Product Overview

The Bently Nevada 173687-01-50-12-05 belongs to the prestigious 3300 XL 11mm Proximity Transducer System, specifically engineered for applications requiring a larger linear range than standard 8mm probes. This high-precision sensor monitors critical parameters such as radial vibration and axial position on large-scale rotating machinery including steam turbines and heavy-duty compressors. Its robust design allows for a 4.0 mm (160 mil) linear range, providing superior data resolution in environments where shaft movement exceeds standard tolerances. By delivering an accurate, non-contacting signal to the 3500 series monitoring rack, this sensor serves as a vital component in preventing mechanical failure and ensuring the operational integrity of high-value industrial assets.

Suffix Logic and Hardware Configuration

The 173687 series utilizes a comprehensive suffix system to define the mechanical footprint and hazardous area compliance of the 11mm probe.

01 (Unthreaded Length Option)

This suffix designates a 10 mm unthreaded portion of the probe case. This configuration allows for precise mounting within custom brackets or housings where a specific insertion depth is required.

50 (Overall Case Length Option)

The 50 suffix specifies an overall case length of 50 mm. This standardized metric length ensures compatibility with most industrial mounting interfaces and probe housing assemblies.

12 (Total Length Option)

This indicates a 1.0-meter (3.3 feet) total cable length. For accurate system calibration, this must match the Proximitor Sensor’s requirements to maintain the standard 3.94 V/mm (100 mV/mil) scale factor associated with 11mm systems.

05 (Agency Approval Option)

The 05 designation provides multiple international approvals, including ATEX, IECEx, and CSA certifications. This ensures the probe is qualified for installation in intrinsically safe and hazardous environments globally.

Precision Operating Parameters

Deployment and Calibration Best Practices

Correct mechanical gapping is fundamental to the performance of the 173687-01-50-12-05. Engineers should use a digital multimeter to verify the DC Gap Voltage during installation. For 11mm systems, the probe is typically gapped to -10.0 VDC at the center of the 160-mil linear range.

Maintain a minimum cable bend radius of 25.4 mm (1 inch) to prevent internal coaxial damage. When routing the probe cable through conduit, ensure the conduit is free of sharp edges and high-voltage interference. We strongly recommend using the Bently Nevada 3300 XL connector protector kit if the coaxial connection is exposed to high humidity or lubricating fluids to prevent signal attenuation or ground loops.

Advanced Machinery Protection Integration

The 173687-01-50-12-05 integrates seamlessly with Turbine Supervisory Instrumentation (TSI) and plant-wide DCS platforms like Honeywell Experion PKS. Its Ryton® tip and 316 stainless steel body offer exceptional resistance to corrosive environments and high-pressure lubricants. The 11mm technology provides a wider linear range than 8mm counterparts, making it the ideal choice for larger machines where thermal expansion or significant shaft movement is expected. This stability is critical for the logic of Emergency Shutdown Systems (ESD), providing the reliable data needed to distinguish between actual mechanical faults and environmental noise.

Fulfillment and Logistics

Delivery time: 3-5 days when payment finish, BY DHL/FEDEX/UPS.

Every 173687nd sensor is shipped in original Bently Nevada anti-static industrial packaging, ensuring the sealed unit arrives in factory-calibrated condition, ready for immediate field commissioning.

Maintenance and Application FAQ

Q1: How does the 11mm probe's scale factor differ from the 8mm system?

A1: The 11mm system uses a scale factor of 100 mV/mil (3.94 V/mm), which is half the sensitivity of the 8mm system (200 mV/mil). This allows for a much larger linear measuring range (160 mils vs 80 mils).

Q2: Can I use this probe with a 5-meter 3300 XL Proximitor?

A2: No. This probe has a 1.0-meter total length and must be paired with a 3300 XL 11mm Proximitor and extension cable that together total the system's calibrated length, typically 5.0 or 9.0 meters.

Q3: What should I check if the monitor shows a "Not OK" status?

A3: First, verify the DC Gap Voltage. If it is outside the range of -2 VDC to -18 VDC, the probe may be physically damaged or improperly gapped. Also, check the coaxial connectors for moisture or physical contamination.

Q4: Is a special target material required for the 173687-01-50-12-05?

A4: Like most Bently Nevada proximity systems, it is factory-calibrated for AISI 4140 steel. Using other materials will require a custom calibration or a scale factor adjustment in the monitoring software.