Bently Nevada 174985-00-12-90 25mm Underwater Probe

Product Introduction & Global PLC Spare HUB's Insight

Engineers deploy the Bently Nevada 3300 XL 25mm Underwater Proximity Probe for precision vibration monitoring. Global PLC Spare HUB experts frequently recommend this hardware for submerged industrial assets. For example, a refinery plant utilized the 174985-00-12-90 sensor inside a liquid-filled containment sump. The unit delivered stable vibration data without signal degradation. Our team tests every module rigorously before dispatch.

Technical Specifications

Installation Guide

• Mount the sensor inside fully submerged or fluid-exposed machinery locations.
• Keep the connector end dry because it lacks liquid seals.
• Avoid salt-water deployments since the 304 Stainless Steel case lacks saltwater corrosion resistance.
• Secure the unthreaded length properly matching the 0.0 inch configuration.
• Maintain the overall case length at 1.2 inches during mechanical fitting.
• Route the 9.0-meter total cable length away from high-voltage interference lines.

Commissioning & Maintenance Convenience

• Technicians verify gap voltage immediately using a standard digital multimeter.
• Diagnostic routines confirm zero drift during initial startup phases.
• Modular cabling allows rapid sensor replacement during scheduled plant turnarounds.
• Routine visual checks ensure Tefzel tubing remains free from mechanical abrasion.

Compatibility & Environmental Limits

• Compatible exclusively with 3300 XL 25mm extension cables and proximitor monitors.
• Withstands extreme thermal shifts from -60 degrees F to +351 degrees F.
• Withstands aggressive industrial fluid exposure safely.

Certification Information

• Intrinsic Safety: ia Class I, Zone 0: AEx/Ex ia IIC T5 through T1 Ga.
• Class Divisions: Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III.
• Non-Incendive: nA, ec Class I, Zone 2: AEx/Ex nA IIC T5 through T1 Gc.
• Barrier Requirement: Install with intrinsically safe zener barriers per drawing 141092 or galvanic isolators.

Package Contents & Warranty

• Includes one 174985-00-12-90 proximity probe unit in factory-sealed packaging.
• Includes a comprehensive 12-month operational warranty covering manufacturing defects.
• Dispatches globally within 24 to 48 hours via FedEx, UPS, or DHL.

Typical Application Scenarios & Diagnostic Capabilities

• Monitors radial vibration on submerged industrial pumps and hydraulic turbines.
• Tracks axial position inside fluid-filled lubrication reservoirs.
• Detects early-stage mechanical looseness and shaft imbalance under high-pressure liquid environments.

Expert FAQ & Selection Guide

Q: Can I submerge the entire 174985-00-12-90 assembly in water?

A: No. The probe body and Tefzel tubing withstand total submersion, but the connector end lacks fluid seals and must remain completely dry.

Q: Is this sensor suitable for marine saltwater environments?

A: No. The 304 Stainless Steel probe case does not tolerate corrosive salt-water solutions.

Q: How do engineers select the correct unthreaded length option?

A: Measure the mounting port clearance and order in 0.1-inch increments between 0.0 and 8.9 inches.