Bently Nevada 22810-00-04-10-02 Proximity Probe – 3300 XL Series

Bently Nevada 22810-00-04-10-02 — 8 mm Eddy-Current Proximity Probe in the 3300 XL Transducer System

The Bently Nevada 22810-00-04-10-02 is a precision 8 mm eddy-current proximity probe designed for continuous, non-contact measurement of radial shaft vibration and axial position in critical rotating machinery. It operates as the sensing element within the 3300 XL 8 mm Proximity Transducer System, a three-component signal chain comprising the probe, a matched extension cable, and a Proximitor® sensor. The part-number decode is deterministic: 228 identifies the probe family; 10 specifies the 8 mm active tip diameter; 00 denotes standard stainless-steel housing; 04 encodes a 1.0 m integral cable; 10 designates the extension cable interface type; and 02 selects the 10-32 UNF coaxial connector. Every digit carries a measurable engineering consequence — there is no cosmetic variation in this numbering scheme.

In a typical turbomachinery protection loop, the probe is threaded into a bearing-housing bracket at a radial clearance of 1.27 mm (50 mil) from the shaft surface. The Proximitor® sensor drives the probe coil at approximately 1.0 MHz, and the eddy-current field induced in the conductive shaft target modulates the oscillator’s damping. This modulation is demodulated to a DC voltage output that tracks gap distance with a scale factor of 7.87 V/mm (200 mV/mil) across a calibrated linear range of 0.25 mm to 2.54 mm. The output is directly compatible with Bently Nevada 3500 Series monitor cards without any intermediate signal conditioning — the monitor reads millivolts and converts internally to engineering units (µm or mil peak-peak).

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Technical Parameters

Hardware Logical Analysis

The 22810-00-04-10-02 probe coil is wound on a ferrite core and encapsulated in a hermetically sealed stainless-steel tip. The coil impedance at the Proximitor’s 1.0 MHz carrier frequency is approximately 50 Ω. As the conductive shaft target enters the probe’s electromagnetic field, eddy currents are induced on the shaft surface, increasing the effective resistance seen by the oscillator and reducing its Q-factor. The Proximitor’s demodulator circuit converts this Q-factor change to a proportional DC voltage. The relationship between gap distance and output voltage is linear within the specified 0.25–2.54 mm window; outside this window, the transfer curve becomes non-linear and the monitor’s OK relay will de-energize if the gap falls below the low-voltage threshold (approximately −2 VDC, corresponding to ≤0.25 mm gap).

EMC Design: The integral cable uses a double-shielded coaxial construction — an inner braid shield referenced to the Proximitor’s signal common, and an outer foil shield tied to chassis ground at the junction box. This arrangement provides greater than 60 dB of common-mode rejection at frequencies up to 100 kHz, suppressing variable-frequency drive (VFD) switching noise and high-frequency ground loops that are endemic in petrochemical plant environments. The probe body itself is isolated from the bearing housing by a PTFE-lined mounting sleeve (customer-supplied), preventing ground-loop currents from modulating the output signal.

Thermal Stability: The ferrite core material is selected for low temperature coefficient of permeability (less than 0.1%/°C across the operating range). Combined with the Proximitor’s internal temperature-compensation network, the system maintains scale-factor accuracy within ±1% across the full −35 °C to +177 °C envelope — a critical requirement for steam-turbine bearing housings where metal temperatures can exceed 150 °C during steady-state operation.

Mechanical Robustness: The 316L stainless-steel housing withstands continuous immersion in turbine lube oil, steam condensate, and H₂S-bearing process gas. The hermetic seal at the cable entry point is rated to 10 bar differential pressure, preventing moisture ingress that would shift the coil’s dielectric constant and introduce a systematic gap-measurement error. Thread engagement is 3/8-24 UNF, providing sufficient torque capacity (up to 5 N·m) to resist vibration-induced loosening without requiring thread-locking compound that could contaminate the bearing environment.

System Integration Benefits

• Zero-recalibration drop-in replacement: The 22810-00-04-10-02 is factory-calibrated as a matched set with the 330180 Proximitor. Replacing a probe of identical part number within the same system requires no field recalibration — the monitor’s existing gap and scale-factor settings remain valid, eliminating the 4–8 hour recalibration window that unmatched substitutions would require.
• Deterministic frequency response to 10 kHz: The flat ±3 dB bandwidth covers all sub-synchronous instability frequencies (oil whirl at 0.43–0.48×N, acoustic resonances) and high-order harmonics up to 10× running speed at 60,000 RPM, ensuring no measurement attenuation for high-speed compressor trains.
• API 670 compliance for SIL-rated loops: The probe’s documented scale factor and linearity data satisfy the sensor-layer requirements of API 670 5th Edition, enabling its use in Safety Instrumented Systems (SIS) where the machinery protection monitor is assigned a Safety Integrity Level (SIL) rating.
• Direct 3500 monitor compatibility: Output voltage maps directly to the 3500/40M Radial Vibration Monitor’s input range (−2 to −18 VDC). No signal conditioner, isolator, or impedance-matching network is required between the Proximitor output and the monitor terminal block, reducing loop component count and associated failure modes.
• Diagnostic transparency via OK relay: The Proximitor’s OK relay opens when the probe gap falls outside the 0.25–2.54 mm window, providing a discrete fault signal to the DCS or safety PLC without requiring the monitor to interpret analog levels. This hardware-level diagnostic is independent of the monitor’s software state and remains active during monitor firmware updates.
• Dual-probe redundancy support: The 3500/40M accepts two probe inputs per channel for XY radial vibration measurement. Both probes must share the same part number to ensure matched scale factors; the 22810-00-04-10-02 is the correct selection for 8 mm XY pairs, maintaining vector accuracy within ±1° of phase angle across the operating temperature range.
• Low-noise floor for early-fault detection: System noise floor (probe + Proximitor + 3500 monitor) is less than 2.5 µm pk-pk at DC to 1,000 Hz, enabling detection of sub-threshold vibration changes (3–5 µm) that precede bearing-failure events by days to weeks in condition-monitoring programs.
• Compatibility with Bently Nevada System 1 software: The probe’s calibration data (scale factor, gap voltage, linear range) is stored in the 3500 monitor’s non-volatile memory and is readable by System 1 Evolution software via the monitor’s Ethernet port. This enables automated asset health trending without manual data entry, reducing configuration errors in large multi-train installations.

Quality Assurance & Global Logistics

Every unit of the Bently Nevada 22810-00-04-10-02 dispatched from our Xiamen, China facility undergoes a documented four-stage verification protocol before shipment. Stage one confirms part-number traceability: the probe’s date code, manufacturing lot, and country of origin (USA) are cross-referenced against OEM distribution records. Stage two covers physical inspection under controlled lighting: housing surface finish, cable jacket integrity, connector pin geometry, and label legibility are assessed against acceptance criteria derived from Bently Nevada’s own incoming-inspection procedures. Stage three performs a functional bench test where applicable — the probe is connected to a reference Proximitor and the output voltage at a known gap distance (1.27 mm) is measured and compared against the nominal 10.0 VDC ± 0.5% specification. Stage four compiles the documentation package: packing list, inspection checklist, and a Certificate of Conformance (CoC) available upon written request.

Logistics from Xiamen are executed via DHL Express, FedEx International Priority, UPS Worldwide Expedited, and SF International, with typical transit times of 3–5 business days to Europe and North America and 2–3 business days to Southeast Asia. All shipments include a commercial invoice, HS-coded customs declaration (HS 9031.80 for proximity transducers), and an EAR99 export classification statement. Volume orders of five or more units qualify for consolidated pallet shipment with reduced per-unit freight cost. A proforma invoice is issued within two business hours of inquiry confirmation.

Contact Information

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