Description

Engineered to provide physical and environmental protection for proximity probes, the Bently Nevada 21000-34-05-00-030-03-022 is a robust, external housing assembly designed for industrial machinery monitoring. This assembly facilitates the external mounting of proximity probes (such as 3300 or 3300 XL 8mm transducers) through machine casings, allowing for external adjustment, servicing, and replacement without requiring access to the internal machinery wet areas. The 21000 Series housing is built to withstand high-vibration environments, oil-rich atmospheres, and extreme temperatures typical of heavy industrial installations.

The configurator code 21000-34-05-00-030-03-022 defines the exact combination of probe cable fittings, conduit threads, mounting threads, sleeve lengths, and reverse-mount probe options required to interface with the target machine casing. Its primary function is to maintain environmental isolation while allowing precise mechanical positioning of the proximity sensor relative to the monitored shaft target.

Features

• Provides robust mechanical shielding for proximity probes against impact, oil, and atmospheric moisture.
• Features a dome-style explosion-proof junction cavity to protect cable connections and terminations.
• Facilitates external probe gap adjustment during machinery operation, minimizing downtime.
• High-integrity thread sealing options to maintain casing pressure boundaries and prevent oil migration.
• Constructed from heavy-duty, corrosion-resistant metals suitable for petrochemical and power generation environments.

Applications

• Steam turbine and gas turbine vibration monitoring systems.
• Centrifugal and reciprocating compressor shaft observation.
• Large industrial pumps, gearboxes, and generators.
• Hazardous area machinery installations requiring ATEX or Class I, Div 1 physical protection.

Technical Specifications

Installation Guidelines

• Ensure all process pressure is fully vented before installing or adjusting the housing assembly on the machine casing.
• Apply high-quality thread sealant to the mounting threads to prevent process fluid leaks.
• Verify that the O-ring is seated flush within its groove before securing the dome cover to maintain the environmental sealing integrity.
• Adjust probe spacing relative to the target shaft using a calibrated digital voltmeter connected to the proximity transducer driver/proximitor, monitoring DC voltage to verify the correct physical gap.