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The 21000, 24701, and 164818 Proximity Probe Housing Assemblies are available with Canadian StandardsAssociation (CSA) approvals. They are rated explosion prooffor hazardous areas.

You can order hazardous area approvedproximity probes with 21000 aluminum and 24701 stainless steel housings for intrinsicallysafe applications. Both housings are certifiedas CSA Type 4 enclosures and are fullycompliant with the American PetroleumInstitute's (APi) 670 Standard for externallymounted proximity probe housings.

The 164818 Compact Proximity Probe Housing isalso available for applications with spacerestrictions. Ceramic capped probes areavailable with the 164818 housing.

Sleeve length is determined by the location inwhich the probe and housing are installed. Theprobe lead must be longer than the sleeve.Sleeve lengths longer than 304 mm (12 inches)require additional sleeve support to reduce thevibration associated with unsupported longsleeve lengths.

Frequently Asked Questions

Q : What does the full model number 21000-28-05-00-105-04-026 represent?

A : It is a Bently Nevada aluminum proximity probe housing assembly pre-installed with a 3300 XL 8mm probe, featuring a 0.5m cable, 10.5-inch penetration depth, and 3/4-14 NPT mounting threads.

Q : What is the thread size for the conduit/wiring ports (-04)?

A : It comes with a 3/4-14 NPT conduit connection entry, pre-fitted with an explosion-proof plug.

Q : Can I change the 10.5-inch penetration depth (-105) after ordering?

A : No. The internal sleeve length is factory-cut to match the 10.5-inch specification. Altering it manually ruins the calibrated depth.

Q : What material is the 21000 housing body made of?

A : It is made of copper-free aluminum, which offers excellent corrosion resistance and explosion-proof durability.

Product Applications

Oil and Gas/Refineries: Used for monitoring shaft vibration and displacement in large centrifugal compressors, large pump sets, and compressor stations in natural gas pipelines.

Coal and Nuclear Power Plants: Primarily used in the bearing housings of steam turbine generator sets, large blowers, and feedwater pumps, in conjunction with the Bently Nevada 3500 system for asset protection.

Large Chemical Plants: Used for monitoring the explosion-proof condition of rotating equipment such as compressors for various hazardous gases and reactor agitator shafts.

Metallurgical and Steel Plants: Used for continuous vibration monitoring of heavy-duty equipment such as blast furnace blowers and large exhaust fans.