Bently Nevada 33103-00-04-10-02-00 (3300 XL 8 mm Proximity Probe) – For precise shaft vibration and position monitoring

This configuration appears to correspond to the Bently Nevada 3300 XL 8 mm proximity probe (commonly written as 330103-00-04-10-02-00), used with a matching Proximitor sensor and extension cable to measure shaft vibration, radial position, and thrust position on critical rotating machinery. From my experience, this is the go-to probe family for turbines, compressors, and large motors when you need stable 200 mV/mil output and dependable linearity across the standard 80 mil (2.0 mm) range. You might notice that this option code set (-04-10-02) typically denotes a short pigtail probe cable, standard coax connector, and 3/8-24 UNF mounting thread—ideal for brownfield retrofits and most API 670-compliant installations.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• 8 mm probe tip (3300 XL series): The most widely used size for general-purpose shaft vibration and position on medium to large machines.
• 200 mV/mil (≈7.87 mV/µm) sensitivity: Delivers a clean, linear output with the matching 3300 XL Proximitor for API 670-style monitoring.
• Typical linear range ~2.0 mm (80 mils): Enough headroom for both vibration and slow-roll/runout analysis.
• Option -02 thread (3/8-24 UNF): Easy retrofit into existing probe brackets and machine case cavities; jam-nut locking for repeatable gaps.
• Robust high-temp construction: Designed for elevated temperatures commonly found around bearings and seals; maintains stability in many cases up to 177 °C.
• System compatibility: Works with 3300 XL Proximitor sensors (e.g., 330171) and extension cables (e.g., 330130) for a calibrated chain.
• Calibrated to AISI 4140 steel: Ensures the factory-stated accuracy when used on standard rotors and targets.

Technical Specifications

Application Fields

You’ll typically see this probe on steam and gas turbines, centrifugal compressors, large pumps, and critical fans where non-contact measurement is mandatory. It’s equally at home monitoring radial vibration, differential expansion, and thrust position on API 670-compliant skids. One customer in a petrochemical plant shared that swapping to this 8 mm probe size simplified spares—fewer SKUs, same linearity—and the maintenance team appreciated how quickly they could re-gap after bearing work.

Advantages & Value

• Reliability under harsh conditions: Stable performance near hot bearings and in oil mist; fewer drift-related callouts.
• Compatibility across fleets: Works with established 3300 XL chains; simplifies mixed-asset standardization.
• Lifecycle cost savings: Proven 200 mV/mil standard means quicker diagnostics and less time fine-tuning monitor scaling.
• Support and spares strategy: From my experience, keeping common 8 mm probes, 330171 Proximitor sensors, and 330130 cables on the shelf cuts downtime substantially.

Installation & Maintenance

• Mounting: Install into a rigid probe bracket or case port using the 3/8-24 UNF thread; lock with the jam nut. Keep probe axis perpendicular to the shaft surface.
• Cabinet and routing: Use shielded/coax runs through metallic conduit where possible. Maintain separation from high-voltage lines to reduce noise.
• Gap setting: Set the initial gap using a feeler gauge or by targeting the recommended DC bias voltage from the Proximitor (commonly around -10 to -12 VDC on many systems).
• Ventilation & environment: Avoid direct impingement of hot process gas; keep the probe face clean from debris and varnish buildup.
• Routine checks: Inspect connectors and cable armor, verify bias voltage, and confirm sensitivity during planned outages. Firmware updates apply to the monitor, not the passive probe.
• Calibration note: The system is factory calibrated to AISI 4140 targets; if the rotor material differs, expect slight sensitivity variation and adjust monitor scale factors if necessary.

Quality & Certifications

• Typically complies with CE requirements; RoHS alignment on recent builds
• Hazardous area approvals (ATEX/IECEx/CSA) available on certain options; confirm per exact option code
• Manufacturer’s warranty commonly one year; our supply warranty is 365 days as stated above

Supporting Components You May Need

• 330171 Proximitor Sensor (8 mm): Drives the probe and provides the conditioned DC/AC outputs to the monitor.
• 330130 Extension Cable: Connects the probe to the Proximitor; available in common lengths to reach the cabinet.
• API 670-compatible monitor: Configured for 200 mV/mil scaling (or 7.87 mV/µm) to match the 3300 XL chain.

One thing I appreciate is how this 8 mm option strikes a balance—large enough for rugged installs, small enough for tight housings. If your goal is consistent vibration trending with fewer surprises during turnarounds, this configuration tends to be a safe, proven pick.