• External Probe Mounting: Designed for externally mounting proximity probes on rotating machinery casings.

• Hazardous Area Installations: Suitable for Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G environments.

• API 670 Compliance: Fully compliant with API 670 Standard for externally mounted probe housings.

• Turbine and Compressor Monitoring: Used on gas turbines, steam turbines, and compressors requiring explosion-proof protection.

• Bearing Housing Monitoring: Accommodates long sleeves for probes passing through inner bearing housings with optional probe support.

Features

· Stainless Steel Durability: Constructed with a rugged 303 stainless steel main body and an ultra-tough 304 stainless steel probe sleeve to resist aggressive environmental corrosion.

· Explosion-Proof Design: Certified by the Canadian Standards Association (CSA) for industrial deployment inside Class I Division 1 hazardous areas when properly fitted.

· API 670 Compliance: Fully engineered to meet the American Petroleum Institute mechanical and structural guidelines for externally mounted machinery enclosures.

· Fluid & Ingress Sealing: Features a 3/4-14 NPT explosion-proof plug alongside a multi-grommet cable seal grip to arrest fluid transfer inside the conduit line.

System Compatibility & Alternative Models

System Compatibility: Fully compatible with Bently Nevada 3300 XL 8mm Proximitor Sensors (e.g., 330180), standard 3300 XL extension cables, 3500 series machinery protection racks, and system networks running certified CSA Type 4 enclosures.

Alternative Model: 21000-28-05-15-026-03-02

Key Differences: The 24701-28-05-15-026-03-02 utilizes a heavy 303 stainless steel body weighting 1.8 kg (4.1 lb) to withstand corrosive chemical washdowns or marine salt atmospheres. Conversely, the 21000-28-05-15-026-03-02 uses an anodized aluminum body weighing 1.1 kg (2.4 lb), which provides a lightweight installation footprint optimized for general industrial applications where harsh corrosive compounds are not present.

Installation & Troubleshooting FAQ

Q1: What physical adjustment range is available for tuning the probe penetration depth in the field?
A: The Option D probe penetration length has a mechanical adjustment range of ±13 mm (±0.5 inches) via its internal sleeves. To adjust, modify the sleeve thread depth within this limit to lock the probe tip at the midpoint of its linear range before securing the outer thread seals and locking mechanism

Q2: Why am I getting degraded or fluctuating voltage output readings under extremely cold winter conditions?
A: Exposing the 3300 XL 8mm probe to ambient conditions below -34°C (-30°F) can trigger premature failure of its internal pressure seals. Verify your environmental conditions; if temperatures drop beneath this parameter, you must insulate the dome housing or implement external enclosure heating to protect the structural integrity of the sensor tip.

Q3: How do I handle replacement if only the outer sleeve is damaged but the main 24701 body remains functional?
A: You do not need to replace the entire assembly. You can order an individual replacement probe sleeve under part number 44382-AAA. To find your exact AAA suffix value for this 8mm system, add the standoff option (15) to the penetration option (026) plus the standard spacing constant (045), which yields a replacement sleeve code of 086.