Description
Emerson PR6423/001-000 Product Description
Product Overview
Emerson PR6423/001-000 is an 8 mm Eddy Current (Eddy-Current) Proximity Sensor used for non-contact measurement of rotating-shaft displacement, vibration, axial/radial position, eccentricity and speed. It belongs to the PR6423 sensor family used with Emerson/CSI machinery monitoring systems. Emerson specifically describes the PR6423 as a non-contact sensor for critical turbomachinery applications.
The PR6423 operates as part of a complete eddy-current measurement system together with a compatible signal converter/proximitor. It is therefore important not to treat the probe itself as a complete vibration-monitoring channel.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson / CSI |
| Model | PR6423/001-000 |
| Product Type | 8 mm Eddy Current Proximity Sensor |
| Measurement Principle | Eddy-current / non-contact |
| Probe Diameter | 8 mm |
| Primary Measurements | Shaft displacement, vibration, position, eccentricity, speed |
| Linear Measuring Range | 2 mm (80 mils) |
| Initial Air Gap | 0.5 mm (20 mils) |
| Incremental Scale Factor | 8 V/mm (203.2 mV/mil) ±5% |
| Linearity Deviation | ±0.025 mm (±1 mil) |
| Minimum Shaft Diameter | 25 mm |
| Standard Target Material | 42CrMo4 / AISI 4140 steel |
| Sensor Protection | IP66 |
| Sensor Operating Temperature | -35 to +180 °C |
| Cable/Connector Temperature | -35 to +150 °C |
| Sensor Tip Material | PEEK |
| Sensor Housing | Stainless steel |
| Cable | PTFE |
| Typical Application | Critical rotating machinery |
Emerson’s current PR6423 specification confirms the 8 mm design, 2 mm linear measuring range, 0.5 mm initial gap, 8 V/mm scale factor and -35 to +180 °C sensor operating range.
Part Number Configuration
The PR6423 family uses an ordering matrix that determines the mechanical and cable configuration. Emerson documentation identifies options including:
- Sleeve thread: M10 × 1 or 3/8-24 UNF
- Armored or unarmored cable
- Different sleeve lengths
- Adapter plug options
- Different total cable lengths
- LEMO connector or open cable end
Therefore, PR6423/001-000 should be matched by the complete ordering code when replacing an installed probe.
PR6423001-000
Main Features and Advantages
Non-Contact Shaft Measurement
The PR6423 uses an eddy-current principle, allowing measurement without physical contact between the probe tip and rotating shaft. This eliminates mechanical wear at the sensing point and makes the technology particularly suitable for high-speed machinery.
8 mm Probe Construction
The 8 mm probe is intended for industrial machinery monitoring and can measure both static shaft position and dynamic displacement/vibration. Emerson specifies a minimum target/shaft diameter of approximately 25 mm for the standard configuration.
High-Temperature Capability
The sensor itself can operate continuously from approximately -35 to +180 °C, making it suitable for machinery environments involving elevated bearing or casing temperatures.
High Measurement Accuracy
The specified incremental scale factor is 8 V/mm (203.2 mV/mil) with ±5% tolerance over the specified temperature range, while deviation from the best-fit straight line is specified at ±0.025 mm.
Industrial Environmental Protection
The stainless-steel housing, PEEK sensor tip and PTFE cable construction provide resistance to demanding industrial environments. Emerson specifies an IP66 protection class for the sensor assembly.
Application Fields
Steam Turbines
PR6423 sensors can monitor radial shaft vibration, axial displacement and shaft position in steam-turbine bearing systems.
Gas and Hydro Turbines
The sensor is suitable for continuous monitoring of rotating shafts in gas and hydroelectric turbine equipment. Emerson specifically lists steam, gas and hydro turbines among the intended applications.
Compressors
In high-speed compressors, proximity probes can detect shaft vibration and displacement, providing important information for machinery protection.
Pumps and Fans
The PR6423 can be applied to critical pumps, fans and other rotating machinery where non-contact shaft monitoring is required.
Gearboxes
The sensor can monitor rotating components in gearboxes and other transmission equipment where abnormal shaft movement or vibration may indicate mechanical degradation.
System Integration
The PR6423 is normally used with a compatible converter/proximitor. Emerson documentation lists compatible converter families including CON011, CON021, CON031 and CON041, as well as related AMS 3000/AMS 9360 equipment.
A typical measurement chain is:
Rotating Shaft → PR6423 Probe → Extension Cable → Converter → Machinery Monitoring System / DCS
This arrangement converts the probe’s eddy-current measurement into a usable electrical signal for machinery monitoring and protection.
Related Products
- Emerson PR6422 — Related eddy-current displacement sensor for machinery monitoring.
- Emerson PR6424 — Related eddy-current sensor for rotating machinery.
- Emerson PR6425 — High-temperature eddy-current sensor family.
- Emerson CON011 / CON021 — Compatible PR6423 signal-converter families.
- Emerson CON041 — Compatible converter for PR6423 sensor installations.
- Emerson AMS 6500 Machinery Health Monitor — Machinery monitoring platform compatible with the PR6423 sensor technology.
- Emerson CSI 6500 Machinery Health Monitor — Machinery protection/monitoring platform used with PR6423 systems.
