Emerson PR6423/010-040 CON021 Eddy Current Sensor

The Emerson PR6423/010-040 (part of the EPRO product line) is a high-performance eddy current sensor system designed for non-contact measurement of shaft vibration, displacement, and eccentricity in critical rotating machinery . As a core component of Emerson's machinery protection strategy, this 8mm sensor, when paired with the CON021 signal converter, provides the accuracy and reliability required for API 670-compliant monitoring of steam turbines, gas turbines, compressors, pumps, and fans .

What is the Emerson PR6423/010-040?

The PR6423/010-040 is an eddy current displacement sensor system consisting of two primary components: the PR6423/010 probe and the CON021 signal converter (often referred to as a "proximitor" or "driver") . It operates on the principle of eddy current loss, generating a low-power radio frequency field that reacts to the proximity of conductive targets. This non-contact technology ensures that there is no mechanical wear, offering virtually unlimited sensor life and maintenance-free operation .

The model designation "010-040" provides specific configuration details:

PR6423: The sensor series, featuring an 8mm probe with a standard measuring range of 2.0 mm and a case thread of M10x1 .

010: Typically indicates the mounting thread specification (M10×1 metric thread) and cable configuration .

040: Indicates the integral cable length, specifically 10 meters, providing flexibility for routing in complex industrial installations .

Key Technical Specifications (Specs)

The Emerson PR6423/010-040 is engineered to deliver uncompromising performance in the most demanding environments.

Manufacturer: Emerson (EPRO)

Product Type: Eddy Current Displacement Sensor / Vibration Probe

Sensor Size: 8 mm diameter

Mounting Thread: M10x1 

Linear Measurement Range: 2.0 mm (80 mils) 

Initial Air Gap: 0.5 mm (20 mils) 

Incremental Scale Factor (ISF): 8 V/mm (203.2 mV/mil) ±5% 

Deviation from Linear (DSL): ±0.025 mm (±1 mil) 

Minimum Shaft Diameter: 25 mm (0.79”) 

Target Material: Ferromagnetic steel (e.g., 42CrMo4, AISI/SAE 4140) 

Frequency Response (-3 dB): 0 to 20,000 Hz (with CON021) 

Operating Temperature (Sensor Tip): -35°C to +200°C (-31°F to +392°F) 

Operating Temperature (CON021): -30°C to +100°C (-22°F to +212°F) 

Environmental Protection: Sensor IP66, Converter IP20 

System Components: PR6423/010 Probe + CON021 Signal Converter 

Output Signal: Voltage proportional to displacement (via CON021)