BENTLY 128276-011

Description

Detailed parameter table

BENTLY 163179-01

Product introduction

The 128276-011 from Bently Nevada is a precision eddy current proximity sensor probe assembly designed as a foundational measurement component in 3500 Machinery Protection Systems. This rugged sensor directly measures shaft vibration, position, and speed in rotating machinery, converting physical displacement into electrical signals that form the basis of machinery health monitoring. Bently Nevada’s 128276-011 serves as the critical first link in the measurement chain, capturing subtle machinery movements that indicate early-stage faults—data that, when transmitted via 163179-01 extension cables to processing modules, enables both protection and predictive maintenance programs.

Bently Nevada’s 128276-011 addresses the need for accurate, reliable non-contact measurement in harsh industrial environments where traditional sensors would fail. Its eddy current technology provides consistent performance across a wide temperature range, while its stainless steel construction withstands exposure to oils, chemicals, and physical abrasion. When paired with compatible signal input modules like the 136188-01, this sensor delivers the high-quality data visualized on 3500/60 displays, forming the foundation for informed operational decisions and machinery protection.

Core advantages and technical highlights

Precision measurement capability: The 128276-011 provides microsecond-level response to shaft movements within its 0-2 mm range, capturing vibration amplitudes as small as 0.1 μm. This precision ensures detection of early-stage bearing wear, misalignment, and imbalance that would go unnoticed by less sensitive sensors, enabling proactive maintenance before catastrophic failure.

Extreme environment durability: Constructed with a 316 stainless steel housing and high-temperature cabling, the sensor operates reliably from -55°C to +177°C. Its IP68 rating ensures protection against dust ingress and temporary submersion, making it suitable for installation in turbine enclosures, pump bearing housings, and other challenging locations where environmental conditions would degrade standard sensors.

Stable long-term performance: The sensor’s eddy current design maintains calibration stability over time, reducing the need for frequent recalibration. This stability is enhanced by temperature compensation circuitry that minimizes drift, ensuring measurement accuracy even as operating conditions fluctuate—a critical feature for reliable trend analysis in predictive maintenance programs.

Seamless system integration: Equipped with a micro-D connector specifically designed for compatibility with 163179-01 extension cables, the 128276-011 integrates seamlessly into 3500 system architectures. This optimized connection ensures signal integrity from sensor to 136188-01 input modules, preserving the measurement quality needed for accurate vibration analysis on 3500/60 displays.

Typical application scenarios

In power generation facilities, the 128276-011 is installed in turbine bearing housings to monitor rotor vibration and axial position. Mounted in proximity to rotating shafts, these sensors detect subtle movements that indicate bearing condition, shaft misalignment, or rotor imbalance. Connected via 163179-01 cables to 136188-01 modules, their measurements are processed and displayed on 3500/60 systems, enabling operators to monitor critical parameters during startup, load changes, and normal operation.

Oil and gas processing plants utilize the 128276-011 in compressor and pump monitoring systems, where they measure shaft vibration in high-pressure, high-temperature environments. The sensor’s chemical resistance withstands exposure to process fluids and lubricants, while its high-temperature rating accommodates the elevated ambient conditions common in compression stations. Data from these sensors helps identify issues like surge conditions and bearing degradation before they cause unplanned shutdowns.

Manufacturing facilities deploy the 128276-011 on motors, gearboxes, and rotating production equipment to monitor vibration and shaft position. Installed in production-critical machinery, these sensors provide continuous data on equipment health, with measurements transmitted through 163179-01 cables to centralized monitoring systems. The resulting data displayed on 3500/60 modules helps maintenance teams schedule repairs during planned downtime, maximizing production efficiency.

BENTLY 135489-03

Related model recommendations

163179-01 (Bently Nevada): Extension cable that connects 128276-011 to signal modules.

136188-01 (Bently Nevada): Signal input module that processes 128276-011 outputs.

3500/60 (Bently Nevada): Display module that visualizes data from 128276-011 sensors.

3500/05-01-02-00-00-01 (Bently Nevada): Power supply for systems incorporating 128276-011.

330130-080-00-00 (Bently Nevada): Calibration fixture for 128276-011 sensors.

128276-012 (Bently Nevada): 8 mm range variant of the 128276-011 sensor.

330180-90-05 (Bently Nevada): Complementary proximity sensor for extended monitoring points.

3500/20 (Bently Nevada): System rack housing electronics for 128276-011 monitoring systems.

Installation, calibration and maintenance instructions

Installation preparation: Before installing the 128276-011, verify the mounting location provides a clear 0.5 mm to 1.5 mm gap to the target shaft (400 series stainless steel recommended). Ensure the mounting surface is clean and flat to prevent vibration-induced measurement errors. Required tools include a non-magnetic feeler gauge, torque wrench, and calibration equipment. Inspect the sensor and cable for damage, particularly checking the connector pins and cable jacket.

Mounting procedure: Secure the 128276-011 in the mounting bracket using specified hardware, torquing to 1.5 Nm (13 in-lbs) to prevent loosening from vibration. Set the initial gap using non-magnetic feeler gauges, positioning the sensor tip parallel to the shaft surface within 0.5° to ensure measurement accuracy. Connect the sensor to the monitoring system using 163179-01 extension cables, ensuring proper alignment of the micro-D connector before mating.

Calibration process: After installation, calibrate the sensor using the 330130-080-00-00 fixture to verify linearity across the 0-2 mm range. Connect the sensor to a signal conditioner and apply known gap values, recording output voltages to confirm they fall within specified tolerances (typically ±5% of nominal). Document calibration results and store them with maintenance records for future reference.

Maintenance suggestions: Include the 128276-011 in semi-annual inspections, checking for physical damage, loose mounting hardware, and oil/carbon buildup on the sensor tip. Clean the sensor tip with a soft, lint-free cloth if contamination is visible—avoid abrasive materials that could damage the sensing surface. During scheduled shutdowns, recheck the gap setting and perform a simplified calibration using a feeler gauge and 3500/60 display readings. Replace sensors immediately if output signals show non-linear behavior or if physical damage to the tip or cable is 发现.

Service and guarantee commitment

Bently Nevada provides the 128276-011 with a 36-month warranty covering manufacturing defects and performance issues under normal operating conditions—the longest in its class for proximity sensors. Our technical support team offers expert guidance on proper installation, gap setting, and calibration procedures to ensure optimal performance with 163179-01 cables and 136188-01 signal modules.

We offer specialized training on eddy current sensor technology, installation best practices, and calibration procedures for maintenance teams working with the 128276-011. Beyond the warranty period, our service agreements include calibration verification, performance testing, and expedited replacement services to minimize downtime. Bently Nevada’s commitment to quality ensures the 128276-011 delivers reliable measurement data throughout its operational lifecycle, backed by our global network of service professionals and application engineers.