Emerson PR6426/010-130 20 mm Eddy Current Sensor

Configured for extra-extended range non-contact axial position and differential expansion monitoring in large rotating machinery, the Emerson PR6426/010-130 (PR6426 20 mm Eddy Current Sensor) provides direct physical/electrical execution. It detects dynamic shaft movements across an 8.0 mm linear span by inducing high-frequency field damping when connected to compatible epro driver electronics.

Suffix Breakdown & Model Matrix

• PR6426: 20 mm tip diameter extra-extended range sensor series.
• 010: Integral cable options (flexible stainless steel armored execution).
• 130: M20 x 1.5 mechanical mounting body thread profile.

Hardware Specifications

4-20 mA HART Loop Protocol and Signal Conditioning Integration

The Emerson PR6426/010-130 interfaces with epro signal converters (such as the CON 041) to convert high-frequency electromagnetic field variations into stable measurement metrics. The system leverages the 4-20 mA HART loop protocol to transmit overall axial expansion and static position trends back to host DCS networks, while simultaneously offering raw AC voltage outputs for spectrum analysis. The 20 mm sensing element utilizes precise driver-side calibration to maintain linear performance across its 8.0 mm operational range, ensuring high immunity to signal cross-talk in dense installation spaces.

Frequently Asked Questions

Q: What is the main structural feature of the PR6426/010-130 compared to unarmored variants?

A: The "010" suffix designates an integral flexible stainless steel armored cable that provides mechanical protection against crush forces and hot environment hazards.

Q: What side clearance is required for the 20 mm tip to prevent target distortion?

A: A minimum lateral radial space of 40 mm around the probe tip must be kept clear of secondary metallic surfaces to prevent unwanted side-wall field damping.

Q: Can the cable length of the PR6426/010-130 be altered in the field?

A: Cutting or extending the integral armored cable alters system impedance, invalidating the driver calibration and causing accuracy errors across the 8.0 mm measuring span.

Field Installation Guidelines

• Thread the M20 x 1.5 body into the bracket, ensuring at least 5 full engagement threads before tightening lock nuts to specification.
• Maintain a minimum 40 mm lateral clearance zone around the 20 mm tip to prevent electromagnetic field corruption from nearby casing walls.
• Secure the flexible stainless steel armored cable with proper cable clamps, maintaining a minimum bend radius of 35 mm to avoid core damage.
• Connect instrument shield wiring exclusively to the designated system ground point at the transmitter enclosure to avoid ground loops.