Description
1. Product Introduction
The Bently Nevada 330103‑00‑07‑05‑02‑05 is an 8‑mm high‑precision short‑probe armoured high‑temperature‑resistant eddy‑current displacement‑vibration sensor within the 3300 XL series. it serves as original core sensing hardware for TSI condition‑monitoring and safety‑protection systems of large rotating power‑equipment.
This sensor is configured with an M10×1 standard mounting thread, a 7‑mm short unthreaded probe section, a wear‑resistant fully‑metal‑armoured cable, a 5‑metre factory‑supplied extended‑length cable and high‑temperature‑adapted terminals. It is engineered for high‑speed heavy‑duty rotating machinery featuring limited mounting‑point space, compact equipment housings, long wiring distances, high‑temperature and high‑vibration operating‑conditions, and dense oil‑gas dust. It is widely applied on core power units, including large‑and‑medium‑size steam turbines, gas turbines, centrifugal compressors, blowers, heavy‑duty industrial pumps and large electric motors.
Adopting the proven non‑contact eddy‑current measurement principle with zero physical‑contact wear, the sensor can continuously and reliably collect critical operating‑parameters such as radial shaft vibration, axial displacement, shaft eccentricity and key‑phase speed. Constructed with a thickened reinforced stainless‑steel housing and industrial‑special materials resistant to high temperature, ageing and oil‑gas corrosion, it delivers core advantages: high‑measurement accuracy, excellent linearity, ultra‑low high‑temperature drift, stable long‑distance signal transmission, strong mechanical‑damage resistance and superior suitability for confined measuring‑points. It reliably withstands harsh‑site conditions inside power‑equipment rooms, such as high‑temperature‑humidity, oil‑gas erosion, continuous mechanical shock, intense frequency‑converter electromagnetic interference and long‑distance wiring losses, supporting 7×24‑hour non‑stop online monitoring. It is suitable for new‑build monitoring‑system deployment for confined measuring‑points with long‑distance cabling, original‑equipment replacement of aged armoured sensors, monitoring‑upgrade projects for compact high‑temperature locations and predictive‑maintenance retrofits across power, petrochemical, coal‑chemical, oil‑gas storage‑transportation, heavy‑industry and other sectors.
2. Functions and Working Principle
Core Functions
The 330103‑00‑07‑05‑02‑05 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 over 5‑metre cables and early‑fault prediction for abnormal equipment conditions at high‑temperature confined measuring‑points. It fully satisfies comprehensive data‑acquisition requirements for condition monitoring, fault diagnosis and safety interlock protection of high‑speed heavy‑duty rotating machinery under high‑temperature, long‑cable‑routing and compact‑measuring‑point 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, achieves stable loss‑free transmission over a 5‑metre distance, and transmits data reliably to Bently 3300 and 3500 monitoring systems. It provides high‑precision, highly‑continuous and high‑fidelity data support for diagnosis, trend analysis and interlock trip protection against potential failures occurring during high‑temperature equipment‑operation, such as excessive vibration, over‑limit axial displacement, rotor‑stator rub, rotor unbalance, thermal‑induced bearing failure and eccentric shaft wear.
Equipped with built‑in multi‑stage signal‑filtering and high‑temperature anti‑interference mechanisms, the sensor’s signal‑processing algorithm is optimised for long‑cable transmission and enclosed confined measuring‑points. It effectively eliminates signal distortion and data jitter caused by long‑distance‑line crosstalk, high‑temperature electromagnetic noise, mechanical resonance and frequency‑converter interference, and resolves long‑cable signal attenuation and signal‑fluctuation issues at enclosed measuring‑points. This guarantees full‑time stable and reliable monitoring data under high‑temperature confined‑site 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 5‑metre‑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 7‑mm short probe, a stable, uniform and high‑temperature‑drift‑resistant 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 adapted for high‑temperature environments to accurately compensate signal‑deviation losses introduced by high‑temperature conditions and long‑distance transmission. 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 7‑mm short 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 heavy‑duty rotating power‑machinery installed at high‑temperature confined measuring‑points with long‑distance wiring.
3. Technical Features
- M10 thread with 7‑mm ultra‑short unthreaded section, optimised for confined compact measuring‑points: Fitted with a standard 8‑mm measuring probe, M10×1 universal mounting thread and 7‑mm short unthreaded probe segment, it is specially‑designed for confined installation scenarios characterised by narrow mounting‑space, compact equipment housings and minimal spacing between measuring‑points. It delivers interference‑free installation, precise positioning and secure locking. It is fully compatible with the complete 3300 XL proximitor portfolio and the 3500 monitoring system, and requires no modification to on‑site bases or monitoring logic during replacement, making it the preferred model for retrofits at confined measuring‑points.
- High‑temperature low‑drift design ensuring long‑term high‑accuracy stable operation: Manufactured with special high‑temperature‑resistant precision‑wound coils and dedicated factory high‑temperature calibration procedures, the sensor offers a nominal sensitivity of 7.87 V/mm and a full‑range linear error ≤ 1 %. It features extremely‑low temperature drift under high‑temperature conditions, captures micron‑scale vibration and displacement changes on rotating shafts accurately, prevents measurement offset and data distortion at elevated temperatures, and maintains zero‑parameter degradation and zero‑accuracy offset during long‑term continuous‑operation to satisfy year‑round high‑temperature unattended monitoring requirements for rotating units.
- 5‑metre fully‑armoured cable suited for complex long‑distance wiring conditions: Constructed with a full‑metal‑armour reinforced protective structure paired with a 5‑metre extended‑dedicated cable, this cable exhibits superior tensile‑pull‑resistance, crush‑resistance, bending‑resistance and mechanical‑shock‑resistance compared with ordinary non‑armoured cables. It performs reliably under high‑load site‑conditions, such as cross‑area long‑distance cabling, complex cable‑tray routing, mechanical squeezing surrounding equipment and high‑temperature exposure, eliminating failures caused by long‑distance signal attenuation, cable damage and ageing, and greatly enhancing wiring flexibility and overall service‑life of the monitoring assembly.
- Non‑contact loss‑free measurement for extended maintenance‑free service‑life under high‑temperature conditions: Contact‑free inductive sensing removes physical friction between probe and rotor, fundamentally avoiding common defects of contact‑type sensors such as high‑speed wear, high‑temperature ageing‑failure and accuracy degradation. The integrated reinforced short‑probe structure delivers excellent deformation‑resistance and high‑temperature 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 conventional sensors.
- Dual‑layer full‑enclosure electromagnetic‑shield design for distortion‑free long‑distance signal transmission: A dual‑layer comprehensive electromagnetic‑protection structure is equipped with an original high‑temperature‑resistant anti‑interference connector. Having passed high‑grade EMC compliance tests for power and petrochemical industries, it effectively resists intense electromagnetic radiation inside high‑temperature equipment‑rooms, frequency‑converter interference, long‑distance line‑crosstalk and mechanical resonance. Signals can be transmitted over the full 5‑metre cable length with zero attenuation, distortion‑free and jitter‑free for precise and stable monitoring data at enclosed confined measuring‑points.
- Wide‑temperature corrosion‑resistant design with convenient maintenance for cost‑saving‑efficiency gains: The probe and armoured cable are fabricated from special‑industrial materials resistant to high temperature, oil‑gas and acid‑alkali corrosion for stable operation across an extra‑wide temperature band, and can endure long‑term exposure to high‑temperature heating, high‑humidity condensation, 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 simplify servicing, resolve difficult‑access maintenance‑challenges at high‑temperature confined measuring‑points, reduce maintenance workload and downtime‑related losses.
4. Specifications
Basic Parameters
Product Model: 330103‑00‑07‑05‑02‑05 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, TSI Turbine Supervisory‑Instrumentation System Product Type: M10‑thread short‑probe armoured high‑temperature‑resistant non‑contact shaft‑vibration and axial‑displacement monitoring sensor Structural Specification: M10×1 standard mounting thread, 7‑mm short unthreaded probe length, fully‑metal‑armoured protective cable, 5‑metre factory‑supplied extended‑length cable, high‑temperature‑resistant sealed terminal connector Applicable Standards: API 670 Machinery‑Protection Standard, IEC Industrial‑EMC Standard, Bently‑Nevada factory high‑temperature precision‑measurement specifications Primary Purpose: Radial shaft‑vibration, axial‑displacement, shaft‑eccentricity and key‑phase speed monitoring for rotating units at compact confined measuring‑points under high‑temperature and long‑distance wiring conditions; long‑cable data acquisition, high‑temperature 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, 7‑mm short unthreaded section, M10×1 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 high‑temperature operation, excellent measurement consistency for long‑distance cable transmission Output Signal: Standard DC analog‑voltage signal, loss‑free transmission supported over 5‑metre cable, compatible with high‑precision system acquisition and interpretation
Electrical Parameters
Power Supply: Powered via original 5‑metre‑specification proximitor, −17.5 VDC ~ −26 VDC Maximum Operating Current: 12 mA Immunity Grade: High‑level EMI/RFI dual‑layer electromagnetic shielding, resistant to industrial high‑frequency interference, long‑cable crosstalk and signal disturbance at enclosed measuring‑points Measurement Characteristics: Dual‑mode high‑precision output for high‑frequency dynamic‑vibration acquisition and steady‑state static‑displacement measurement, outstanding measurement stability under combined high‑temperature and long‑cable conditions
Mechanical & Physical Parameters
Structural Features: M10 standard‑thread probe, 7‑mm short compact‑fit section, thickened reinforced stainless‑steel housing, 5‑metre fully‑armoured wear‑resistant corrosion‑proof cable, high‑temperature‑resistant sealed connector, anti‑vibration crush‑resistant reinforced integrated construction Mounting Method: M10 thread‑locked fixed installation, suitable for confined‑space standard‑thread measuring‑point layouts Maintenance Characteristics: No routine calibration or frequent maintenance required; damage‑resistant probe, easy disassembly for fast‑swap servicing at high‑temperature confined 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, mechanical crushing and pulling forces; oil‑gas‑corrosion‑resistant, high‑temperature‑heating‑resistant, dust‑proof and anti‑vibration, stable long‑cable transmission, suitable for 7×24‑hour continuous on‑line monitoring of industrial machinery at high‑temperature confined measuring‑points
5. Application Scenarios
The Bently Nevada 330103‑00‑07‑05‑02‑05 sensor is widely deployed in TSI condition‑monitoring systems for high‑speed heavy‑duty rotating power‑machinery with confined measuring‑point space, compact equipment layouts, high‑temperature working‑conditions and long‑distance wiring routes, 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 armoured sensing hardware for fault prediction, safety interlock protection and stable‑operation maintenance of large rotating‑equipment under confined‑point, high‑temperature and long‑cable installation scenarios.
Typical applications include round‑the‑clock shaft‑vibration and axial‑displacement monitoring at compact confined measuring‑points of turbo‑generator sets under high‑temperature environments; high‑precision shaft‑eccentricity deformation and key‑phase speed acquisition at high‑temperature confined‑space locations of gas turbines; condition monitoring of centrifugal compressors installed inside compact housings under high‑temperature heavy‑load conditions in refining‑plants; dynamic‑parameter acquisition at confined measuring‑points with long‑distance cabling for large‑scale industrial induced‑draught fans, forced‑draught fans and circulating‑water pumps; hardware fitting for confined‑space standard‑thread measuring‑points; deployment of high‑temperature monitoring‑systems requiring cross‑area long‑cable routing; original‑equipment replacement of aged short‑probe armoured sensors under high‑temperature operating‑conditions; accuracy‑upgrade retrofits for monitoring‑systems at high‑temperature confined measuring‑points; unattended on‑line monitoring of high‑risk high‑temperature compact power‑equipment; vibration‑anomaly fault diagnosis and trend analysis at high‑temperature confined machinery measuring‑points; compliance‑monitoring hardware for industrial heavy‑duty rotating‑machinery at confined measuring‑points; and data acquisition for predictive maintenance of equipment under high‑temperature long‑cable operating‑conditions.
As a dedicated high‑precision armoured high‑temperature‑resistant eddy‑current sensor within the 3300 XL series (M10 thread, 7‑mm ultra‑short unthreaded probe, 5‑metre cable), it delivers core strengths: ultra‑short probe geometry for confined‑space installation, mechanically‑robust armoured cable construction, low measurement‑drift at high temperature, distortion‑free long‑distance transmission, non‑contact loss‑free measurement, wide‑temperature stable performance and maintenance‑free durability. It addresses well‑known industry‑wide drawbacks of conventional sensors: poor suitability for confined measuring‑points, high‑temperature‑induced measurement drift, long‑cable signal attenuation and vulnerable outer‑jacket damage. It mitigates risks of unplanned shutdown, component damage and safety incidents triggered by shaft rub, thermal rotor unbalance, high‑temperature bearing failure, over‑limit displacement and other faults at high‑temperature confined measuring‑points, and comprehensively guarantees long‑term safe, stable, efficient and compliant operation of large heavy‑duty rotating power‑machinery under combined high‑temperature, compact‑layout and long‑distance‑wiring operating‑conditions. It is the preferred original‑equipment core sensor for new‑system deployment, legacy‑system retrofits and fault‑repair maintenance projects of rotating‑machinery condition‑monitoring systems for industrial high‑temperature confined measuring‑points.
