Epro PR6423/016-030+CON021 Displacement System

Product Description

The Emerson EPRO solution combining PR6423/016-030 proximity probe with CON021 signal conditioner is a precision eddy-current measurement system developed for continuous shaft monitoring in rotating equipment.

This configuration enables accurate detection of shaft vibration, axial position changes, eccentricity, and thermal growth. The probe captures displacement signals, while the CON021 module converts them into standardized analog outputs for integration with control systems and machinery protection platforms.

The system is factory-matched and aligned with API 670 requirements, ensuring reliable long-term operation without additional calibration.

Probe Design and Configuration

The PR6423/016-030 belongs to the 8 mm probe series and is configured for installations requiring compact geometry and fixed cable routing.

• Code “016” indicates a special mechanical design optimized for restricted mounting spaces

• Code “030” specifies an integrated 3-meter cable

This version is commonly selected for installations where predefined cable length and simplified installation are required.

PR6423/016-030 Technical Specifications

Measurement Characteristics

• Measurement principle: Eddy-current non-contact sensing

• Probe tip diameter: 8 mm

• Linear measurement range: 2.0 mm (80 mil)

• Nominal working gap: 0.5 mm

• Sensitivity: 8 V/mm

• Frequency response: DC to 10 kHz

• Resolution: better than 0.1 µm (system dependent)

• Linearity: ≤ ±1% of full scale (with matched conditioner)

• Minimum shaft diameter: ≥25 mm

• Target material: Ferromagnetic steel (e.g., AISI 4140 / 42CrMo4)

Mechanical and Environmental Data

• Thread options: M10 × 1 or 3/8"-24 UNF

• Cable length: 3 m integral cable

• Cable type: PTFE insulated, optional armored version

• Housing: Stainless steel construction

• Probe tip: PEEK material

• Operating temperature (probe): –35 °C to +180 °C

• Cable temperature limit: up to +150 °C

• Protection class: IP66

• Shock resistance: up to 40 g

• Vibration endurance: up to 20 g (10–2000 Hz)

CON021 Signal Converter Specifications

Electrical Performance

• Supply voltage: 24 V DC ±10%

• Output signals:

• 4–20 mA

• 0–20 mA

• 0–10 V

• Linearity deviation: ≤ ±1.5% (with matched probe)

• Temperature drift: ≤ 0.05% per °C

• Frequency bandwidth: DC to 10 kHz

Compatibility and Installation

• Supported probe series: PR6422 / PR6423 / PR6424 / PR6426

• Mounting method: 35 mm DIN rail

• Protection rating: IP20

• Electrical connection: Terminal-based wiring

Integrated System Performance

The combined PR6423/016-030 + CON021 configuration delivers a stable and calibrated displacement monitoring solution:

• Measurement method: Eddy-current non-contact

• Measuring range: 2 mm

• Sensitivity: 8 V/mm

• Frequency range: up to 10 kHz

• Output: Standard analog signals for PLC/DCS

• High temperature capability: up to +180 °C at probe

• Factory-matched system eliminates field calibration

Application Areas

• Axial displacement monitoring in steam and gas turbines

• Shaft vibration and eccentricity analysis in compressors

• Gearbox shaft alignment and bearing clearance tracking

• Dynamic displacement measurement in pumps and fans

• Continuous condition monitoring of critical rotating assets

FAQ

Q: Is this system ready for installation without calibration?
A: Yes, the probe and converter are factory-matched and ready for use.

Q: What output signals are available?
A: The CON021 supports 4–20 mA, 0–20 mA, and 0–10 V outputs.

Q: Can the probe operate in high-temperature environments?
A: Yes, it is rated for continuous operation up to +180 °C.

Q: What distinguishes the 016 configuration?
A: It provides a compact mechanical design suited for limited installation space.