Bently Nevada 330910-00-19-10-02-00 Proximity Probe – 3300 NSv Series

Bently Nevada 330910-00-19-10-02-00: 8mm Eddy-Current Proximity Probe in the 3300 NSv Continuous Monitoring Architecture

The Bently Nevada 330910-00-19-10-02-00 is an 8mm eddy-current proximity probe belonging to the 3300 NSv Series — a platform engineered specifically for non-contact, continuous shaft vibration and position measurement on critical rotating machinery. Within a complete 3300 NSv measurement chain, this probe functions as the primary transducer: it converts mechanical displacement of a conductive target into a proportional DC voltage signal, which is then conditioned by a matched Proximitor sensor and transmitted to a 3300 XL or 3500 Series monitoring rack for real-time analysis and alarm arbitration.

The probe’s 8mm tip diameter defines its linear measurement range and sensitivity coefficient. At this diameter, the eddy-current field geometry produces a calibrated sensitivity of 7.87 V/mm (200 mV/mil) across a linear range of 0.25 mm to 2.25 mm (10 to 90 mil). This range is sufficient to capture both steady-state shaft centerline position and dynamic vibration amplitudes up to the full API 670 alarm and danger thresholds for most turbomachinery classes. The probe is factory-calibrated against AISI 4140 steel targets; installations using alternative shaft materials require a system sensitivity correction factor per Bently Nevada Application Note 141.

The part number suffix -00-19-10-02-00 encodes the probe’s physical configuration: 19 dm (1.9 m) integral cable, standard armored jacket, and a 02-series connector termination compatible with the 330130-Series extension cable. The total measurement chain cable length — probe integral cable plus extension — must be matched to the Proximitor’s calibrated range; the 19 dm probe pairs with a 5.0 m extension to achieve the standard 8.0 m system length required for nominal sensitivity.

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Technical Parameters

Hardware Logical Analysis

The 330910-00-19-10-02-00 operates on the two-coil eddy-current principle. The probe tip houses a wound coil driven by a high-frequency oscillator (typically 1.0 MHz carrier) embedded in the paired Proximitor sensor. When the probe tip approaches a conductive target, the oscillating magnetic field induces eddy currents in the target surface. These eddy currents generate a counter-magnetic field that loads the probe coil, reducing oscillator amplitude in proportion to the gap distance. The Proximitor demodulates this amplitude-modulated signal and outputs a linear DC voltage: gap increases produce more negative output, gap decreases produce less negative output, with the slope defined by the 7.87 V/mm sensitivity coefficient.

EMC and Shielding Architecture: The integral cable uses a triaxial construction — inner conductor, inner shield (driven at oscillator potential to eliminate cable capacitance effects), and outer shield (grounded for EMC). This driven-shield topology eliminates the cable capacitance as a variable, ensuring that cable routing through high-EMI environments (VFD cabinets, bus ducts, high-current conductors) does not introduce sensitivity drift or noise floor degradation. The outer armor jacket provides mechanical protection against abrasion and crush loads in turbine pedestals and compressor skids.

Thermal Stability: The probe coil former and potting compound are selected for low thermal coefficient of expansion. Over the full –35°C to +177°C operating range, sensitivity variation is maintained within ±1% of nominal — a critical requirement for hot-section turbine bearing housings where ambient temperatures can exceed 150°C during sustained operation. The armored cable jacket uses a fluoropolymer insulation rated for continuous service at these temperatures without plasticizer migration or insulation resistance degradation.

Mechanical Integration: The 8mm probe body uses a standard M10 × 1.0 thread for mounting in probe holders. The thread engagement length and locknut torque specification (per Bently Nevada Installation Manual 141193) are critical: under-torqued installations allow probe migration under vibration, introducing a DC offset error; over-torqued installations risk thread galling in stainless probe holders. The probe tip-to-target gap is set during commissioning using a calibrated gap tool, with the nominal gap of 1.0 mm (40 mil) placing the operating point at the center of the linear range for maximum dynamic headroom in both directions.

System Integration Benefits

• Direct API 670 Compliance: The 330910-00-19-10-02-00 is designed and documented to meet API 670 5th Edition requirements for non-contacting vibration transducer systems, eliminating the need for third-party compliance verification during plant audits.
• Zero Mechanical Wear: Non-contact measurement eliminates bearing load from the transducer, removing a failure mode present in contacting displacement sensors. Mean time between replacement is determined by environmental factors (temperature, contamination) rather than mechanical fatigue.
• Deterministic Frequency Response: The flat frequency response from DC to 10 kHz captures both 1× and 2× running speed components for machines operating up to 600,000 RPM equivalent, as well as sub-synchronous instability events (oil whirl, oil whip) that typically manifest at 0.43–0.48× running speed.
• Seamless 3300 XL / 3500 Rack Integration: The probe’s output is directly compatible with Bently Nevada 3300 XL and 3500 Series monitor cards without signal conditioning adapters. Rack configuration requires only entry of the probe/extension cable combination and target material correction factor.
• Dual-Use Measurement Capability: A single probe installation simultaneously provides radial vibration (AC component) and shaft centerline position (DC component) data to the monitoring rack, reducing the number of penetrations required in the bearing housing compared to separate vibration and position transducer installations.
• Hazardous Area Deployment: When used with an approved Bently Nevada Zener barrier, the system achieves ATEX Zone 1 / IECEx certification, permitting installation in gas-group IIC environments without additional intrinsic safety relays or galvanic isolators in the signal path.
• Diagnostic Transparency via Gap Voltage Monitoring: The DC gap voltage output provides a continuous, real-time indicator of probe-to-target gap. Trending this value over time reveals shaft centerline migration due to bearing wear, thermal growth, or alignment shift — enabling condition-based maintenance scheduling before vibration alarm thresholds are reached.
• Standardized Spare Parts Inventory: The 330910-00-19-10-02-00 is a widely deployed standard configuration across the 3300 NSv product family. Stocking this part number covers the majority of 8mm probe replacement requirements across mixed-vintage 3300 and 3500 Series installations, reducing spare parts SKU proliferation in plant warehouses.

Quality Assurance & Global Logistics

Every Bently Nevada 330910-00-19-10-02-00 unit supplied by siemensplc.com is sourced through verified OEM and authorized surplus channels. Prior to dispatch from our Xiamen, China facility, each probe undergoes a four-stage inspection protocol: label and date-code authentication, connector and cable jacket integrity check, coil resistance measurement to confirm winding continuity, and packaging inspection to ensure anti-static and mechanical protection is intact. Units failing any stage are quarantined and not offered for sale.

Logistics from Xiamen are handled via DHL Express and FedEx International Priority, with typical transit times of 3–5 business days to major industrial hubs in Southeast Asia, the Middle East, and Europe. For North American destinations, transit is typically 5–7 business days. Full export documentation is provided with every shipment: commercial invoice, packing list, certificate of origin, and HS Code 9031.80 classification. For orders requiring a certificate of conformance (CoC) or material traceability documentation, these are prepared at time of order confirmation. A 12-month warranty covers defects in materials and workmanship from the date of shipment.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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