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The Emerson PR6426 is a vibration sensor (also known as a proximitor) commonly used in industrial machinery monitoring, particularly with Bently Nevada condition monitoring systems. It is part of Emerson's non-contact displacement transducer series, designed to measure the relative vibration of rotating equipment such as turbines, compressors, and motors.
Key Features of the PR6426:
Type: Eddy current displacement sensor (proximity probe)
Measurement: Detects changes in distance (displacement) between the probe tip and a conductive target (typically a shaft).
Output: Analog signal proportional to the gap between the probe and the target.
Compatibility: Works with Bently Nevada monitoring systems (e.g., 3500/3300 series).
Typical Applications:
Shaft vibration monitoring
Radial/axial position measurement
Rotor dynamics analysis
Machinery protection
Specifications (General)
Operating Temperature: Up to 175°C (347°F) with appropriate extension cable.
Frequency Response: Typically 0 to 10 kHz.
Power Supply: Requires an external -24V DC power source (provided by compatible monitors like the Bently Nevada 3300/3500 system).
Cable Length: Often used with 9 m (30 ft) or 5 m (16 ft) cables, but can vary.
Common Uses in Industry
Turbines (steam/gas)
Compressors
Pumps & motors
Generators
The PR6426 is part of a larger family, where the last digit (or letters) may indicate different versions or certifications. Common variants include:
Standard version with a 9-meter (30 ft) cable.
Used for general vibration and displacement monitoring.
May have a 5-meter (16 ft) cable or different termination.
High-temperature version (up to 175°C/347°F) with a special cable.
Often used in steam turbines or hot machinery sections.
Intrinsically safe (IS) version for hazardous areas (if applicable).
PR6426 with -C or -S suffix
May indicate connector type (e.g., -C for quick-disconnect).
