Key Technical Parameters of the Emerson EPRO PR6423/001-121

The Emerson EPRO PR6423/001-121 is a non-contact eddy current sensor. Therefore, it measures radial and axial shaft dynamic displacement. For instance, this model works for steam, gas, and hydro turbines.

Specifically, the Emerson EPRO PR6423/001-121 offers a linear measurement range of 2 mm (80 mils). The initial air gap requirement is 0.5 mm (20 mils). In addition, the sensor needs this gap for proper operation.

The Incremental Scale Factor (ISF) is 8 V/mm (203.2 mV/mil) ±5%. This specification applies within 0°C to 45°C temperature range. Meanwhile, the deviation from best fit straight line (DSL) is ±0.025 mm (±1 mil).

The minimum shaft diameter for this sensor is 25 mm (0.79 inches). Consequently, it works with ferromagnetic steel targets. For example, the standard target material is 42CrMo4 (AISI/SAE 4140). Other materials are available on request.

Environmental Tolerance and Operating Limits

The Emerson EPRO PR6423/001-121 has outstanding environmental resistance. Therefore, its protection class is IP66 per IEC 60529. This makes it suitable for harsh industrial environments.

The sensor including its 1m cable operates from -35°C to +180°C. However, the cable and connector together handle only -35°C to +150°C. As a result, consider both limits during installation.

The sensor tip uses PEEK (Polyether Ether Ketone) material. Furthermore, the case is made of stainless steel for durability. The cable uses PTFE (Polytetrafluoroethylene), and the connector is brass with nickel plating.

The total weight of sensor with 1m cable is approximately 100 grams (3.53 oz). Thus, it is very lightweight and easy to mount.

Compliance and Hazardous Area Approvals

The Emerson EPRO PR6423/001-121 holds multiple important certifications. For example, it complies with CE directives 2014/30/EU and 2014/34/EU. In addition, it meets ATEX EN 60079-0 and EN 60079-11 standards.

The sensor also has IEC-Ex certification under IEC 60079-0 and IEC 60079-11. Moreover, it complies with CSA and ANSI/UL standards. As a result, this sensor is suitable for global installations.

For hazardous areas, the sensor offers Intrinsic Safety (ia) approval. It also provides Non-sparking (nA) approval. The temperature classification depends on the converter used.

Specifically, T6 classification allows Ta ≤ 64°C. T4 classification allows Ta ≤ 114°C. T3 classification allows Ta ≤ 160°C.

Installation Guidelines for Reliable Measurement

Always use a stiff and vibration-free sensor holder. Consequently, this prevents false readings from mounting motion. In addition, define a suitable measuring range with the plant operator.

Consider environmental conditions before installation. For example, temperature, aggressive substances, and pollution matter. Therefore, use a sensor that meets your defined measuring range requirements.

Ensure an EMC-compatible installation with proper cables. Specifically, the Emerson EPRO PR6423/001-121 has a case thread of M10x1. The case length is 35mm, and it has no armored cable.

The cable length for this model is 5.0 meters. The cable end is open (flying leads). As a result, you can connect it directly to your monitoring system without extra adapters.

Packaging List for the Emerson EPRO PR6423/001-121

• 1 x Emerson EPRO PR6423/001-121 sensor body

• 1 x Integrated 5.0 meter PTFE cable

• 1 x Open cable ends (flying leads)

• 1 x Product installation leaflet

Frequently Asked Questions (FAQ)

1. What is the linear measurement range of this sensor?
The linear measurement range is 2 mm (80 mils). Therefore, the initial air gap should be set at 0.5 mm (20 mils).

2. Can this sensor measure both radial and axial displacement?
Yes, the Emerson EPRO PR6423/001-121 measures both radial and axial shaft displacement. Consequently, it works for position, eccentricity, and speed measurement.

3. What is the difference between PR6423/001-121 and PR6423/002-030?
The main difference is case length and cable termination. This model has a 35mm case with 5m open cable ends. The other model has a 45mm case with 8m Lemo connector.

4. Is this sensor approved for hazardous areas?
Yes, it has ATEX, IEC-Ex, and CSA approvals. Specifically, it offers Intrinsic Safety (ia) and Non-sparking (nA) classifications.

5. What is the operating temperature limit?
The sensor with 1m cable operates from -35°C to +180°C. However, the full cable range is -35°C to +150°C.