Introduction

The Bently Nevada 21504-000-040-10-02 7200 8 mm Standard-Mount Probe is a proximity sensing component for industrial machinery monitoring applications. Proximity probe systems are widely used to measure relative shaft movement and provide information that can support vibration analysis and machinery protection.

For facilities operating legacy monitoring equipment, selecting the correct replacement probe is essential. Differences in electrical characteristics, mounting design, and system calibration can affect measurement accuracy and compatibility. Matching the complete part number helps reduce sourcing errors and supports more efficient maintenance planning.

We support industrial automation and machinery monitoring spare-parts sourcing for maintenance teams, equipment service providers, and industrial facilities. Contact us with your part number and application details to discuss availability and replacement requirements.

Technical Specifications

Parameter	Specification
Brand	Bently Nevada
Model	21504-000-040-10-02
Product Series	7200 Series
Product Type	8 mm Standard-Mount Probe
Probe Type	Proximity Probe
Total Length	1 meter
Weight	0.22 kg / 0.49 lb
Measurement Purpose	Relative shaft position and displacement monitoring
Typical Application	Rotating machinery condition monitoring
System Compatibility	Verify with the existing 7200 Series system configuration

Note: Confirm the exact thread specification, connector type, electrical characteristics, and compatible driver requirements against the product documentation before ordering or installation.

Recommended Related Models

The following Bently Nevada products are relevant to proximity measurement and machinery monitoring. They are related product options, not confirmed direct replacements for the 21504-000-040-10-02 probe.

Model / Series	Product Type
Bently Nevada 7200 Series	Proximity probe and monitoring components
Bently Nevada 3300 XL 8 mm	Proximity measurement system
Bently Nevada 3300 XL Proximitor Sensor	Proximity signal-conditioning component
Bently Nevada 3300 XL Extension Cable	Proximity system cable

Always verify series compatibility before mixing probes, cables, and signal-conditioning electronics.

Popular Related Models

Bently Nevada offers a range of monitoring components for rotating machinery protection and condition assessment. These products may be relevant to wider maintenance projects.

Model / Series	Product Type
Bently Nevada 3300 XL 8 mm	Proximity probe system
Bently Nevada 3300 XL 11 mm	Proximity probe system
Bently Nevada 3500/42M	Proximity and seismic monitoring module
Bently Nevada 3500/22M	Transient Data Interface module
Bently Nevada 3500 Series	Machinery monitoring and protection system

These components serve different functions and may use different system configurations. Confirm the specific equipment requirements before selecting related parts.

Applications

The Bently Nevada 21504-000-040-10-02 7200 8 mm Standard-Mount Probe is an industrial proximity probe component intended for machinery monitoring applications where shaft displacement and relative movement need to be measured. Proximity probes are commonly used in rotating equipment monitoring systems to provide signals associated with shaft position and vibration.

In industrial facilities, reliable shaft measurements help maintenance teams evaluate machine operating conditions and identify potential mechanical issues. When installed as part of a compatible monitoring system, an 8 mm probe can support the assessment of rotating machinery performance.

Typical application areas include:

Turbine and compressor shaft monitoring
Industrial pump and motor condition monitoring
Rotating machinery vibration measurement
Machinery protection and diagnostic systems
Preventive maintenance in power generation and process industries

Before installation, confirm that the 7200 series probe is compatible with the existing monitoring electronics, extension cable, mounting arrangement, and target material.

Advantages

Non-contact displacement measurement: Eddy-current proximity probes can measure the relative position of a conductive shaft without requiring physical contact during normal operation.

Supports rotating equipment monitoring: Shaft displacement measurements can help maintenance personnel assess vibration behavior and changes in machine operating conditions.

Standard-mount configuration: The standard-mount design supports installation in machinery arrangements designed for the corresponding probe configuration.

Convenient replacement identification: The complete part number helps purchasing and maintenance teams identify the required component when servicing existing equipment.

Suitable for industrial maintenance programs: A compatible probe can support routine monitoring, troubleshooting, and planned maintenance of critical rotating machinery.

For dependable measurements, the probe must be used with the correct compatible system components and installed according to the equipment manufacturer's requirements.

Technical FAQs

Q1: What is the Bently Nevada 21504-000-040-10-02 probe used for?

It is identified as a Bently Nevada 7200 Series 8 mm standard-mount probe. Proximity probes are commonly used to monitor shaft position and relative displacement in compatible rotating machinery systems.

Q2: How does an 8 mm proximity probe work?

An eddy-current proximity probe generates an electromagnetic field near a conductive target. Changes in the gap between the probe tip and the target affect the electrical signal, allowing compatible electronics to determine relative displacement.

Q3: Can this probe operate without a compatible signal conditioner?

The probe generally requires compatible driver or signal-conditioning electronics to produce a usable measurement signal. The correct electronics depend on the specific 7200 Series configuration.

Q4: Is this probe compatible with every Bently Nevada monitoring system?

No. Compatibility depends on the probe system, electrical characteristics, calibration, cable configuration, and monitor input requirements. Confirm the complete configuration before replacing an existing probe.

Q5: What should be checked before installation?

Verify the complete part number, probe mounting arrangement, thread and connector configuration, cable requirements, sensing system compatibility, and installation specifications.

Q6: What types of machinery can use proximity probes?

Depending on the monitoring system and installation, proximity probes may be used on turbines, compressors, pumps, motors, and other rotating machinery with suitable conductive targets.

Q7: What can cause inaccurate probe readings?

Potential causes include incorrect probe gap, damaged cables, loose connections, unsuitable target material, electrical interference, or incompatibility with the associated electronics.

Q8: Does the probe need a specific installation gap?

Yes. The operating gap must fall within the range specified for the compatible probe system. Follow the manufacturer's installation and calibration procedures rather than using a generic gap value.

Q9: Can this probe measure bearing temperature?

No. A proximity probe primarily measures relative displacement or position. Bearing temperature normally requires a dedicated temperature sensor.

Q10: What should be verified after replacing the probe?

Check mechanical installation, cable connections, probe gap, signal output, and monitoring-channel configuration. Confirm that the system readings are within the expected operating range before returning the machinery to service.

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