Product Overview
The Bently Nevada 21000-00-00-00-00--03-02 is a robust Proximity Probe Housing Assembly designed to protect and position reverse-mount proximity probes in demanding industrial environments. This housing assembly, part of the 21000 series, provides a sealed, explosion-proof enclosure for vibration monitoring on rotating machinery such as turbines, compressors, and pumps. With its aluminum body and 304 stainless steel sleeve, the 21000-00-00-00-00--03-02 delivers durability and corrosion resistance, ensuring long-term reliability in harsh conditions.
This specific configuration includes two plugs, one 3/4-14 NPT fitting, one 3/4-14 to 1/2-14 NPT stainless steel reducer, and a cable seal grip with grommets accommodating cable sizes of 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches. The probe option and cable are not required (suffix 00), and the standoff adapter is omitted (00). The probe penetration is set to 0.0 inches, and no fittings are included (00).
Technical Specifications
The following specifications are directly from the manufacturer's data for the 21000-00-00-00-00--03-02:
| Parameter |
Value |
| Model |
21000 Proximity Probe Housing Assemblies |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Weight |
1.1 kg (2.4 lb) typical, without fittings |
| Mounting Thread Option |
03: Two plugs, one 3/4-14 NPT fitting, one 3/4-14 to 1/2-14 NPT SST reducer, one cable seal grip with grommets for cable sizes: 1/8 to 3/16 inches, 1/4 to 5/16 inches, 5/16 to 3/8 inches |
| Mounting Thread Option (Standoff) |
02: 3/4-14 NPT (Required if ordering Standoff Adapter Option) |
| Probe Option |
00: Probe not required |
| Probe Cable Length |
00: Probe cable not required |
| Standoff Adapter |
No standoff adapter (00) |
| Probe Penetration |
00: 0.0 in |
| Fitting Option |
00: Without fittings |
These specifications ensure that the 21000-00-00-00-00--03-02 meets the exact requirements for your installation, providing a precise fit for your proximity probe system.
Compliance and Certifications
The 21000-00-00-00-00--03-02 housing assembly is certified by the Canadian Standards Association (CSA) for explosion-proof applications. It is rated for use in hazardous areas, including:
- North America: Class I Divisions 1 and 2 Groups C and D
- Class II Divisions 1 and 2 Groups E, F, and G
- Class III
- Enclosure Type 4
- T5 @ Ta = -50°C to +40°C
- T4 @ Ta = -50°C to +80°C
The circuit is non-incendive when connected per drawing 140979. Additionally, the housing complies with the RoHS Directive 2011/65/EU and meets the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings. This makes the 21000-00-00-00-00--03-02 a reliable choice for critical machinery protection in oil and gas, petrochemical, and power generation industries.
Installation and Setup
Proper installation of the 21000-00-00-00-00--03-02 ensures accurate vibration monitoring. Follow these guidelines:
- Verify the mounting thread option (03) matches your machine's port. The included 3/4-14 NPT fitting and reducer facilitate connection to standard ports.
- Ensure the cable seal grip is correctly assembled with the appropriate grommet for your cable diameter (1/8 to 3/16 inches, 1/4 to 5/16 inches, or 5/16 to 3/8 inches) to maintain an explosion-proof seal.
- Torque the dome cover and fittings to manufacturer specifications to prevent loosening from vibration.
- For hazardous area installations, follow the wiring diagram referenced in drawing 140979 to maintain non-incendive circuit integrity.
Always consult the Bently Nevada installation manual for detailed instructions specific to your machinery.
Maintenance and Reliability
The 21000-00-00-00-00--03-02 requires minimal maintenance due to its rugged construction. Inspect the housing periodically for signs of corrosion, damage, or loose fittings. Check the O-rings and thread seals for wear and replace them if necessary to preserve the explosion-proof rating. The aluminum body and stainless steel sleeve resist environmental degradation, ensuring long service life and reduced downtime.
Selection Guide
When ordering the Bently Nevada 21000-00-00-00-00--03-02, confirm the suffix codes match your requirements. This unit is configured without a probe or cable, and with no standoff adapter. If you need a different configuration, such as with a standoff adapter or a different fitting option, please specify the correct suffix codes. PLC Source PRO offers this product new and in original factory packing, backed by a 12-month warranty. For assistance in selecting the right housing assembly, contact our technical sales team.