Bently Nevada 330196-05-30-10-00 Proximity Probe – 3300 XL ETR

Bently Nevada 330196-05-30-10-00 — ETR Reverse Mount Proximity Probe in the 3300 XL Transducer System

The 330196-05-30-10-00 is a factory-configured proximity probe within Bently Nevada’s 3300 XL transducer family, designated for reverse-mount installations in extended-temperature environments. Its part number encodes the full mechanical and electrical configuration: 5 mm probe body length, 30 cm integral cable, standard 10-32 UNF coaxial termination, and the ETR (Extended Temperature Range) material and insulation package. This is not a general-purpose vibration sensor — it is a precision eddy-current transducer engineered to maintain sub-micron displacement resolution in ambient conditions that exceed the thermal envelope of standard 3300 XL probes.

In rotating machinery protection architectures governed by API 670, the proximity probe is the primary sensing element for radial shaft displacement, axial position, and differential expansion. The 330196-05-30-10-00 feeds a continuous analog signal — nominally –200 mV/mil (–7.87 V/mm) — to a matched 3300 XL Proximitor® sensor, which conditions the signal before transmission to a Bently Nevada 3500 Series monitor rack. The entire measurement chain from probe tip to monitor output must be treated as a calibrated system; substituting any element outside the matched configuration introduces gain error and invalidates the API 670 calibration record.

The reverse-mount geometry addresses a specific mechanical constraint common in high-speed turbomachinery: bearing housings where the probe must be inserted from the non-process side of the casing. This is standard practice in many OEM compressor and turbine designs where the process-side access is sealed or thermally isolated. The 330196-05-30-10-00 threads into the housing from the back, with the probe tip oriented toward the shaft journal, maintaining the required 1.0 mm nominal air gap for linear measurement range operation.

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Technical Parameters

Hardware Logical Analysis

The operating principle of the 330196-05-30-10-00 is based on the eddy-current effect: a high-frequency oscillator within the Proximitor® sensor drives an alternating magnetic field through the probe coil. When a conductive target (shaft journal) enters the field, eddy currents are induced on the target surface, loading the oscillator circuit and reducing coil impedance. The Proximitor® converts this impedance change into a DC voltage proportional to the gap distance between probe tip and shaft surface.

The ETR designation reflects a specific material and construction upgrade over standard 3300 XL probes. The coil winding uses a higher-temperature magnet wire insulation class, and the cable jacket compound is rated for sustained elevated ambient exposure without plasticizer migration or dielectric degradation. This matters because any change in cable capacitance or coil resistance shifts the oscillator frequency and alters the scale factor — directly corrupting the displacement measurement. In a standard probe operating above its thermal rating, this drift is silent: the monitor continues to display a value, but the calibration is no longer valid.

The reverse-mount configuration introduces a specific installation geometry consideration. Because the probe is inserted from the back of the housing, the integral cable exits in the opposite direction from a standard probe. This affects cable routing, conduit entry points, and the mechanical stress profile on the cable-to-probe junction. Bently Nevada’s integral cable design on the 330196 series uses a strain-relief boot at the probe body exit to manage bending radius under vibration, preventing fatigue cracking at the highest-stress point in the assembly.

EMC performance is a function of the coaxial cable shield continuity from probe tip to Proximitor® input. The 10-32 UNF connector on the 330196-05-30-10-00 provides a 360° shield termination at the junction with the extension cable, eliminating the shield gap that would otherwise act as an antenna for radiated interference. In environments with high-frequency switching drives or arc furnaces nearby, this shield integrity is the primary defense against common-mode noise injection into the measurement signal.

System Integration Benefits

• Deterministic signal latency: The analog output of the 330196-05-30-10-00 reaches the 3500 monitor with no digital conversion delay in the probe-to-Proximitor® path, preserving the sub-millisecond response time required for overspeed and high-vibration trip logic.
• Calibration traceability: Each 3300 XL probe is factory-calibrated as part of a matched system. The calibration record ties the probe serial number to a specific Proximitor® gain setting, supporting plant maintenance documentation and audit requirements.
• Direct replacement compatibility: The 330196-05-30-10-00 shares the same thread form, connector, and electrical interface as other 330196 series probes, reducing spare parts inventory complexity and eliminating re-engineering during maintenance windows.
• Diagnostic transparency: The 3500 monitor’s OK relay and gap voltage outputs allow continuous health monitoring of the probe-Proximitor® system. A probe coil short or open circuit produces a predictable out-of-range gap voltage, triggering a NOT OK condition before the measurement is used for protection decisions.
• Multi-parameter measurement: A single 330196-05-30-10-00 installation can simultaneously provide radial vibration (AC component) and shaft centerline position (DC component) data to the 3500 monitor, reducing the total probe count required per bearing.
• Thermal stability across load cycles: The ETR construction maintains scale factor within the ±1% tolerance band across the full operating temperature range, ensuring that alarm and trip setpoints remain accurate without temperature-compensated correction factors in the monitor configuration.
• Reduced commissioning risk: Plug-and-play compatibility with the 3300 XL Proximitor® eliminates field calibration of the probe-sensor pair. The matched system is verified at the factory; the installer sets only the gap voltage at the nominal air gap.
• Long-term availability: The 3300 XL series is a mature, widely deployed platform. Replacement probes, extension cables, and Proximitor® sensors remain available through authorized channels, protecting the long-term serviceability of the machinery protection system.

Quality Assurance & Global Logistics

Every 330196-05-30-10-00 unit supplied by siemensplc.com is sourced through verified industrial supply channels. Prior to shipment, each probe undergoes a physical inspection covering connector integrity, cable jacket condition, probe tip surface, and label authenticity. Units showing any evidence of rework, re-marking, or non-original packaging are rejected and not offered for sale.

Our warehouse is located in Xiamen, China — a major international logistics hub with direct access to DHL Express, FedEx International Priority, UPS Worldwide Express, and sea freight consolidation services. Standard export documentation — commercial invoice, packing list, and certificate of origin — is prepared for every shipment. For orders requiring additional documentation (material test reports, certificates of conformance, or customs pre-clearance paperwork), please specify requirements at the time of RFQ.

Typical DHL Express transit times from Xiamen: 2–3 business days to Southeast Asia, 3–5 business days to Europe and the Middle East, 4–6 business days to North America. All shipments are fully insured and tracked from dispatch to delivery. A 12-month warranty covers manufacturing defects under normal operating conditions.

Contact Information

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