Emerson PR6424/013-030 16mm Eddy-Current Contactless Sensor

Emerson PR6424/013-030 CON021 is a high-performance, non-contact eddy current measurement system specifically engineered for critical turbomachinery monitoring applications. This complete, factory-matched system combines a rugged 16mm eddy current sensor with the CON021 signal converter, delivering precise, reliable data for radial and axial shaft displacement, vibration, eccentricity, and position monitoring on large rotating equipment .

As part of Emerson's prestigious EPRO product line—manufactured in Germany to the highest industrial standards—the PR6424/013-030 CON021 is designed and certified to meet the stringent requirements of the API 670 standard for machinery protection systems . It represents the ideal solution for steam turbines, gas turbines, hydroelectric generators, centrifugal compressors, large pumps, and industrial fans operating in the most demanding environments .

Key Technical Specifications

Sensor Specifications (PR6424/013-030)

Parameter Value

Sensor Type Eddy Current (Non-contact) 

Sensor Head Diameter 16 mm 

Sensitivity / Linearity 4 V/mm (101.6 mV/mil) ≤ ±1.5% max 

Nominal Air Gap (Center) Approx. 2.7 mm (0.11") 

Static Measurement Range ±2.0 mm (0.079") 

Dynamic Measurement Range 0 to 1,000 µm (0 to 0.039") 

Long-Term Drift < 0.3% 

Minimum Target Shaft Diameter ≥80 mm 

Target Material Ferromagnetic Steel (42CrMo4 standard) 

Maximum Surface Speed 2,500 m/s (98,425 ips) 

Operating Temperature (Sensor) -35°C to +150°C (-31°F to +302°F) 

Temperature Error <4% / 100°K (API 670 Compliant) 

Pressure Resistance 10,000 hPa (145 psi) 

Shock and Vibration Resistance 5g @ 60 Hz @ 25°C (77°F) 

Material Stainless Steel Sleeve, PTFE Cable 

Weight (Sensor with 1m cable) Approx. 200 g (7.05 oz) 

Sleeve Thread M18 × 1.5 

Cable Type Armored PTFE 

Total Cable Length 8 m (with LEMO connector) 

Sensor Length 70 mm (C = Cx + 12.5 mm) 

Adapter Plug Included 

CON021 Signal Converter Specifications

Parameter Value

Frequency Range (-3 dB) 0 to 20,000 Hz (DC to 20 kHz) 

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

Supply Voltage Range -23V to -32V or -21V to -32V (depending on output range) 

Housing Material ALMgSi 0.5 F22 (aluminum alloy) 

Protection Class IP20 

Mounting Panel or DIN rail via 4x M5x20 screws 

Weight (Converter) Approx. 120 grams (4.24 oz)