330105-02-12-05-02-05 BENTLY Programmable controller

Bently Nevada Non-Contact Eddy Current Probes Overview

Bently Nevada (now part of Baker Hughes) non-contact eddy current probes are sensors used to measure the displacement, vibration, and velocity of rotating machinery shafts. They operate on the principle of eddy currents and do not require direct contact with the measured shaft, resulting in high reliability and long service life. These probes are critical components of rotating machinery protection and condition monitoring systems.

Product Detailed Description

• Function:

• Precisely measures radial vibration, axial position (thrust position), keyphasor, and speed (with a keyphasor probe) of rotating machinery shafts.

• Provides a voltage signal output proportional to the distance from the shaft surface.

• Used in conjunction with Bently Nevada monitoring instruments to form a complete vibration monitoring and protection system.

• Features:

• Non-contact measurement, avoiding mechanical wear.

• High accuracy and high resolution.

• Wide frequency response range.

• Rugged and durable design suitable for harsh industrial environments.

• Variety of sizes and configurations to accommodate different shaft diameters and installation requirements.

• Requires the use of extension cables and monitors/signal conditioners.

Product Parameters

As Bently Nevada offers various models of eddy current probes, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Probe Diameter:

• 5 mm, 8 mm, 11 mm, 14 mm, 25 mm, etc.

• Measurement Range (Linear Range):

• Varies depending on the probe diameter, e.g., typically 2 mm for an 8 mm probe.

• Output Sensitivity:

• Typically expressed in mV/mil or mV/µm, e.g., 200 mV/mil or 7.87 mV/µm for an 8 mm probe.

• Frequency Response:

• Typically 0 Hz to 10 kHz or higher (depending on the model).

• Supply Voltage:

• Typically -18 V DC to -24 V DC.

• Current Consumption:

• Typically a few milliamperes.

• Ambient Temperature:

• Operating temperature range typically -51 °C to +177 °C (depending on the model).

• Cable Length:

• Requires the use of extension cables, standard lengths are typically 1 meter, 5 meters, or 9 meters.

• Housing Material:

• Stainless steel or other corrosion-resistant materials.

• Thread Size (Mounting):

• Varies depending on the probe diameter.

Product Advantages

• High Reliability:

• Non-contact measurement, no mechanical wear, long service life.

• Precise Measurement:

• Provides accurate measurement of shaft displacement and vibration.

• Fast Response:

• Wide frequency response allows for capturing rapidly changing vibration signals.

• Suitable for Harsh Environments:

• Rugged design allows operation in high temperatures, high humidity, and oily environments.

• Comprehensive Monitoring Capabilities:

• Can be used for radial vibration, axial position, keyphasor, and speed measurement, providing comprehensive mechanical condition information.

• Integration with Bently Nevada Systems:

• Seamless integration with Bently Nevada monitoring instruments and software to form a powerful condition monitoring and protection solution.

Precautions

• Correct Selection:

• Choose the appropriate probe diameter and model based on shaft diameter, measurement range, environmental conditions, and application requirements.

• Correct Installation:

• Follow Bently Nevada's installation guidelines, ensuring the air gap between the probe tip and the shaft surface is within the recommended range.

• Ensure the probe is securely mounted to prevent loosening.

• Use Matching Extension Cables and Monitors:

• Must use Bently Nevada-recommended extension cables and monitors/signal conditioners to ensure signal accuracy and compatibility.

• Environmental Conditions:

• Avoid exposing the probe to temperatures outside its operating range or corrosive substances.

• Regular Inspection:

• Regularly inspect the probe, cables, and connectors for damage or looseness.

• Avoid Physical Damage:

• Handle the probe carefully during installation and maintenance to avoid physical damage.

Product Applications

Bently Nevada non-contact eddy current probes are widely used in condition monitoring and protection systems for various rotating machinery, including but not limited to:

• Steam Turbines and Gas Turbines:

• Shaft vibration and axial position monitoring.

• Compressors:

• Radial and axial vibration monitoring.

• Pumps:

• Shaft vibration and bearing condition monitoring.

• Motors and Generators:

• Shaft vibration and air gap monitoring.

• Gearboxes:

• Shaft vibration and gear mesh monitoring.

• Wind Turbines:

• Main shaft and gearbox vibration monitoring.

• Other Rotating Machinery:

• Any equipment requiring monitoring of shaft displacement, vibration, and speed.

Shipping Port: Xiamen, China