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Technical specifications for 21000-28-05-00-021-03-02
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Estimated shipping dimensions:30.5x8.5x8.5cm
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Weight:1.05 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Probe with Connector:3300 XL 8mm probe, selectable hazardous area approvals
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Probe Cable Length:0.5 m (20 in)
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Standoff Adapter:No standoff adapter
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Probe Penetration:2.1 in (53 mm)
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Fittings: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
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Mounting Thread:3/4-14 NPT
Information
Overview
Manuals
Common Applications
Product Precautions
The 21000-28-05-00-021-03-02 is a highly compact, explosion-proof probe mounting housing assembly. Specifically designed for precision machinery with extremely limited installation space, its key feature is a "zero-length" body design (option 00), allowing the housing to be mounted flush against the unit surface. It boasts a short penetration depth of 2.1 inches (53 mm), perfectly accommodating 8 mm reverse-mount probes.
- An optional standoff adapter
- A reverse mount proximity probe
- Optional conduit fittings
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 21000-28-05-00-021-03-02 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.
Chemical Process Pumps
The housing is screwed directly onto the pump's bearing cover, and an 8 mm probe is installed inside to monitor the axial movement of the shaft.
Compact Industrial Motors
Installed on end caps at both ends of the motor, used to monitor the radial vibration of the rotor.
High-Speed Gearboxes
Technicians can adjust the probe gap from the outside through the housing and determine whether the gears are worn or the bearings are failing by monitoring voltage changes, without having to drain the gear oil.
Aerospace Test Cells
Installed on the housing of a high-speed turbopump or fuel regulator, it monitors the stability of the shaft at ultra-high speeds.
Municipal Water & Drainage
The sealed structure of the housing, combined with explosion-proof certification, effectively prevents moisture from penetrating into the sensor core, ensuring that the monitoring system does not give false alarms during critical moments in the flood season.
The "02" at the end of the model number indicates explosion-proof certification. Due to the short housing, the threaded stress area is relatively small. When installing "05" (3/4 NPT thread), rust on the machine opening must be thoroughly cleaned, and a conductive anti-seize compound must be used. This is not only for sealing but also to ensure electrical connection (grounding) between the probe housing and the machine housing, preventing static electricity buildup. Although it is explosion-proof and sealed, oil and condensation can easily accumulate because it is usually installed low and close to the machine body. The outgoing cable must have a downward curve (drip bend) to prevent liquid from directly pressing the seal along the hose.
FAQ View All FAQ
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What does the"00" indicates that the main body length of the casing is 0 inches.
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In model 21000-28-05-00-021-03-02, what are the mandatory requirements for the matching probe for theThe "28" designation indicates that the housing must be used with a 3300 XL 8 mm reverse mount probe.
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If 21000-28-05-00-021-03-02 is installed on an offshore unit with explosion-proof requirements, what protective function does the"02" indicates that the product has multiple explosion-proof certifications from North America (CSA) and internationally (ATEX/IECEx).
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In model 21000-28-05-00-021-03-02, is it necessary to wrap Teflon tape around the thread corresponding to optionFor the 3/4-14 NPT tapered pipe thread represented by "05", it is not recommended to use ordinary PTFE tape, especially in explosion-proof areas.
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If the 21000-28-05-00-021-03-02 cable is installed in a vertical position, how can I prevent moisture from entering the cable?During installation, technicians must connect an explosion-proof conduit or cable seal fitting that meets IP66/IP67 rating at the "03" interface.
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