Description

The 21000-28-10-00-025-04-02 is a heavy-duty proximity probe housing assembly engineered by Bently Nevada to protect and securely mount proximity probes on industrial machinery casings. This specialized housing acts as an environmental barrier and mechanical alignment guide for non-contacting displacement and vibration sensors. It is configured to accommodate a 3300 XL 8 mm proximity probe and features multiple hazardous area approvals, making it highly suitable for demanding industrial environments.

Constructed with a durable aluminum body and a high-strength 304 stainless steel sleeve, the assembly provides superior resistance to mechanical impacts and atmospheric corrosion. This specific model features a 2.5-inch probe penetration depth without a standoff adapter, standard 3/4-14 NPT process mounting threads, and a 1.0-meter probe cable path. Note that in current plant designs and updates, this configuration has been transitioned to the updated model reference 21000-16-10-00-025-04-02.

Features

• Compatible with Bently Nevada 3300 XL 8 mm proximity probes featuring multiple global safety approvals.
• Rugged construction combining a lightweight aluminum main body with a durable 304 stainless steel sleeve.
• Direct-penetration design (no standoff adapter required) configured for a precise 2.5-inch insertion depth.
• Includes one 3/4-14 NPT plug fitting to seal unused ports and protect internal electrical connections.
• Ensures stable and secure probe alignment for high-accuracy shaft vibration and position monitoring.

Applications

• Steam, gas, and hydro turbine shaft vibration monitoring.
• Industrial compressor and gearbox casing installations.
• Large-scale water pumps and process machinery protection.
• Hazardous-area rotating machinery setups requiring certified probe enclosures.

Technical Specifications

Installation Guidelines

• Thread Preparation: Inspect the 3/4-14 NPT process connection threads on both the machine casing and the housing before installation. Apply an approved industrial thread sealant to prevent process media leakage.
• Depth Verification: Ensure the 2.5-inch penetration depth matches the target spacing specifications of your probe and target shaft prior to torquing down the assembly.
• Sleeve Protection: Handle the 304 stainless steel sleeve with care during insertion to avoid bending or scratching the internal guide rails, which could impede correct probe alignment.
• Sealing: Properly tighten the supplied 3/4-14 NPT plug to guarantee moisture-tight integrity inside the junction area.