General Information

Core Description

The CA21000-34-05-00-040-03-02 is a Bently Nevada explosion-proof aluminum probe housing assembly featuring an integrated 3300 XL 8mm proximity probe with a 0.5-meter cable and connector protector. Fully compliant with API 670 standards, this CSA Type 4 rated all-metal housing works seamlessly on industrial machinery to deliver secure external probe access, fast gap adjustments, and stable mechanical transducer protection in hazardous areas.

Installation & Wiring

• Mechanical Housing Mount: Thread the lower 3/4-14 NPT mounting adapter end of the housing directly into the pre-tapped casing or bracket assembly. Securely lock the orientation to allow adequate conduit path access.
• Sleeve and Probe Insertion: Insert the 4.0-inch stainless steel sleeve through the NPT mounting base to position the reverse-mount probe head into the machinery housing boundary. Ensure the probe face maintains clearance from internal obstacles.
• ClickLoc Cable Connection: Route the 0.5-meter leading cable through the body and attach it to your 3300 XL extension cable. Snap the factory connector protector over the gold-plated coax connection to lock out oil and dampness.
• Conduit and Wire Termination: Guide the extension cable out through the threaded ports for conduit connections. Run the lines into a localized terminal housing or junction layout, ensuring the outer shield is tied down cleanly.

System Compatibility and Replacement Models

System Compatibility:

• Bently Nevada 3300 XL 8 mm Proximity Transducer System components, including standard extension cables and Proximitor blocks.
• Industrial plant machinery casings and bracket targets tapped for a standard 3/4-14 NPT mounting thread profile.
• Asset condition protection networks accepting standard analog proximity inputs, such as Bently Nevada 3500 series racks.

Alternative Replacement Models:

• 21000-34-05-00-040-03-02 (Standard aluminum housing version with identical mechanical reach but completely lacking explosion-proof certificates).
• CA24701-34-05-00-040-03-02 (Heavy-duty alternative version utilizing a full 303 stainless steel body structure instead of cast aluminum).
• Standalone 330105-02-12-05-02-05 reverse-mount proximity probe paired with an individual 44382-085 replacement sleeve.

Differences from Alternative Models:

• Hazardous Certification Profile: The prefix CA designates an officially certified CSA explosion-proof rated housing. The base 21000 model shares identical dimensions but is restricted to non-hazardous or intrinsically safe zones using external safety barriers.
• Housing Base Metallurgy Mass: The CA21000 model utilizes a cast copper-free aluminum body weighing 1.1 kg, which simplifies handling. The CA24701 alternative line relies on a solid 303 stainless steel body weighing 1.8 kg, optimizing longevity against high-salinity corrosion on marine platforms.
• Sleeve Structural Resonance Parameters: This module carries a 4.0-inch sleeve penetration (-040) with zero standoff layout (-00). It does not exceed the critical 300 mm (12 inches) threshold, bypassing the strict structural mandate for secondary internal support brackets (P/N 37948-01) required to prevent long-sleeve mechanical resonance.

Ordering Information Table

Installation & Troubleshooting FAQ

Q1: How do I adjust the proximity probe gap when utilizing this external housing assembly?

A: Unscrew the threaded aluminum dome cover to expose the rear of the reverse-mount probe lead. Loosen the sleeve locknut, hook up a digital multimeter to your Proximitor’s OUT and COM terminals, and turn the main sleeve body to adjust the physical gap distance. For a standard 3300 XL 8mm system, rotate the sleeve until your multimeter reads a baseline voltage of -10.0 VDC (corresponding to the midpoint of the 2.0 mm linear range), then tighten the locknut to 11.2 N·m (100 in·lbf).

Q2: Why is the transducer signal registering high-frequency electrical noise or an unbalance glitch?

A: This configuration implements a short 4.0-inch sleeve penetration length. If the stainless steel sleeve or probe head is positioned too close to internal casing bracket walls or counterbore steps, it triggers a Side View Effect where the sensor's high-frequency RF field cross-talks with adjacent metal. Ensure that any machine casing counterbore hole diameter measures at least three times the probe tip diameter (minimum 24mm for an 8mm probe head) to eliminate physical signal dampening.

Q3: Lube oil is leaking into the external conduit lines from the housing. How can this be corrected?

A: This indicates that the internal environmental seals or thread seals have worn out or were pinched during field installation. Check the condition of the internal Viton O-rings inside the housing body assembly and ensure the outer 3/4-14 NPT pipe threads are wrapped with fresh PTFE sealant tape. If your machine runs a high oil washdown pattern, verify that the Option E:03 cable seal grip grommet is tightly compressed around the extension cable jacket to block escaping fluid migration.

Accessories

Individual Probe Sleeve for 21000/24701 Proximity Probe Housings

44382-AAA

The individual probe sleeve length does not include the distance from the end of the sleeve to the probe tip or the gap from the probe tip to the target material. If only the part number of the original housing is known, and the sleeve cannot be measured, use the following table to determine the sleeve length: