BENTLY 330704-00-50-10-01-CN – 3300 XL 8 mm Proximity Probe for non-contact shaft vibration and position

The BENTLY 330704-00-50-10-01-CN is part of the 3300 XL proximity transducer system, built for continuous monitoring of rotating machinery. From my experience, this model is the go‑to 8 mm probe (metric thread variant) that pairs with a 3300 XL Proximitor sensor and a matching extension cable to deliver stable gap and vibration measurements on critical assets like turbines, compressors, and high‑speed motors.
One thing I appreciate is how consistent the system response is when the full 8 mm chain is used—typically 200 mV/mil at the monitor—so you can swap probes during maintenance without re-engineering your setpoints.

Company’s Order Placement Process and Guarantees

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

Key Features

• 8 mm non-contact eddy-current probe – Measures shaft vibration and position without touching the target, ideal for high-speed rotors.
• Metric mounting thread (M10 x 1) – Fits standard metric brackets and proximity probe holders used in many EU/Asia installations.
• Integral cable length option (-50) – Typically denotes a 5.0 m integral lead to reach the extension cable junction cleanly.
• Rugged 3300 XL design – Proven stability across temperature swings and electrical noise common in large machinery skids.
• System compatibility – Designed to work with the 3300 XL Proximitor sensor and 330130 extension cable for calibrated system accuracy.
• No external power at the probe – Passive sensor head; the Proximitor handles excitation and linearization.
• Reliable scale factor (when used as a full 8 mm system) – In many cases, you’ll see the familiar 200 mV/mil response at the monitor, making trend comparisons straightforward.

Technical Specifications

Application Fields

You might notice this probe most often on:

• Steam and gas turbines – Non-contact shaft vibration and axial position trending for trip protection and diagnostics.
• Compressors and expanders – Radial vibration monitoring in harsh, high-temperature skid environments.
• Large motors, pumps, and fans – Balancing, alignment verification, and early bearing fault detection.
• Gearboxes – Detecting changes in shaft orbit and displacement that typically precede gear or bearing issues.

“Swapped in 330704 probes during a major outage on a 20 MW compressor train. Gap set quickly, and the 3500 rack trended exactly as before—no surprises.” — Maintenance Superintendent, Oil & Gas (simulated feedback)

Advantages & Value

• Reliability in tough environments – The 3300 XL build seems to handle heat and EMI better than many generic probes.
• Drop-in compatibility – Works with existing 3300 XL chains, so you typically keep your monitor scale factors and alarms unchanged.
• Lower lifecycle cost – Stable calibration reduces rework; fewer nuisance trips in many cases.
• Procurement confidence – Genuine parts traceability, 365-day warranty, and quick-turn shipping when in stock.
• Technical support – Guidance on gap setting, cable routing, and system checks helps shorten outage windows.

Supporting Components (commonly paired)

• BENTLY 330130 Extension Cable – Mini‑coax extension to the Proximitor; available in multiple lengths.
• BENTLY 3300 XL Proximitor Sensor (8 mm system) – Provides excitation and linearized displacement output to the monitor.
• BENTLY 3500 Monitoring System – Rack-based monitoring and protection modules for trending and trip logic.

Installation & Maintenance

• Mounting & gap: Use the supplied locknut and torque per OEM guidance; set cold gap typically near 1.0 mm and verify bias voltage at the monitor.
• Cable routing: Keep probe and extension cables away from high-voltage/VFD runs; maintain bend radius; avoid crushing or sharp edges.
• Cabinet & ventilation: House the Proximitor and monitors in a ventilated control cabinet; follow grounding and shielding best practices.
• Safety: Lockout/tagout rotating equipment; confirm runout checks and observe hazardous-area rules when applicable.
• Routine checks: Inspect probe tip and threads for fouling; clean metallic debris; verify bias and amplitude during outages.
• Calibration/updates: System calibration is typically maintained via the Proximitor/monitor; keep monitoring firmware up to date and document any component swaps.

Quality & Certifications

• Conformity: CE and RoHS compliance for most configurations; hazardous-area approvals (e.g., ATEX/IECEx/CSA) are available on specific options.
• Manufacturer standards: Built to BENTLY NEVADA 3300 XL system specifications for accuracy and stability.
• Warranty: 365 days from delivery.

Note: The suffix “-CN” typically denotes a regional/documentation variant. If you need a specific cable length or thread option, share the full code and we’ll confirm configuration and lead time.