Description
1. Product Introduction
The Bently Nevada 330104‑00‑10‑10‑02‑CN is an 8‑mm high‑precision medium‑length‑probe non‑armoured eddy‑current displacement‑vibration sensor (China‑adapted version) from the 3300 XL series. it serves as core original sensing hardware for TSI condition‑monitoring and safety‑protection systems deployed in domestic power, petrochemical and coal‑chemical projects.
This sensor is configured with an M10×1 standard metric mounting thread, a 10‑mm medium‑length unthreaded probe section, ordinary‑protection non‑armoured cable, a 1‑metre factory‑standard‑length cable and CN‑type terminals adapted for domestic‑market connection. Optimised for medium‑depth mounting holes, standard casing‑shield thickness and tidy wiring layouts on large‑and‑medium‑size domestic rotating machinery, it is widely used on core power equipment including turbo‑generator units, gas turbines, centrifugal compressors, large blowers, heavy‑duty industrial pumps and high‑voltage electric motors.
Adopting the proven non‑contact eddy‑current measurement principle with zero physical‑contact wear, the sensor continuously acquires critical operating‑parameters such as radial shaft vibration, axial displacement, shaft eccentricity and key‑phase speed. Built around an industrial‑grade reinforced stainless‑steel housing, it features resistance to wide‑range temperature variation, ageing and oil‑gas corrosion together with excellent electromagnetic‑interference immunity. Its major strengths comprise high‑measurement accuracy, good linear consistency, low temperature drift, superior suitability for medium‑depth measuring‑points, strong compatibility with domestic monitoring‑systems, stable performance and maintenance‑free operation. Capable of withstanding harsh‑site conditions within power‑equipment rooms, such as high temperature‑humidity, oil‑gas dust, persistent mechanical vibration and frequency‑converter electromagnetic interference, it supports 7×24‑hour non‑stop online monitoring. It is well‑suited for new‑build monitoring‑system projects on domestic power units, localisation‑adaptation retrofits of legacy equipment, sensor replacement at conventional medium‑depth measuring‑points and predictive‑maintenance upgrade programmes.
2. Functions and Working Principle
Core Functions
The 330104‑00‑10‑10‑02‑CN integrates six core capabilities: dynamic high‑frequency vibration monitoring for large rotating units, high‑precision static axial‑displacement measurement, shaft‑eccentricity deformation detection, stable key‑phase speed‑signal acquisition, loss‑free signal transmission at medium‑depth measuring‑points and early‑fault prediction for rotating‑machinery. It fully satisfies comprehensive data‑acquisition requirements for condition monitoring, fault diagnosis and safety interlock‑protection of high‑speed heavy‑duty rotating machinery under conventional domestic installation‑conditions.
It captures micron‑level radial‑vibration amplitudes, axial‑displacement offsets and tiny shaft‑deviation values of high‑speed rotors in real‑time, collects round‑the‑clock dynamic operating data, linearly converts mechanical physical‑displacement variables into a standard DC analog‑voltage signal, and reliably transmits data to both Bently 3300 / 3500 monitoring platforms and locally‑adapted domestic TSI systems. It provides high‑precision, highly‑continuous and high‑fidelity data support for diagnosis, trend analysis and interlock trip‑protection against potential failures such as excessive vibration, over‑limit axial displacement, rotor‑stator rub, rotor unbalance, bearing failure and eccentric shaft wear.
Equipped with multi‑stage signal‑filtering and electromagnetic anti‑interference functions, its signal‑processing algorithm is optimised for the complex electromagnetic‑environment found at domestic industrial‑sites. It effectively suppresses signal distortion and data jitter induced by frequency‑converter interference, electromagnetic noise, mechanical resonance and line crosstalk, and mitigates minor signal attenuation and data‑fluctuation problems at medium‑depth mounting‑points. This guarantees full‑time stable‑reliable monitoring data under domestic‑system matching‑conditions and greatly improves operational safety and fault‑prediction accuracy for heavy‑duty rotating‑equipment.
Working Principle
This sensor operates on the principle of high‑frequency non‑contact eddy‑current induction measurement, and must be matched with an original standard‑specification Bently proximitor to form a complete closed‑loop monitoring system.
After high‑frequency alternating‑current is supplied to the high‑precision coil inside the 10‑mm medium‑length probe, a stable, uniform and low‑drift high‑frequency alternating magnetic‑field is generated at the probe tip. When the metallic rotor target enters the magnetic‑field induction zone, closed eddy currents are induced on the metal surface.
The intensity and distribution density of eddy currents change dynamically with the gap distance between probe and target, which inversely modifies electrical parameters of the probe coil including impedance, inductance and output voltage. The sensor detects these subtle electrical variations and applies factory‑calibrated linear‑conversion algorithms dedicated to medium‑length probes to accurately compensate signal‑loss deviations caused by medium‑depth installation. Signal‑transmission matching‑performance is further optimised for CN‑adapted terminals. Physical quantities such as probe‑target gap, vibration displacement and deformation offset are converted into a proportional standard DC‑voltage signal.
The whole measurement process is contact‑free and friction‑free, featuring fast‑response speed and a stable linear range. Subjected to dedicated factory calibration, the 10‑mm medium‑length probe preserves all core‑measurement performance of the standard 8‑mm sensor. Steady‑state static‑displacement monitoring and high‑frequency dynamic‑vibration acquisition can be carried out simultaneously. Combined with the backend monitoring platform, it enables real‑time shaft‑condition tracking, trend logging, over‑limit alarming and interlock trip‑protection, ensuring controllable, stable, safe and compliant long‑term operation of large‑and‑medium‑size rotating power‑machinery installed at medium‑depth measuring‑points under conventional domestic working‑conditions.
3. Technical Features
- M10 thread with 10‑mm medium‑length probe, optimised for conventional medium‑depth domestic measuring‑points: Fitted with a standard 8‑mm measuring probe, M10×1 universal metric mounting thread and 10‑mm medium‑length unthreaded probe segment, it is precisely engineered for domestic‑unit measuring‑points with standard shield thickness and medium‑depth mounting holes. Balancing installation suitability for both shallow and moderately deep locations, it delivers interference‑free installation, precise positioning and secure locking. It is fully compatible with the complete 3300 XL proximitor portfolio, the 3500 monitoring system and domestic TSI platforms. No modification to on‑site bases or monitoring logic is required during replacement, offering excellent versatility suited to the vast‑majority of industrial‑unit measuring‑point layouts in China.
- Factory precision calibration ensuring long‑term high‑accuracy linear‑stable operation: Manufactured with precision‑wound coils and dedicated factory calibration procedures for medium‑length probes, the sensor offers a nominal sensitivity of 7.87 V/mm and a full‑range linear error ≤ 1 %. It achieves extremely‑low temperature drift, effectively preventing measurement‑offset issues commonly encountered on medium‑length probes. Micron‑scale vibration and displacement changes on rotating‑shafts are captured accurately; zero‑parameter degradation and zero‑accuracy offset are maintained during long‑term continuous‑operation, satisfying the high‑precision monitoring‑standards required by domestic power and petrochemical industries.
- 1‑metre non‑armoured cable plus CN‑adapted terminals for domestic standardised‑wiring workflows: Constructed with lightweight flexible non‑armoured shielded cable and special‑purpose CN‑type terminals adapted for domestic‑site connections, it conforms to standard tidy‑wiring practices within equipment‑rooms. The cable is durable, highly flexible during routing and delivers reliable plug‑and‑play compatibility. Suited to conventional industrial‑environments free from severe crushing or tensile stress, its low weight promotes good mounting‑fit and stress‑free cable runs, fully meeting wiring requirements for both new‑build and retrofit power‑units in China.
- Non‑contact loss‑free measurement for extended maintenance‑free service‑life: Contact‑free inductive sensing removes physical friction between probe and rotor, fundamentally avoiding common defects of contact‑type sensors such as high‑speed wear, ageing‑failure and accuracy degradation. The integrated reinforced medium‑length‑probe structure delivers excellent bending‑resistance, deformation‑resistance and fatigue‑resistance. It supports 7×24‑hour non‑stop continuous‑operation of high‑speed, heavy‑duty rotating‑equipment and achieves a far‑longer service‑life than generic domestic alternative sensors.
- Full‑enclosure electromagnetic‑shield design for reliable performance under complex domestic industrial‑conditions: A fully wrapped electromagnetic‑shield structure is equipped with anti‑interference sealed connectors. Having passed high‑grade EMC compliance tests for power and petrochemical industries, it effectively resists intense electromagnetic radiation and line‑crosstalk originating from domestic frequency‑converter drives, electronic‑control systems and dense cable looms. Signals remain free‑from attenuation, distortion and jitter in semi‑enclosed medium‑depth installation‑environments, ensuring precise and stable monitoring data.
- Wide‑temperature corrosion‑resistant design with convenient maintenance for cost‑saving‑efficiency gains: The probe and cable are fabricated from special‑industrial materials resistant to high temperature, oil‑gas and acid‑alkali corrosion for stable operation across a wide‑temperature band, and can endure long‑term exposure to high‑temperature‑humidity, oil‑gas dust and persistent vibration under harsh working‑conditions. As a purely‑passive hardware device, it requires no routine calibration or frequent maintenance. Quick disassembly and replacement are supported; CN‑adapted terminals match conventional on‑site wiring‑procedures, reducing maintenance workload, unit‑downtime losses and achieving low‑cost equipment‑servicing objectives for domestic industrial‑facilities.
4. Specifications
Basic Parameters
Product Model: 330104‑00‑10‑10‑02‑CN Brand & Manufacturer: Bently Nevada Product Series: 3300 XL 8 mm Eddy‑Current Sensor Series Applicable System: Bently 3300 / 3500 Rotating‑Machinery Condition‑Monitoring & Protection System, Domestic TSI Turbine Supervisory‑Instrumentation System Product Type: M10‑thread medium‑length‑probe non‑armoured China‑adapted non‑contact shaft‑vibration and axial‑displacement monitoring sensor Structural Specification: M10×1 standard metric mounting thread, 10‑mm medium‑length unthreaded probe length, ordinary non‑armoured shielded cable, 1‑metre factory‑standard‑length cable, CN‑type terminal connector adapted for domestic‑market connection Applicable Standards: API 670 Machinery‑Protection Standard, IEC Industrial‑EMC Standard, Domestic‑industry monitoring specifications for power‑and‑petrochemical sectors, Bently‑Nevada factory precision‑measurement specifications Primary Purpose: Radial shaft‑vibration, axial‑displacement, shaft‑eccentricity and key‑phase speed monitoring for rotating‑units at conventional medium‑depth measuring‑points under domestic working‑conditions; standard‑point data acquisition, equipment fault diagnosis, machinery safety interlock‑protection and predictive‑maintenance data support
Core‑Performance Parameters
Operating Principle: High‑frequency eddy‑current induction measurement, dual‑mode monitoring for dynamic vibration + static displacement Probe Specification: Standard 8‑mm measuring probe, 10‑mm medium‑length unthreaded section, M10×1 metric mounting thread Nominal Sensitivity: 7.87 V/mm (200 mV/mil) Linear Measurement Range: 0.25 mm ~ 2.3 mm (10 ~ 90 mils) Recommended Installation Gap: 1.27 mm (50 mils) Frequency Response: 0 Hz ~ 10 kHz, supporting high‑precision high‑frequency vibration‑signal acquisition for machinery Linearity Accuracy: Full‑range linear error ≤ 1 %, zero‑parameter drift and zero‑accuracy degradation during long‑term operation, excellent measurement consistency for medium‑depth installation Output Signal: Standard DC analog‑voltage signal, compatible with high‑precision data acquisition and interpretation by both domestic and overseas monitoring‑systems
Electrical Parameters
Power Supply: Powered via original standard‑specification proximitor, −17.5 VDC ~ −26 VDC Maximum Operating Current: 12 mA Immunity Grade: High‑level EMI/RFI electromagnetic shielding, resistant to domestic industrial high‑frequency interference, frequency‑converter interference and conventional measuring‑point signal‑disturbance Measurement Characteristics: Dual‑mode high‑precision output for high‑frequency dynamic‑vibration acquisition and steady‑state static‑displacement measurement, outstanding measurement stability of medium‑length probe, high signal‑transmission matching‑performance with CN‑adapted terminals
Mechanical & Physical Parameters
Structural Features: M10 standard‑metric‑thread probe, 10‑mm medium‑length universal medium‑depth section, reinforced stainless‑steel housing, 1‑metre non‑armoured shielded cable, CN‑adapted sealed connector, anti‑vibration reinforced integrated construction Mounting Method: M10 thread‑locked fixed installation, suitable for medium‑depth standard‑thread measuring‑point layouts on domestic power‑units with conventional‑thickness equipment‑shields Maintenance Characteristics: No routine calibration or frequent maintenance required; deformation‑resistant probe, easy disassembly and wiring, compatible with domestic on‑site servicing workflows, supporting fast‑swap maintenance at conventional medium‑depth measuring‑points
Environmental Parameters
Probe Operating Temperature: −52 ℃ ~ +177 ℃ Cable Operating Temperature: −52 ℃ ~ +177 ℃ Storage Temperature: −60 ℃ ~ +200 ℃ Relative Humidity: 5 %‑95 % RH, non‑condensing Environmental Resistance: Immunity to strong electromagnetic interference and mechanical vibration; oil‑gas‑corrosion‑resistant, high‑temperature‑humidity‑resistant, dust‑proof and anti‑vibration, stable operation at medium‑depth measuring‑points, suitable for 7×24‑hour continuous on‑line monitoring of domestic industrial machinery
5. Application Scenarios
The Bently Nevada 330104‑00‑10‑10‑02‑CN sensor is custom‑adapted for domestic industrial‑project operating‑conditions. It is widely deployed in TSI condition‑monitoring systems for high‑speed heavy‑duty rotating power‑machinery fitted with standard‑thickness equipment‑shields, medium‑depth measuring‑points and tidy standardised wiring layouts, including thermal‑power plants, gas‑fired combined‑cycle stations, petrochemical refining facilities, coal‑chemical plants, oil‑gas transmission terminals and heavy‑industry captive‑power stations. It constitutes core adapted sensing hardware for fault prediction, safety interlock‑protection and stable‑operation maintenance of large rotating‑equipment under general‑purpose medium‑depth measuring‑point scenarios in China.
Typical applications include round‑the‑clock shaft‑vibration and axial‑displacement monitoring at medium‑depth measuring‑points with conventional shields on domestic turbo‑generator units; high‑precision shaft‑eccentricity deformation and key‑phase speed acquisition at standard‑depth installation locations of gas turbines; condition monitoring of large‑and‑medium‑size centrifugal compressors under conventional working‑conditions; dynamic‑parameter acquisition at medium‑depth measuring‑points for large‑scale industrial induced‑draught fans, forced‑draught fans and circulating‑water pumps; hardware fitting for standard‑thread measuring‑points on domestic power‑units; localisation‑adaptation replacement of legacy imported sensors; accuracy‑upgrade retrofits for monitoring‑systems at conventional‑depth measuring‑points; unattended on‑line monitoring of power‑equipment; vibration‑anomaly fault diagnosis and trend analysis at medium‑depth machinery measuring‑points; compliance‑monitoring hardware for domestic rotating‑machinery monitoring‑systems; and data acquisition for predictive maintenance of industrial equipment.
As a dedicated high‑precision eddy‑current sensor within the 3300 XL series (M10 thread, 10‑mm medium‑length unthreaded probe, 1‑metre non‑armoured cable, CN‑adapted terminals), it perfectly matches domestic‑equipment measuring‑point layouts, national wiring‑standards and on‑site wiring‑procedures, combining original‑equipment quality with local‑connection compatibility. It addresses well‑known industry‑wide drawbacks of conventional imported sensors: poor wiring compatibility, high‑cost retrofits and insufficient site‑condition suitability. It mitigates risks of unplanned shutdown, component damage and safety incidents triggered by shaft rub, rotor unbalance, bearing failure, over‑limit displacement and other faults at medium‑depth measuring‑points, and comprehensively guarantees long‑term safe, stable, efficient and compliant operation of large‑and‑medium‑size rotating power‑machinery under general‑purpose domestic working‑conditions. It is the preferred original‑equipment core sensor for new‑system deployment, localisation retrofits of legacy imported‑equipment and fault‑repair maintenance projects of rotating‑machinery condition‑monitoring systems for conventional medium‑depth measuring‑points across Chinese‑industry sites.
