Bently Nevada 174985-00-12-90 Underwater Sensor Guide

Ordering Architecture and Part Structure

The Bently Nevada 174985-00-12-90 eddy current sensor delivers high-precision displacement tracking inside harsh liquid environments.

• Manufacturer Lineage: Engineered and built by Bently Nevada using high-grade industrial production standards
• Product Series Line: Advanced heavy-duty probe belonging to the renowned 3300 XL 25mm proximity sensing family
• Part Number Code Structure:
  • └── 174985: Base model number for 25mm underwater probe with 1.25-12 UNF threads and Tefzel tubing
  • └── -00: Unthreaded case length option representing 0.0 inches (0.0 mm) body section
  • └── -12: Overall stainless steel case length option representing 1.2 inches total body length
  • └── -90: Total system cable length option representing 9.0 meters (29.5 feet) cable extension
• Target Installation Environment: Measures dynamic shaft vibration and axial posture on large industrial machines operating completely submerged

Core Features and Key Product Advantages

Engineering teams design this specialized 3300 XL probe to withstand severe fluid exposure without losing operational accuracy.

• Rugged Pressure Sealing: Withstands extreme liquid static pressure up to 34 Bar (500 psi) Nitrogen seal rating
• Tefzel Tubing Protection: Encapsulates internal probe wiring within durable Tefzel outer tubing to block fluid ingress
• Large Tip Diameter: Utilizes an expanded 25mm sensor head to provide broad linear range across large shafts
• Hazardous Area Ratings: Holds global intrinsically safe approvals for safe deployment across Zone 0 and Zone 2 areas

Detailed Technical Specifications

We provide verified engineering metrics to ensure seamless replacement integration into your current plant monitoring systems.

• Manufacturer & Model Number: Bently Nevada System Unit 174985-00-12-90
• Linear Measurement Range: Delivers wide 12.7 mm (500 mils) measurement span for extended displacement monitoring capability
• Incremental Scale Factor: Standardized output sensitivity delivers 0.787 V/mm (20 mV/mil) precise voltage signal response
• Frequency Response Range: Measures dynamic shaft movement accurately from 0 Hz (DC) up to 2.0 kHz response limit
• Linearity Deviation (DSL): Maintains straight-line scale deviation well within ±0.075 mm (±3.0 mil) standard accuracy limits
• Operating Temperature Limits: Operates continuously inside extreme thermal process conditions ranging from -51°C to +177°C (-60°F to +351°F)
• Structural Casing Alloy: Machined using 304 stainless steel housing to deliver high mechanical strength under pressure
• Electromagnetic Shield Immunity: Built-in coaxial shield configuration rejects strong industrial motor field and high-voltage line interference

Installation Guidelines and Mechanical Setup

Following proper physical mounting techniques ensures accurate signal capture and protects submerged rotating machinery from damage.

• Thread Mounting Mechanics: Mount the stainless body securely into tapped holes using standard 1.25-12 UNF external mounting threads
• Dry Connector Zone: Keep the distant cable connector end completely dry because only the probe body resists submersion
• Fluid Restrictions: Avoid installing this 304 stainless steel probe in salt-water or marine environments to prevent corrosion

Shipment Details and Global Logistics Support

Our logistics team safely packs industrial monitoring components to ensure quick global dispatch to your facility.

• Package Contents List: Box contains one factory-new 3300 XL 25mm underwater proximity probe unit
• Protective Equipment Packaging: Includes heavy anti-static wrapping and protective end caps for physical connector protection
• Worldwide Shipping Express: We offer global fast delivery using trusted courier partners like FedEx, UPS, and DHL
• Comprehensive Warranty Coverage: Includes full 12-month quality warranty coverage starting from your official shipment delivery date

Frequently Asked Questions

Review relevant technical queries regarding liquid submersion, thread specs, and pressure ratings.

• Can I submerge the entire probe and cable? You can submerge the probe body and Tefzel tubing, but you must keep the connector end dry.
• Is this probe suitable for ocean water monitoring? No, 304 stainless steel housing degrades quickly inside salt-water and requires specialized alloys instead.
• What static pressure rating does the seal support? The sealed probe body holds standard Nitrogen fluid pressure ratings up to 34 Bar (500 psi).
• What scale factor does this 25mm probe deliver? The 25mm sensor tip outputs 0.787 V/mm (20 mV/mil) sensitivity across its full 500 mil linear range.
• Does this unit hold hazardous area certifications? Yes, it holds Class I Zone 0 and Zone 2 intrinsically safe approvals for dangerous gas areas.

Executive Product Summary

The Bently Nevada 174985-00-12-90 underwater proximity probe delivers unmatched displacement measurement performance for fully submerged machinery. Featuring 34 Bar pressure sealing, protective Tefzel tubing, and hazardous location approvals, this unit ensures reliable long-term equipment protection under demanding fluid immersion conditions.

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