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Bently Nevada 21000-00-00-40-040-02-02
Bently Nevada 21000-00-00-40-040-02-02
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Proximity Probe Housing Assemblies

21000-00-00-40-040-02-02

Spare Part Number

PN21000-00-00-40-040-02-02

Product Information:

The 21000-00-00-40-040-02-02 is an industrial-grade external eddy current probe housing assembly from the Bently Nevada 21000 series. As a core mechanical protection component in rotating machinery condition monitoring systems, it is designed to provide high-strength environmental sealing and physical protection for internal non-contact displacement probes located outside equipment such as steam turbines, industrial compressors, large fans, and pump sets.

The assembly's unique design allows maintenance personnel to safely and accurately adjust the internal probe's measurement gap directly from outside the machine without disassembling the bearing housing or stopping machine operation. It is a critical mechanical component in heavy industrial asset protection and predictive maintenance systems. Core hardware and customized parameter analysis: The assembly body is made of lightweight A356.0 cast aluminum, and the internal probe sheath is made of 304 stainless steel, offering excellent impact resistance, dust resistance, and resistance to industrial chemical corrosion.

Based on its highly customized long suffix parameter code, the hardware configuration of this model is as follows: The first two options are 00-00, indicating that the component is shipped without an internal probe and coaxial cable, and is an empty shell component, allowing users to flexibly assemble existing 3300 XL 8mm or 5mm probes in the field; Option 40 indicates that it is equipped with a stainless steel armored conduit to enhance protection against mechanical damage to external cables; the conduit penetrates the machine to a depth of 4.0 inches, approximately 102 mm (Option 040); the conduit fitting contains only one 3/4-14 NPT plug (Option 02); the entire component is securely screwed into the measuring point hole of the machine bearing housing using 3/4-14 NPT industry standard threads (Option 02).

Product image is representative; revision or series may vary. Contact us to request a specific version.
  • One-year warranty
  • Global shipping
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Technical specifications for

21000-00-00-40-040-02-02

0 TECHNICAL PARAMETERS
  • Manufacturer:
    Bently Nevada
  • Product Category:
    Sensor
  • Spare Part Number:
    21000-00-00-40-040-02-02
  • Estimated shipping dimensions:
    14.2 x 20 x 1.5 cm
  • Weight:
    0.12 kg
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
  • Product Type:
    Proximity Probe Housing Assemblies
  • Category Series:
    21000, 24701, and 164818 Proximity Probe Housing Assemblies
  • Probe with Connector:
    Probe cable not required
  • Probe Cable Length:
    Probe cable not required
  • Standoff Adapter (Option C Dimension):
    4.0 in (101.6 mm)
  • Probe Penetration (Option D Dimension):
    4.0 in (101.6 mm)
  • Fittings:
    Two 3/4-14 NPT explosion-proof fittings
  • Mounting Thread:
    3/4-14 NPT
  • Operating and storage:
    -51°C to +177°C (-60°F to +351°F)
  • Material:
    Aluminum body with 304 stainless steel sleeve
  • Series:
    3300 System
  • Stock:
    100
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  • 01

    Factory Sealed

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  • 02

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  • 03

    Factory New

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Alternative Names

210000000400400202 21000 00 00 40 040 02 02 2I000-00-00-40-040-02-02 21OOO-OO-OO-4O-O4O-O2-O2 21000-00-00-A0-0A0-02-02 21000-00-00-40-040-02-01 21000-00-00-40-040-02-04 21000-00-00-40-040-02-CN 21000-00-00-40-040-02-BR 21000-00-00-40-040-02-RU 21000-00-00-40-040-02-US 21OOO-OO-OO-4O-O4O-O2-O4 2I000-00-00-40-040-02-0I

Information

Overview Manuals General Info Module Components Standard Application

Features:

  • Proximity Probe Housing Assemblies
  • Aluminum body with 304 stainless steel sleeve
  • 21000, 24701, and 164818 Proximity Probe Housing Assemblies
The 21000 and 24701 Proximity Probe Housing Assemblies are available with Canadian Standards Association (CSA) approvals. They are rated explosion proof for hazardous areas. Bently Nevada offers a probe support and oil seal (part number 37948-01) for long sleeves that must go through an inner bearing housing.

To externally mount proximity probes, use one of these allmetal Proximity Probe Housing Assemblies: 21000 aluminum probe housing assembly; 24701 stainless steel probe housing assembly The 21000 and 24701 Proximity Probe Housing Assemblies consist of the following parts:A dome cover that screws into the body of the housing; Threaded ports for conduit connections; A probe sleeve of optional length; 0-rings; A reverse mount proximity probe; A thread seal; Optional conduit fittings; An optional standoff adapter.

The 21000-00-00-40-040-02-02 Bently Nevada Proximity Probe Housing Assemblies may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 21000-00-00-40-040-02-02 Proximity Probe Housing Assemblies 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.
  • Model: 21000-00-00-40-040-02-02
  • Warranty: One-year warranty
  • Condition: Brand new, original, in stock
  • Product Family: 21000, 24701, and 164818 Proximity Probe Housing Assemblies
Proximity Probe Housing Assemblies
21000-Axx-Bxx-Cxx-Dxxx-Exx-Fxx

A: Probe with Connector
00: Probe not required
14: 420 nuclear
16: 3300 XL 8mm probe
26: 3300 XL NSv probe
27: 3300 XL NSv probe, selectable hazardous area approvals
28: 3300 XL 8mm probe, selectable hazardous area approvals
29: 3300 XL 11mm probe
30: 3300 XL 11mm probe, selectable hazardous area approvals
31: 3300 XL NSv probe with connector protector
32: 3300 XL NSv probe with connector protector, selectable hazardous area approvals
33: 3300 XL 8mm probe with connector protector
34: 3300 XL 8mm probe with connector protector, selectable hazardous area approvals
35: 3300 XL 11mm probe with connector protector
36: 3300 XL 11mm probe with connector protector, selectable hazardous area approvals
37: 3300 XL 8mm probe, ETR, selectable hazardous area approvals (available for 21000 only)
 
B: Probe Cable Length
00: Probe cable not required
05: 0.5 m (20 in)
10: 1.0 m (39 in)
12: 12.0 in
18: 18.0 in
24: 24.0 in
30: 30.0 in
36: 36.0 in
 
C: Standoff Adapter (Option C Dimension)
15: Minimum length 1.5 in (38 mm)
75: Maximum length 7.5 in (191 mm)
Examples
1.5 in (38 mm) = 15
No standoff adapter = 00
 
D: Probe Penetration (Option D Dimension)
10: Minimum length 1.0 in (25.4 mm)
Examples
3.7 in (94 mm) = 037
22.4 in (569 mm) = 224
 
E: Fittings
00: Without fittings
01: One 3/4-14 NPT explosion-proof fitting; One 3/4-14 NPT plug
02: Two 3/4-14 NPT explosion-proof fittings
03:One 3/4-14 NPT plug; One 3/4-14 to 1/2-14 NPT reducer; One cable seal grip with grommets for; the following cable sizes:
• 1/8 to 3/16 inches
• 1/4 to 5/16 inches
• 5/16 to 3/8 inches
04: One 3/4-14 NPT plug only
 
F: Mounting Thread
01: As cast without threads
02: 3/4-14 NPT
04: 1/2-14 BSP
In the overall safety monitoring and system integration architecture, this protective housing assembly, when properly assembled with the field probes, provides all-weather environmental protection. Its housing meets CSA Class 4 standards for splash, dust, and explosion protection (weatherproof housing), and its structural design fully complies with the stringent technical specifications of the American Petroleum Institute (API) 670 mechanical monitoring hardware standard.
 
A coaxial cable securely connects from the protective housing to the field preamplifier, ultimately transmitting the linear voltage signal to the Bently Nevada 3500 mechanical protection system.
 
This system is widely used in harsh heavy industrial environments such as oil and gas plants, large chemical plants, and power plants. These environments are characterized by high temperatures, high oil content, and the presence of flammable and explosive substances, thus ensuring the absolute stability and safety of the underlying physical monitoring signals.

Technical notes

The 21000-00-00-40-040-02-02 is a proximity probe housing assembly from the Bently Nevada 21000 series. Its body is constructed of aluminum alloy (with a 304 stainless steel sheath), and the overall design fully complies with API 670 standards, offering CSA Type 4 industrial protection. A key technical feature of this model is its flexible and customizable "explosion-proof housing" configuration, excluding probe hardware. The probe selection is without the eddy current probe (-00) and probe cable (-00), but includes a 4.0-inch (approximately 101.6 mm) bracket adapter (-40) to prevent external obstructions from the machine housing. The stainless steel sheath provides a 4.0-inch (approximately 101.6 mm) probe penetration depth (-040), and the electrical interface accessories are configured with two explosion-proof connectors (-02). The entire unit is secured to the machine housing via a 3/4-14 NPT thread (-02) on the bottom. This design provides robust and reliable physical protection for reverse-mounted eddy current probes in industrial environments, including dustproof, waterproof, and dual explosion-proof protection, facilitating flexible selection and replacement in the field.
PRODUCT & ORDER FAQS

Questions buyers ask about 21000-00-00-40-040-02-02

  • What are the main measurement functions of the 21000-00-00-40-040-02-02 probe in a precision machinery protection system?

    The 21000-00-00-40-040-02-02 is a high-performance eddy current proximity probe designed for non-contact measurement of shaft vibration, radial displacement, axial position, shaft runout, and rotor dynamic motion. The 21000-00-00-40-040-02-02 provides continuous, high-resolution monitoring of critical rotating equipment used in industrial process applications.
  • What are the characteristics of the probe size and cable configuration of the 21000-00-00-40-040-02-02?

    The 21000-00-00-40-040-02-02 model is equipped with a 4 mm diameter probe and integrates a 4.0-meter (approximately 13.1-foot) long low-capacitance coaxial cable. This configuration optimizes electrical performance while maintaining the characteristics of the factory-calibrated sensor, ensuring reliable signal transmission and flexible installation.
  • How does the 21000-00-00-40-040-02-02 model achieve superior metrological accuracy?

    The 21000-00-00-40-040-02-02 model employs precision eddy current sensing technology, a factory-calibrated probe coil, and optimized electromagnetic circuitry. These design features ensure excellent linearity, minimal thermal drift, superior repeatability, and stable displacement measurement within the specified operating range.
  • What is the calibration output sensitivity of the 21000-00-00-40-040-02-02?

    When used with compatible signal conditioners and monitoring systems, the 21000-00-00-40-040-02-02 typically provides a calibration system sensitivity of 200 mV/mil (7.87 V/mm). This high sensitivity enables precise monitoring of minute shaft displacements, amplitudes, and rotor movements.
  • Which industrial applications are best suited for the 21000-00-00-40-040-02-02?

    The 21000-00-00-40-040-02-02 is widely used in equipment such as steam turbines, gas turbines, centrifugal compressors, generators, electric motors, pumps, industrial fans, expanders, and gearboxes, where continuous shaft displacement and vibration monitoring is crucial for the protection and operational reliability of the machinery.
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  • Product Lifecycle Stage

    Obsolete/Discontinued by OEM

    The recommended replacement is the Bently Nevada 3300 XL 8 mm proximity sensor system, which offers higher measurement accuracy, greater environmental adaptability, and longer-term manufacturer support. Moore Automated offers high-quality Bently Nevada replacement modules and spare parts, including compatible 3300 XL 8mm proximity sensor system components for legacy equipment. Our reliable solutions help minimize unplanned downtime, extend equipment life, and ensure the continuous operation of critical rotating machinery.
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Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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