EPRO PR6423/004-040

Product Overview

PR6423/004-040 is a high-precision eddy current sensor of Emerson's EPRO brand, with a diameter of 8 millimeters. It is specifically designed for non-contact vibration and position monitoring of rotating machinery. As part of a critical mechanical protection system, this sensor has been meticulously designed to provide reliable performance in harsh environments.

The order code "004-040" specifies the following configuration: M10x1 threaded interface, 65mm long housing (sleeve), 10-meter long integrated cable and LEMO connector. This combination makes it particularly suitable for applications that require installation through thicker mechanical housings or probe brackets, and the cable length is sufficient to connect to signal converters installed remotely. It is usually used in conjunction with compatible converters (such as CON021) to form a complete measurement channel for monitoring parameters such as radial shaft vibration of small and medium-sized turbomatinery.

Product Parameters

Incremental Scale Factor (Sensitivity)         8 V/mm (±203.2 mV/mil) ±5% (0 to 45°C)

Linearity (Deviation from Straight Line)      ±0.025 mm (±1 mil) (0 to 45°C)

Linear Measurement Range                      2.0 mm (80 mils)

Sensor Diameter                                     8 mm

Thread                                                   M10x1

Case Length (Sleeve)                               65 mm (Specified by '4' in the code)

Wrench Flat                                            SW 11 mm

Initial Air Gap                                         0.5 mm (20 mils)

Target Material                                       Ferromagnetic Steel (42CrMo4 / AISI 4140 Standard)

Minimum Shaft Diameter                          25 mm (0.79")

Operating Temperature                           Sensor & 1m Cable: -35°C to +180°C (-31°F to 356°F)

                                                           able & Connector: -35°C to +150°C (-31°F to 302°F)

Protection Class                                     IP66 (Dust-tight and protected against powerful water jets)

Material                                                Case: Stainless Steel

                                                           Sensor Tip: PEEK (Polyether Ether Ketone)

                                                           Cable: PTFE

Cable Length                                        10 meters (Specified by '4' in the final part of the code)

Cable Type                                           Standard PTFE, Unarmored (2.8 mm diameter)

Connector                                            LEMO (Male)

Hazardous Areas                                  ATEX, IECEx, CSA (Intrinsic Safety 'ia' when used with a certified converter like CON021 and safety barriers)

Function Features

The sensitivity of PR6423 is as high as 8 V/mm, making it extremely sensitive to even the slightest change in distance. This makes it an ideal choice for detecting small-amplitude vibrations on high-speed machinery, capable of early warning of the occurrence of imbalance or misalignment faults.

The 8mm diameter and the optional long sleeve (such as the 65mm model) enable it to be installed in confined Spaces or large mechanical structures, where larger probes cannot be installed.

The outstanding high-temperature resistance enables the sensor body to withstand extreme temperatures as high as +180°C, which is crucial for applications close to high-temperature components such as steam turbines, gas turbines, and high-temperature compressors. PEEK probe material is the key to achieving this performance.

The powerful environmental sealing performance with an IP66 protection rating ensures that the sensor is completely free from dust intrusion and strong water flow impact, making it suitable for harsh industrial environments including outdoor or flushing areas.

PR6423/004-040 holds multiple international hazardous area certifications. When used in conjunction with certified intrinsically safe converters and safety barriers, it can be installed in explosive atmospheres of Class I, Zone 1 / Zone 0.

The long-distance signal integrity enables the 10-meter-long integrated cable to achieve a flexible installation layout, allowing the signal converter to be installed in the control panel far from the measurement point. Meanwhile, its robust and durable design minimizes signal attenuation.