EPRO PR6423/010-140 CON011 Eddy Current Proximity Sensor

PR6423/010-140 CON011 — Stop the Clock on Your Downtime. Ship Today.

Every hour a critical rotating machine sits idle costs real money. A failed eddy current proximity sensor on a steam turbine, centrifugal compressor, or gas expander doesn’t just trigger a shutdown alarm — it locks out your entire condition monitoring system, blinds your protection rack, and forces a manual hold on restart. The EPRO PR6423/010-140 CON011 is the exact assembly you need to restore full shaft displacement and radial vibration monitoring without a rack reconfiguration, without a sensitivity recalibration, and without waiting weeks for an OEM delivery cycle.

We stock this unit in Xiamen. It ships the same business day on confirmed orders placed before 15:00 CST. DHL Express and FedEx International Priority are both available. If your plant is down right now, read the troubleshooting section below first — then call us.

URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Ten years of field calls on rotating machinery teaches you that most PR6423 failures fall into three categories. Here’s how to diagnose fast and replace right.

Fault Code: OK/DANGER/ALERT with no shaft movement (static machine)
The CON011 proximitor has lost its DC bias. Measure the gap voltage at the proximitor output terminal. You should read between −10 VDC and −18 VDC at nominal gap. If you’re reading 0 V or rail voltage (−24 V), the probe coil is open or shorted. Disconnect the coaxial cable at the proximitor input and measure probe impedance — nominal is 8–12 Ω. Anything outside that range: replace the probe assembly. Do not replace only the CON011 without verifying probe integrity first.

Fault Code: GAP NOT OK / Probe Fault on MMS 6110 or BN 3500 rack
This almost always means the gap is outside the linear range (below 0.25 mm or above 2.25 mm) or the cable has a break. Before condemning the sensor, physically verify the probe-to-shaft gap with a feeler gauge at the probe tip. Target gap for PR6423/010 is 1.0 mm ± 0.25 mm. If gap is correct and fault persists, swap the CON011 proximitor first — it’s the more common failure point in high-vibration environments due to internal capacitor degradation.

Replacement Procedure — Critical Steps:

• Power down the monitoring rack channel before disconnecting the coaxial cable. Hot-swapping the CON011 while the rack is live can trigger a spurious trip on adjacent channels.
• When installing the new probe, set the gap to exactly 1.0 mm using a non-ferrous feeler gauge. Tighten the locknut to 15–20 Nm. Do not use thread sealant on the probe threads — it changes the effective probe depth.
• After reconnecting the CON011, verify the gap voltage reads −10.4 VDC ± 0.5 V at 1.0 mm gap. This confirms the new assembly is within calibration without requiring a full rack recalibration.
• If replacing into a Bently Nevada 3500 rack: the PR6423/010-140 CON011 is a direct functional replacement for the 3300 XL 11 mm probe system. No rack configuration change is required. The 3500 rack will recognize the −24 V output and 200 mV/mil sensitivity automatically.
• Check the CON011 proximitor DIP switches if your unit has them (early production runs). Switch positions control the OK relay threshold. Default factory setting is correct for most applications — do not adjust unless your rack documentation specifies otherwise.
• Log the replacement in your CMMS with the new serial number. EPRO embeds the manufacture date in the serial code — this matters for warranty tracking and future failure trend analysis.

Common Misdiagnosis: Plants frequently replace the probe when the actual failure is the coaxial extension cable, particularly at the connector crimp points. Before ordering a full PR6423/010-140 CON011 assembly, inspect the cable armor for kinking or crush damage near the conduit entry. A damaged cable costs a fraction of the full assembly.

Reliability in Harsh Conditions

The PR6423/010-140 is not a laboratory instrument. It was designed from the ground up for continuous deployment in the worst environments rotating machinery can produce.

The probe body is machined from 316 stainless steel with a ceramic-filled epoxy tip that resists oil, process gas condensate, and aggressive cleaning agents. The armored extension cable uses a stainless steel braid over PTFE-insulated coaxial core — this combination handles continuous vibration at the probe mounting point without fatigue cracking, which is the primary failure mode of standard RG-type cables in turbomachinery applications.

Thermal cycling is handled through the probe’s matched-coefficient construction. The coil winding, core material, and housing expand and contract at matched rates, keeping sensitivity drift below 0.5% across the full −35°C to +120°C operating range. In steam turbine bearing housings where ambient temperatures routinely exceed 80°C, this stability is what separates a reliable protection system from one that generates nuisance trips on hot summer days.

The CON011 proximitor enclosure is rated IP54 and is designed for panel or junction box mounting within 9 meters of the probe. Internal conformal coating on the PCB protects against condensation in high-humidity environments — a critical feature for coastal plants, offshore platforms, and tropical climates where humidity regularly exceeds 95% RH. Vibration resistance of the CON011 is tested to IEC 60068-2-6, covering 10–500 Hz sweep at 2g — sufficient for mounting on or near the machine casing in most installations.

Global Express Logistics

Our warehouse is located in Xiamen, Fujian Province — one of China’s primary export hubs with direct access to Xiamen Gaoqi International Airport and daily consolidated freight departures to major global hubs.

Standard export process for urgent orders:

• Order confirmed before 15:00 CST: Same-day packing and export documentation preparation.
• DHL Express Worldwide: Xiamen to most European, Middle Eastern, and Southeast Asian destinations in 2–4 business days. North America typically 3–5 business days.
• FedEx International Priority: Available for US, Canada, and select Latin American destinations. Transit 2–4 business days from Xiamen.
• Export documentation: Commercial invoice, packing list, and certificate of origin prepared same day. CITES, dangerous goods, and dual-use declarations not applicable for this product.
• Customs value: Declared at actual transaction value. HS Code 8543.70.9000 (proximity sensors/transducers) applies in most jurisdictions — confirm with your import broker for country-specific classification.
• Tracking: AWB number provided within 2 hours of carrier pickup. Real-time tracking link sent via email and WhatsApp.

For plant shutdowns requiring delivery within 24–48 hours to specific destinations, contact us directly on WhatsApp before placing the order. We will confirm the fastest available routing and provide a firm delivery commitment before you commit to the purchase.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
© 2026 siemensplc.com. All rights reserved.