• • Corrosion Resistance: Stainless steel construction ensures long-term durability in harsh and corrosive environments.

  • Explosion-Proof Design: CSA-approved for hazardous areas, providing safe operation in explosive atmospheres.

  • Sealed Protection: O-rings and threaded connections help prevent dust, moisture, and contaminants ingress.

  • High Temperature Tolerance: Suitable for demanding industrial conditions with stable thermal performance.

  • Weatherproof Enclosure: CSA Type 4 rating protects against water, dust, and outdoor exposure.

  • Industrial Reliability: Designed to maintain performance in oil & gas, power, and heavy-duty environments.

Specific Application

• External mounting and mechanical protection of proximity probes on heavy-duty industrial rotating machinery.
• Radial vibration and axial position measurement in harsh, corrosive chemical or marine process environments.
• Sensor installations in explosive gas or hazardous industrial zones requiring rugged Type 4 rated enclosures.

Ordering Information Summary

Base Model Structure

• 24701: Stainless steel proximity probe housing assembly base unit (303 stainless steel body with 304 stainless steel sleeve).

Suffix Option Breakdowns

• A: 34: Integrated 3300 XL 8mm probe equipped with a connector protector and multiple global hazardous area certification approvals.
• B: 05: Integrated probe leading cable length of 0.5 meters (20 inches).
• C: 00: No standoff adapter included in the structural layout.
• D: 030: Probe penetration length dimension configured at 3.0 inches (76.2 mm).
• E: 04: Enclosure supplied with one 3/4-14 NPT structural plug only.
• F: 02: Casing mounting thread engineered to a 3/4-14 NPT size specification.

Installation & Troubleshooting FAQ

Q1: What mechanical design parameters do the suffix codes "-00-030-04-02" outline?
A: The "-00" means no standoff adapter is used. The "-030" sets a probe penetration length of 3.0 inches (76.2 mm). The "-04" specifies a single 3/4-14 NPT conduit plug fitting. The "-02" defines a 3/4-14 NPT machine casing mounting thread option machined with extra full threads for added assembly stiffness.

Q2: Why must extra care be taken when probe penetration lengths are shorter than 2.0 inches?
A: When your specific mechanical casing constraints require probe penetration lengths between 1.0 and 2.0 inches, you may need to counterbore the machine case. If the counterbore diameter is too small or restricted, the probe head triggers a side-view or rear-view effect against the metallic walls, distorting the calibration curve.

Q3: When is an external sleeve support piece mandatory during the installation layout?
A: Sleeve support is strictly required if your total combined probe penetration length exceeds 12 inches (304 mm). Long, unbraced stainless steel probe sleeves will experience severe process vibrations or structural resonance in the field. Bently Nevada provides a specialized probe support and oil seal hardware kit to prevent signal dampening.

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: