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- Bently Nevada
- 21000, 24701, and 164818 ProbeHousing Assemblies
- 21000-28-05-00-070-01-02
In Stock
Ships by Tuesday, July 28
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We provide 1 year warranty for all remaining parts.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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Technical specifications for 21000-28-05-00-070-01-02
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Product Model21000-28-05-00-070-01-02
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Product ParametersProximity Probe HousingAssemblies
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Tariff Code8537101190
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Country of originUSA
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Place of shipmentXiamen, China
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In stock1 unit
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Estimated Shipping Size8.5x8.5x30.5cm
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ManufacturerBently Nevada
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Weight1.08 kg
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Probe with Connector3300 XL 8mm probe, selectablehazardous area approvals
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Probe Cable Length0.5 m (20 in)
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Standoff AdapterNo standoff adapter
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Probe Penetration7.0
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FittingsOne 3/4-14 NPT explosion-proof fittingOne 3/4-14 NPT plug
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Mounting Thread3/4-14 NPT
Description
The Bently Nevada 21000-28-05-00-070-01-02 Proximity Probe Housing Assembly is an all-metal aluminum housing for externally mounting proximity probes on industrial machinery. 21000 provides a robust, environmentally sealed enclosure that protects the proximity probe and its electrical connections while allowing precise positioning of the probe tip relative to the rotating shaft or target surface for accurate vibration and position measurement.
21000 is specifically designed for use with Bently Nevada proximity transducer systems including the 3300XL 8mm, 3300 5mm, 3300XL NSv, and 3300XL 11mm proximity probe families. 21000 houses a reverse mount proximity probe with 3/8-24 UNF threads, which is secured within the housing assembly and positioned so that the probe tip faces the target surface through the probe sleeve. The complete assembly of 21000 includes a dome cover that screws into the body of the housing, threaded ports for conduit connections, a probe sleeve of user-specified length, O-rings for sealing, a thread seal, and optional conduit fittings or standoff adapters.
21000 is specifically designed for use with Bently Nevada proximity transducer systems including the 3300XL 8mm, 3300 5mm, 3300XL NSv, and 3300XL 11mm proximity probe families. 21000 houses a reverse mount proximity probe with 3/8-24 UNF threads, which is secured within the housing assembly and positioned so that the probe tip faces the target surface through the probe sleeve. The complete assembly of 21000 includes a dome cover that screws into the body of the housing, threaded ports for conduit connections, a probe sleeve of user-specified length, O-rings for sealing, a thread seal, and optional conduit fittings or standoff adapters.
Information
Overview
Manuals
Application Notes
Product Applications
Probe Insertion & Gap Adjustment
Features:
- Aluminum Probe Housing Assembly for External Mounting
- CSA Explosion-Proof Certification for Hazardous Areas
- Complete Assembly with Dome Cover, Probe Sleeve, and O-Rings
- 3/4-14 NPT Conduit Thread and Multiple Mounting Thread Options
The assembly is part of the Bently Nevada 21000/24701 Proximity Probe Housing family, which consists of a metal housing body, dome cover, threaded conduit ports, probe sleeve, O-rings, thread seals, reverse-mounted proximity probe arrangement, and optional fittings or standoff adapters. The 21000 series uses an aluminum housing body with a stainless-steel sleeve and is commonly applied in turbine, compressor, pump, and other critical rotating equipment installations.
The 21000-28-05-00-070-01-02 Bently Nevada Proximity Probe Housing Assemblies may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 21000-28-05-00-070-01-02 Proximity Probe Housing Assemblies Manuals, Datasheets, Drivers, 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.
21000 is available with Canadian Standards Association (CSA) approvals for explosion-proof applications. The CA21000 versions of 21000 are certified by CSA for use in hazardous areas including Class I, Division 1, Groups B, C, and D. For CA21000 housings, the mounting thread option F must be 02 (3/4-14 NPT), and options 02 and 03 for mounting threads have been machined to have approximately 5-7 full threads to increase mounting strength, rather than the standard NPT thread count. Only CA versions of 21000 are rated as explosion-proof by CSA when ordered with the E:00, E:01, E:02, or E:04 fitting options.
The probe sleeve length for 21000 is determined by the installation location and the distance from the mounting surface to the target surface. The probe lead must be longer than the sleeve length to ensure adequate cable routing within the housing. For 21000 installations where the probe penetration length (C plus D) exceeds 300 mm (12 inches), additional sleeve support must be added near the probe to prevent resonance from occurring. Bently Nevada offers a probe support and oil seal (part number 37948-01) for long sleeves that must pass through an inner bearing housing. Custom sleeve lengths for 21000 are also available upon request.
- Power Generation: Measures vibration, thrust, and eccentricity on turbines and generators
- Oil & Gas: Installed on compressors, turbo-expanders, and high-pressure injection pumps
- Chemical/Petrochemical: Monitors fans, blowers, and agitators to prevent catastrophic failures
- Water/Wastewater: Tracks misalignment and bearing wear on cooling fans and effluent pumps
- Mining/Heavy Industry: Utilized on ball mills, crushers, and compressors in harsh environments
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Initial Setup: Install the outer sleeve into the machine case. Carefully insert the probe assembly (containing the connector) and adjust the probe gap by turning the adjustment assembly until you register a nominal -10 VDC gap voltage at the center of the linear range using a digital voltmeter.
Depth Sizing: The "070" suffix specifies a probe penetration of 7.0 inches. The total adjustment range is ± 0.5 inches (± 13 mm).
Sleeve Constraint: If your standoff and penetration dimensions exceed 12 inches, you must use additional sleeve support near the probe to prevent resonance.
Alternative Names
21000-28-05-00-070-01-0Z
21000-28-05-00-070-01-O2
21000-28-05-00-070-0I-02
21000-28-05-00-070-O1-02
21000-28-05-00-07O-01-02
21000-28-05-00-O70-01-02
21000-28-05-OO-070-01-02
21000-28-O5-00-070-01-02
21000-Z8-05-00-070-01-02
2I000-28-05-00-070-01-02
21000 28 05 00 070 01 02
21000 28 05 00 070 01 0Z
21000 28 05 00 070 01 O2
21000 28 05 00 070 0I 02
21000 28 05 00 070 O1 02
21000 28 05 00 07O 01 02
2I000 28 05 00 070 01 02
21000-28-05-00-070-01-01
21000-28-05-00-070-01-04
21000-28-05-00-070-01-CN
Technical notes
The ordering format for 21000 is 21000-AA-BB-CC-DDD-EE-FF, where AA represents the probe option, BB represents the probe cable length, CC represents the sleeve length, DDD represents the probe penetration length, EE represents the fitting option, and FF represents the mounting thread option. For example, 21000-28-05-00-070-01-02 indicates a 3300XL 8mm reverse mount probe with 5-meter cable, 0.0-inch sleeve, 7.0-inch probe penetration, 1/2-inch NPT fitting, and 3/4-14 NPT mounting thread.
FAQs
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What is the 21000-28-05-00-070-01-02?
+The Bently Nevada 21000-28-05-00-070-01-02 is an API 670-compliant proximity probe housing assembly. -
Can this probe housing be calibrated while the turbomachinery is running?
+Yes. The Bently Nevada 21000 housing assembly enables safe probe distance (gap) calibration while machinery is online and running under full load. -
Is this assembly rated for hazardous locations?
+Yes. The housing assembly is fully compliant with the American Petroleum Institute (API) 670 Standard and features a [CSA Type 4 environmental enclosure rating](0.5.10, 0.5.17). It functions as an explosion-proof barrier for North American industrial zones, provided it is installed with the appropriate explosion-proof conduit fittings. -
What is the mechanical adjustment range for the probe depth?
+The 7.0-inch penetration sleeve features a fine mechanical adjustment range of ±0.5 inches (±13 mm). This lets you precision-tune the voltage gap between the probe tip and the target shaft without changing out any physical hardware.
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