing body provides a conduit outlet. The included 3/4-14 NPT plug (-04) must be integrated into a certified explosion-proof conduit system to maintain environmental sealing (IP66 / Type 4 rating).
  • Cable Routing: The 0.5-meter internal probe cable resides entirely inside the protective dome cover. It connects there to an extension cable, which is then routed via conduit to an external Bently Nevada Proximitor Sensor.
  • Physical Gap Setting: Because proximity sensors do not use internal software configurations, setup is purely physical. Technicians manually rotate the probe inside the sleeve to set the physical gap relative to the shaft.
  • Voltage Calibration: The gap is adjusted until the DC voltage output reads approximately -10.0 Vdc (the electrical midpoint of a standard 3300 XL linear range), verified using a digital multimeter connected to the Proximitor sensor.
  • Locking Mechanism: Once the correct voltage is established, external locknuts are tightened down to ensure the probe remains securely in place during high-vibration operations.
  • System Mapping: The Proximitor sensor output (typically 200 mV/mil) is wired back to a monitoring rack, such as a Bently Nevada 3500 System. Using the 3500 configuration software, the channel must be programmed to match the 3300 XL 8mm transducer type and its respective scale factor to ensure accurate display data.
Description
The Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly is specifically designed to handle the need for explosion-proof sensor protection in hazardous industrial environments, solving the problem of safely deploying proximity probes in areas where flammable gases or vapors may be present. The Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly is rated for applications requiring Canadian Standards Association (CSA) approvals, making it suitable for use in oil and gas, petrochemical, power generation, and other heavy industrial sectors where vibration monitoring is critical to operational safety and equipment reliability.

For installation and integration, the Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly is designed to externally mount proximity probes using its 3/4-14 NPT mounting thread and all-metal aluminum construction. The Bently Nevada 21000-28-05-40-028-04-02 assembly accommodates optional conduit fittings and standoff adapters, allowing flexible integration into existing conduit systems and machinery configurations. Users installing the Bently Nevada 21000-28-05-40-028-04-02 should ensure proper sealing with the included O-rings and thread seal to maintain the explosion-proof integrity of the housing in hazardous area installations.

For upgrade recommendations, the Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly offers a reliable foundation for expanding vibration monitoring capabilities, with its compatibility with 3300 XL 8mm probe technology and selectable hazardous area approvals. Users considering system enhancements may evaluate the Bently Nevada 21000-28-05-40-028-04-02 alongside the 24701 stainless steel probe housing assembly or 164818 Proximity Probe Housing Assembly for applications requiring alternative material specifications. The Bently Nevada 21000-28-05-40-028-04-02 maintains full CSA explosion-proof ratings, ensuring that upgrades and integrations continue to meet stringent hazardous area safety requirements.
Alternative Names
21000 28 05 40 028 04 02 21000-28-05-40-028-04-01 21000-28-05-40-028-04-04 21000-28-05-40-028-03-02 21000-28-05-40-028-02-02 21000-28-05-40-028-01-02 21000-28-05-40-028-00-02
Technical notes
The Bently Nevada 21000-28-05-40-028-04-02 proximity probe housing assembly features a 3/4-14 NPT mounting thread and comes with a 3/4-14 NPT plug connector. It integrates a high-performance 3300 XL 8mm probe (with connector), a 0.5-meter (20-inch) long probe cable, a 4.0-inch bracket adapter, and a precise 2.8-inch probe penetration depth.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What equipment can the 21000-28-05-40-028-04-02 support?
The housing assembly is commonly installed on large pumps, compressors, turbines, gearboxes, and other rotating machinery to support shaft vibration and axial position measurements.
Does the 21000-28-05-40-028-04-02 support standard conduit connections?
Yes. The housing is designed to work with standard conduit fittings, making it easier to integrate into existing machinery monitoring systems without extensive modifications.
What problems does the 21000-28-05-40-028-04-02 solve?
The housing assembly helps prevent premature probe failure caused by moisture, mechanical impact, dust, and hazardous atmospheres. It also improves measurement reliability by protecting the sensor from environmental damage.

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