EMERSON PR6426/010-000 CON021/916-160 Original Spare 3300 Series

Product Overview

EMERSON PR6426/010-000 CON021/916-160 Original Spare 3300 Series: System Stability & Industrial Maintenance Value

The EMERSON PR6426/010-000 + CON021/916-160 is a factory-original eddy current proximity probe and extension cable assembly engineered for the Bently Nevada 3300 Series continuous vibration monitoring platform. In rotating machinery environments — turbines, compressors, pumps, and generators — shaft proximity measurement is the first line of defense against catastrophic mechanical failure. This matched probe-and-cable assembly delivers the calibrated sensitivity and signal integrity that the 3300 Series monitor expects, ensuring your vibration data remains accurate, alarm thresholds remain valid, and your protection system remains trustworthy.

For maintenance engineers managing aging DCS or PLC-integrated machinery protection systems, sourcing a genuine, tested replacement for the PR6426/010-000 probe and CON021/916-160 extension cable is not a commodity decision — it is a system integrity decision. A mismatched or uncalibrated probe introduces measurement error that can mask developing faults or trigger nuisance trips, both of which carry significant operational and safety costs. This original spare eliminates that risk.

Critical Technical Specs

Preventive Maintenance Strategy

A proximity probe replacement is rarely an isolated event. When a PR6426/010-000 probe shows drift, signal noise, or physical damage, experienced maintenance teams treat it as a trigger for a broader inspection of the entire vibration monitoring loop and the surrounding control cabinet. The probe, extension cable, and driver module form a calibrated system — replacing only one element without verifying the others introduces uncertainty into your protection chain.

During a scheduled outage or corrective maintenance window, it is best practice to simultaneously inspect the Bently Nevada 3300 XL 8 mm Proximitor driver module (typically rack-mounted alongside the monitor) for output voltage stability and connector integrity. The 3300/16-02-01-00 16-channel vibration monitor should be checked for channel alarm setpoints, OK relay status, and any latched fault conditions. If the machine has been in service for more than three years, consider proactively replacing the CON021 series extension cables across all monitored channels — cable jacket degradation and connector corrosion are common causes of intermittent signal faults that are difficult to diagnose under load.

For turbine and compressor trains, the proximity probe system works in concert with other critical instrumentation. The Bently Nevada 3500/42M Proximitor/Seismic Monitor and associated 3500/22M Transient Data Interface modules should be verified for firmware currency and communication health during the same maintenance window. On the power supply side, the 3500/15 Power Supply module should be load-tested — a degraded power supply is a frequent root cause of unexplained probe OK dropouts that are misdiagnosed as probe failure.

Beyond the Bently Nevada rack itself, a thorough inspection should extend to the field junction boxes and terminal blocks connecting probe cables to the monitor rack. Loose terminations, moisture ingress, and shield grounding faults at these points can introduce noise that mimics probe failure. If your facility uses EMERSON DeltaV DCS to integrate machinery protection data, verify that the 3300 Series communication gateway — such as a Modbus RTU or OPC-UA interface module — is correctly mapping vibration and position values to the DCS historian and that no stale alarms are masking real-time data.

For facilities running older Bently Nevada 7200 Series legacy systems alongside newer 3300 installations, this is also an appropriate time to audit probe compatibility across platforms and flag any mixed-generation assemblies that may not share the same scale factor or gap voltage standard. Maintaining a documented spare inventory that includes matched probe-cable-driver sets — along with spare 3300 Series rack backplanes and I/O terminal modules — for each monitored machine train significantly reduces mean time to repair (MTTR) during unplanned outages.

Strategic Replacement Solutions

The PR6426/010-000 + CON021/916-160 assembly is a direct, drop-in replacement for worn or damaged probes in any Bently Nevada 3300 Series installation. Because it is a factory-original part calibrated to the 3300 system’s expected scale factor and gap voltage, no recalibration of the monitor module is required upon installation — a critical advantage when minimizing restart time after an unplanned shutdown.

For facilities managing end-of-life machinery where original OEM support has been discontinued, stocking this assembly as a long-term spare extends the operational life of the protection system without requiring a full platform migration. The 3300 Series remains widely deployed across petrochemical, power generation, and heavy manufacturing industries, and genuine spare availability is the primary constraint on system longevity. Securing verified original stock now — rather than sourcing under emergency conditions — eliminates the risk of receiving counterfeit or out-of-specification parts during a critical outage.

Each unit shipped from TOPNLMS undergoes pre-shipment functional verification including gap voltage output check, cable continuity and insulation resistance testing, and connector inspection. Units are packaged to OEM standards with anti-static protection and moisture barrier packaging suitable for long-term storage. A 12-month warranty covers manufacturing defects and functional performance from the date of receipt.

Support FAQ

Q1: Is this a genuine EMERSON / Bently Nevada original part, or an aftermarket equivalent?
This is a genuine, factory-original EMERSON Bently Nevada PR6426/010-000 + CON021/916-160 assembly — not an aftermarket reproduction. The probe and extension cable are matched and calibrated to the 3300 Series system specification, ensuring full compatibility without monitor reconfiguration.

Q2: How do I verify compatibility with my existing 3300 Series installation before ordering?
Confirm the probe tip diameter (8 mm), extension cable length (9.0 m for CON021/916-160), and driver module part number in your existing installation. The PR6426/010-000 is compatible with all standard 3300 XL 8 mm Proximitor drivers. If you are unsure, contact us with your monitor rack part number and we will confirm compatibility before shipment.

Q3: What pre-shipment testing is performed, and what does the 12-month warranty cover?
Every unit undergoes gap voltage output verification, cable continuity and insulation resistance testing, and physical connector inspection prior to shipment. The 12-month warranty covers functional defects and performance deviations from the published specification. It does not cover damage resulting from incorrect installation, mechanical impact, or operation outside rated environmental limits.

Q4: What is the recommended spare inventory strategy for a facility with multiple 3300 Series monitored machines?
Industry best practice for critical rotating machinery is to maintain a minimum of one matched probe-cable set per monitored machine train, stored in a climate-controlled environment. For facilities with four or more monitored trains, a pooled spare of two to three assemblies is recommended to cover simultaneous failures during major turnarounds. TOPNLMS can support bulk procurement with volume pricing — contact us for a quote.