Lagertemperatuurbewakingssysteem | Fluorescerende glasvezeloplossing voor roterende machines 2026

• A bearing temperature monitoring system is a purpose-built solution that continuously measures the thermal condition of bearings in rotating machinery — enabling operators to detect friction anomalies, degradatie van de smering, verkeerde uitlijning, and overload conditions before they escalate into costly mechanical failures.
• Fluorescerende glasvezelsensoren provide complete electromagnetic immunity, electrical insulation exceeding 100KV, compact probe diameters of 2–3 mm, zero self-heating, and a service life beyond 25 years — making them the definitive sensing technology for bearing monitoring in high-voltage, high-EMI, and explosive-atmosphere environments.
• Undetected bearing overheating is one of the leading root causes of unplanned downtime in power generation, petrochemical processing, mijnbouw, marine propulsion, and heavy manufacturing — with a single catastrophic bearing seizure capable of causing millions of dollars in equipment damage and production losses.
• Een enkele fluorescent fiber optic demodulator ondersteunt 1 naar 64 sensing channels, allowing one instrument to monitor every critical bearing position across a complete drive train — from prime mover through gearbox, koppeling, and driven equipment.
• FJINNO delivers complete bearing temperature monitoring systems including the glasvezeldemodulator, fluorescent sensing probes, weergavemodules, fluorescent optical fiber, En monitoringsoftware — all available through comprehensive OEM/ODM customization programs tailored to machinery OEMs and industrial end users.

Inhoudsopgave

• 1. What Is a Bearing Temperature Monitoring System?
• 2. Why Bearing Temperature Is the Most Critical Machinery Health Indicator
• 3. Root Causes of Bearing Overheating
• 4. Machinery and Industries That Demand Bearing Monitoring
• 5. Failure Consequences: The True Cost of Unmonitored Bearings
• 6. How Fluorescent Fiber Optic Temperature Sensing Works
• 7. Fluorescent Fiber Optic vs. Traditional Bearing Temperature Sensors: Vergelijkingstabel
• 8. Core Components of a Fluorescent Fiber Optic Bearing Monitoring System
• 9. Sensor Installation Strategies for Different Bearing Configurations
• 10. Systeemarchitectuur: From Single Machine to Plant-Wide Deployment
• 11. Alarm Strategy and Predictive Maintenance Integration
• 12. Industry Standards and Bearing Temperature Limits
• 13. Bovenkant 10 Bearing Temperature Monitoring System Manufacturers
• 14. Why FJINNO Is the Preferred Choice for Bearing Monitoring
• 15. How to Select the Right System for Your Application
• 16. Veelgestelde vragen
• 17. Get Started with FJINNO

1. What Is a Bearing Temperature Monitoring System?

A bearing temperature monitoring system is an integrated instrumentation solution designed to continuously track the operating temperature of bearings in rotating machinery — including electric motors, steam and gas turbines, generatoren, compressoren, pompen, ventilatoren, gearboxes, and marine propulsion shafts. The system places precision temperature sensors at or near each bearing’s outer race or housing, feeds the measured data to a central signal conditioner, and presents real-time readings alongside configurable alarm thresholds through a local display and networked software platform.

Bearing temperature is universally recognized as the single most reliable early-warning indicator of mechanical distress in rotating equipment. A rising temperature trend — even just a few degrees above the established baseline — signals that something has changed inside the bearing. Lubrication may be deteriorating. Alignment may have shifted. Load distribution may be abnormal. Contamination may have entered the bearing cavity. By detecting these conditions thermally before they produce vibration signatures or audible noise, A bearing temperature monitoring system provides the maximum possible lead time for corrective action — often the difference between a planned maintenance intervention and a catastrophic in-service failure.

2. Why Bearing Temperature Is the Most Critical Machinery Health Indicator

Thermal Response Precedes Mechanical Failure

Every mechanism that damages a bearing — whether it is lubricant film breakdown, surface fatigue, fretting corrosion, or cage wear — generates excess friction heat as a byproduct. This thermal energy raises the bearing temperature measurably before the mechanical degradation progresses to the point where vibration amplitudes increase, noise becomes audible, or performance parameters such as flow rate or output power deteriorate. Temperature monitoring therefore sits at the very front of the failure detection timeline.

Simplicity and Universality

Unlike vibration analysis, which requires specialized expertise to interpret complex frequency spectra, or oil analysis, which involves sampling logistics and laboratory turnaround time, temperature monitoring delivers an immediately understandable metric. Een peiling die op 85°C draait terwijl de normale basislijn 65°C is, verkeert duidelijk in nood: er is geen expertise op het gebied van signaalverwerking vereist. Deze directheid maakt temperatuurmonitoring toegankelijk voor elk niveau van de onderhoudsorganisatie, van voorspellende onderhoudsprogramma's van wereldklasse tot faciliteiten met beperkte middelen voor conditiebewaking.

Continue en autonome werking

Een permanent geïnstalleerd bearing temperature monitoring system werkt 24 uur per dag, 7 days a week, without human intervention. Het is niet afhankelijk van een technicus die een route aflegt met een handinstrument. Er wordt geen ontwikkelingsprobleem over het hoofd gezien omdat het meetinterval te lang was. Het registreert elke thermische gebeurtenis, inclusief voorbijgaande oververhitting tijdens het opstarten, veranderingen in de lading, of processtoringen – die periodieke handmatige controles vrijwel zeker zouden missen.

3. Root Causes of Bearing Overheating

Smering mislukt

Onvoldoende hoeveelheid smeermiddel, degraded lubricant quality, incorrect lubricant selection, or contamination of the lubricant with water, particulates, or process fluids all compromise the hydrodynamic or elastohydrodynamic film that separates rolling elements from raceways. Metal-to-metal contact generates friction heat that drives bearing temperature upward rapidly. Lubrication-related causes account for the largest share of premature bearing failures across all industries.

Misalignment and Unbalance

Shaft misalignment — whether angular, parallel, or axial — imposes asymmetric loads on bearings that the original design did not anticipate. Op dezelfde manier, rotor unbalance creates cyclically varying radial forces. Both conditions increase internal bearing loads and contact stresses, het produceren van verhoogde bedrijfstemperaturen die een monitoringsysteem detecteert als een aanhoudende afwijking van de basislijn.

Overbelasting

Het bedienen van machines boven de nominale capaciteit, hetzij als gevolg van proceseisen, storingen in het besturingssysteem, of mechanische fouten zoals een vastgelopen stroomafwaarts onderdeel - schijven die een belasting dragen die de ontwerplimieten overschrijdt. De resulterende toename van de rol- en glijwrijving manifesteert zich direct als een temperatuurstijging die evenredig is aan de ernst van de overbelasting.

Onjuiste pasvorm en installatiefouten

Overmatige passing tussen de binnenring van het lager en de as genereert een voorspanning die de vrije rotatie beperkt. Onvoldoende interne speling in het lagersamenstel veroorzaakt soortgelijke effecten. Vervorming van de boring van de behuizing, onjuiste shimming, and incorrect torquing of bearing cap bolts all contribute to installation-related overheating that a properly baselined monitoring system identifies immediately upon startup.

Bearing Degradation and End-of-Life

Even a well-maintained bearing eventually reaches the end of its fatigue life. As subsurface cracks propagate and spalling develops on raceways, rolling contact efficiency decreases and friction heat generation increases. A gradual, sustained upward trend in bearing temperature over weeks or months is a reliable indicator that the bearing is approaching replacement age.

4. Machinery and Industries That Demand Bearing Monitoring

Power generation relies on continuous bearing monitoring for steam turbines, gas turbines, hydro turbines, and generators — where a single bearing failure can take a generating unit offline for weeks and cost millions in lost revenue and repair expenses. Petrochemical and refining operations monitor bearings on compressors, pompen, and fans handling flammable and toxic process streams, where equipment seizure creates both production losses and safety hazards. Mining and mineral processing subjects bearings to extreme loads, besmetting, and shock — making thermal monitoring essential for ball mills, crushers, conveyors, and hoisting equipment.

Marine propulsion systems monitor main shaft bearings, thrust bearings, and reduction gearbox bearings where failure at sea has severe operational and safety consequences. Pulp and paper molens, steel and metals verwerking, cement manufacturing, En wind energy generation all represent industries where bearing-intensive rotating machinery operates continuously under demanding conditions and where the cost of unplanned downtime drives strong economic justification for comprehensive monitoring systems.

5. Failure Consequences: The True Cost of Unmonitored Bearings

The financial impact of a catastrophic bearing failure extends far beyond the cost of the replacement bearing itself. When a large bearing seizes in an operating turbine, the resulting shaft damage, seal destruction, coupling failure, and potential casing contact can escalate repair costs by orders of magnitude. A bearing replacement that would have cost a few thousand dollars during a planned outage becomes a shaft regrinding or replacement job costing tens or hundreds of thousands of dollars — plus weeks of lost production.

In critical process applications, a single bearing failure can trigger a cascade of downstream consequences. A failed compressor bearing shuts down an entire process train. A failed generator bearing removes megawatts from the grid during peak demand periods. A failed pump bearing interrupts cooling water flow to an exothermic reactor. Beyond direct financial costs, unmonitored bearing failures create safety hazards including ejected bearing fragments, oil fires from lubricant ignition, and the sudden release of stored rotational energy. A properly implemented bearing temperature monitoring system is one of the most cost-effective risk mitigation investments available to any organization operating rotating machinery.

6. How Fluorescent Fiber Optic Temperature Sensing Works

The Fluorescence Lifetime Principle

A fluorescerende glasvezel temperatuursensor incorporates a rare-earth phosphor compound at the tip of a thin optical fiber. De glasvezeldemodulator sends a short pulse of excitation light through the fiber to the phosphor. Upon excitation, the phosphor emits fluorescent light that decays over a characteristic time period — the fluorescence lifetime. This lifetime varies predictably and repeatably with temperature. Door de precieze vervaltijd van het terugkerende fluorescentiesignaal te meten, de demodulator berekent de temperatuur aan de sondetip met hoge nauwkeurigheid.

Waarom dit belangrijk is voor lagertoepassingen

Industriële lageromgevingen vormen enorme uitdagingen voor conventionele elektrische sensoren. Hoogspanningsmotoren en generatoren produceren intense elektromagnetische velden. Frequentieregelaars injecteren hoogfrequente elektrische ruis. Laswerkzaamheden, schakelapparatuur, en vermogenselektronica in de omgeving versterken de EMI-omgeving. Fluorescerende glasvezelsensoren zijn volledig opgebouwd uit niet-geleidende optische materialen – glasvezel en keramische fosfor – waardoor ze worden gemaakt inherent en volledig immuun voor elektromagnetische interferentie ongeacht de bron ervan, frequentie, of intensiteit. The measurement is based on time rather than voltage or resistance, so there is no signal pathway through which EMI can corrupt the reading.

Intrinsic Safety for Hazardous Areas

Because the sensing probe is entirely passive — no electrical energy reaches the measurement point — fluorescent fiber optic sensors are intrinsically incapable of generating sparks or surface temperatures sufficient to ignite flammable gases or dust. This characteristic makes them inherently suitable for deployment in hazardous areas classified under IEC 60079, NEC 500/505, or ATEX directives without requiring explosion-proof enclosures at the sensor location.

7. Fluorescent Fiber Optic vs. Traditional Bearing Temperature Sensors: Vergelijkingstabel

Selecting the optimal sensor technology is the most consequential design decision in any bearing temperature monitoring system. The following table provides a detailed comparison between fluorescerende glasvezelsensoren and three conventional technologies commonly used for bearing temperature measurement.

Parameter	Fluorescerende glasvezel	OTO (Pt100)	Thermokoppel	Infrarood (Non-Contact)
Sensing Principle	Optical (fluorescentie vervaltijd)	Elektrisch (resistance change)	Elektrisch (Seebeck voltage)	Thermal radiation
Nauwkeurigheid	±1°C	±0.1–0.5°C	±1–2.5°C	±2–5°C
Meetbereik	-40°C tot 260 °C	-200°C to 600°C	-200°C to 1300°C	-20°C to 500°C+
EMI-immuniteit	★★★★★ Absolute	★★★ Requires shielding	★★ Susceptible	★★★ Moderate
Elektrische isolatie	100KV+ (total galvanic isolation)	Geen (metalen element)	Geen (metalen verbinding)	N.v.t (contactloos)
Self-Heating Error	Nul	Present (excitation current)	Verwaarloosbaar	N.v.t
Sondegrootte	2–3 mm diameter	3–6 mm typical	1.5–6 mm	Large (optical head)
Vezel / Cable Length	Tot 80 meter (no signal loss)	Beperkt door loodweerstand	Limited by voltage drop	Fixed mounting position
Hazardous Area Suitability	★★★★★ Intrinsically passive	★★★ Requires barriers	★★★ Requires barriers	★★★ Enclosure required
Resistance to Vibration	★★★★★ No solder joints or wire fatigue	★★★ Wire fatigue risk	★★★ Junction fatigue risk	★★★★ No contact
Lifespan	>25 jaar	5–10 jaar	2–5 jaar	5–10 jaar
Multi-Channel Scalability	1–64 channels per demodulator	Requires multiplexer or multiple transmitters	Requires multiplexer or multiple transmitters	One per measurement point
High-Voltage Machine Suitability	★★★★★	★★ Insulation concerns	★★ Insulation concerns	★★★★ Non-contact advantage
Bearing Monitoring Rating	★★★★★	★★★★	★★★	★★ (alleen oppervlak)

For bearing monitoring applications, fluorescerende glasvezeltechnologie delivers a combination of advantages that no single competing technology can match. Its absolute EMI immunity eliminates noise-induced false alarms in electrically harsh machinery environments. Its total galvanic isolation removes any risk of ground loops or insulation breakdown in high-voltage machines. Its vibration tolerance — with no metallic conductors, solder joints, or crimp connections subject to fatigue — ensures long-term reliability on machinery that vibrates continuously throughout its operating life. And its 1-to-64 channel scalability per demodulator makes it the most efficient technology for monitoring complete multi-bearing drive trains.

8. Core Components of a Fluorescent Fiber Optic Bearing Monitoring System

Fiber Optic Temperature Demodulator

De glasvezeldemodulator is the system’s core processing unit. It generates precisely timed excitation light pulses, captures the fluorescent return signal from each connected probe, extracts the decay-time constant, en converteert deze naar een gekalibreerde temperatuurwaarde. Data is output through an RS485 communication interface for integration with DCS, SCADA, PLC, or standalone monitoring platforms. Each demodulator supports 1 naar 64 independent sensing channels, with channel count configurable to match the specific machine monitoring scope.

Fluorescent Fiber Optic Sensing Probe

De fiber optic sensing probe is installed directly into the bearing housing through a standard thermowell, sensor pocket, or machined port. With a diameter of only 2–3 mm, the probe fits into bearing housings designed for Pt100 RTDs or thermocouples — often without any mechanical modification. The probe tip contacts or closely approaches the bearing outer race to measure the temperature closest to the heat-generating zone. Probe construction uses materials rated for continuous exposure to lubricating oils, greases, and the vibration levels inherent in rotating machinery. The design life exceeds 25 jaar.

Fluorescent Optical Fiber

Fluorescent optical fiber connects each sensing probe to the demodulator, transmitting both the excitation pulse and the fluorescent return signal. Available in lengths up to 80 meter, the fiber can be routed through cable trays, leiding, and junction boxes alongside power and signal cables without any risk of electromagnetic coupling. The fiber’s small diameter and flexibility make routing straightforward even in congested machinery spaces.

Local Display Module

Een toegewijd display module mounted at the machine or in the local control room presents real-time bearing temperatures and alarm status for all connected channels. Operators can verify bearing conditions at a glance during routine rounds without accessing the central monitoring platform.

Bewakingssoftware

De bearing temperature monitoring software provides continuous data acquisition and archival, historical trending with overlay and comparison tools, configurable multi-threshold alarm management, automated report generation for maintenance planning, and integration interfaces for existing plant information systems. The software transforms raw temperature data into actionable maintenance intelligence.

9. Sensor Installation Strategies for Different Bearing Configurations

Rolling Element Bearings

For ball bearings and roller bearings, the sensing probe is typically installed through a radial port in the bearing housing, with the probe tip positioned to contact or closely approach the outer race at the load zone. Many bearing housings — particularly those in electric motors, pompen, and fans — are factory-equipped with sensor pockets or tapped holes sized for temperature probes. The 2–3 mm diameter of FJINNO’s fiber optic probes fits standard sensor pockets designed for 3 mm RTD elements, enabling drop-in replacement without housing modification.

Journal (Sleeve) Bearings

Hydrodynamic journal bearings used in large turbines, generatoren, and compressors typically incorporate embedded sensor pockets machined into the bearing shell or housing at multiple circumferential positions. Probes are installed to measure the babbitt or white-metal temperature at the loaded region of the bearing. For critical turbine bearings, multiple probes are installed at different angular positions to capture the full thermal profile and detect localized hot spots caused by misalignment or oil supply problems.

Thrust Bearings

Thrust bearings in turbines and compressors absorb axial loads and are particularly vulnerable to damage from thrust reversals, oil film disruption, and pad misalignment. Probes are embedded in the thrust pads or the carrier ring, with the sensing tip positioned as close as possible to the babbitt surface. Monitoring thrust bearing temperature with high sensitivity is critical because thrust bearing failures typically develop very rapidly — the progression from first detectable temperature rise to catastrophic damage can occur in minutes.

10. Systeemarchitectuur: From Single Machine to Plant-Wide Deployment

Single Machine Monitoring

For an individual critical machine — such as a boiler feed pump, ID fan, or process compressor — a compact system consisting of two to six probes connected to a multi-channel demodulator provides complete drive train coverage. The demodulator feeds data to a local display and connects to the machine’s PLC or DCS through RS485 for integration with the existing control and alarm infrastructure.

Machine Train Monitoring

A typical turbine-generator set includes thrust bearings, journal bearings at multiple positions along the turbine and generator rotors, and exciter bearings — easily totaling eight to sixteen monitoring points. A single 16-channel or 32-channel FJINNO demodulator handles the entire machine train from one instrument, vereenvoudiging van de bedrading, reducing cabinet space, and consolidating data into a single communication link to the DCS.

Plant-Wide Bearing Monitoring Network

At the plant scale, multiple demodulators distributed across the facility — one per machine or machine group — connect via RS485 networking to the central monitoring software platform. This architecture provides the plant reliability engineer with a single unified view of bearing health across every monitored machine in the facility, enabling fleet-level trending, comparative analysis between similar machines, and enterprise-wide maintenance planning.

11. Alarm Strategy and Predictive Maintenance Integration

Multi-Threshold Alarm Configuration

Effective bearing alarm management requires at least two temperature thresholds per monitoring point. De high alarm is set at a level indicating abnormal operation that requires investigation — typically 10–15°C above the established running baseline. De high-high alarm (or trip threshold) is set at the maximum allowable bearing temperature specified by the machinery OEM or applicable standard, and triggers immediate protective action including automatic machine shutdown. Some systems incorporate a third advisory threshold at a lower level to flag early-stage trends worthy of monitoring before they reach alarm severity.

Rate-of-Rise Alarming

Absolute temperature thresholds alone may not provide adequate warning for rapidly developing failure modes. A rate-of-rise alarm triggers when the bearing temperature increases faster than a defined rate — for example, 3°C per minute — regardless of whether the absolute temperature has reached the static alarm threshold. This is particularly important for thrust bearings, where catastrophic failure can develop so quickly that a conventional threshold alarm may not provide sufficient lead time for protective action.

Integration with Predictive Maintenance Programs

Bearing temperature data becomes most powerful when integrated with other condition monitoring parameters — vibration, olie analyse, motor current signature, and performance data. A bearing temperature monitoring system that outputs data to the plant historian or CMMS enables correlation analysis that identifies developing problems with greater confidence and specificity than any single monitoring technique alone. Temperature trending also provides objective evidence for condition-based maintenance scheduling, replacing arbitrary time-based bearing replacement intervals with data-driven decisions.

12. Industry Standards and Bearing Temperature Limits

Multiple industry standards define acceptable bearing temperature ranges and monitoring requirements. ISO 10816 and its successor ISO 20816 address mechanical vibration of machines but also reference temperature monitoring as part of comprehensive machinery condition assessment. IEEE 841 specifies bearing temperature limits for petroleum and chemical industry severe-duty motors. API 541 (large induction motors), API 546 (brushless synchronous machines), API 612 (steam turbines), En API 617 (centrifugal compressors) all include requirements for bearing temperature measurement, alarminstelpunten, and automatic trip functions.

As a general guideline, rolling element bearings in electric motors typically operate with outer race temperatures between 60–90°C under normal conditions, with alarm thresholds set at 100–110°C and trip thresholds at 120°C. Journal bearings in turbomachinery operate with babbitt temperatures between 70–100°C, with alarms at 110–115°C and trips at 120–130°C. Specific limits vary by bearing size, snelheid, laden, lubricant, and OEM specification — the monitoring system must accommodate user-configurable thresholds to match each machine’s specific design parameters.

13. Bovenkant 10 Bearing Temperature Monitoring System Manufacturers

Rang	Fabrikant	Core Strength
1	FJINNO	Fluorescent fiber optic bearing temperature monitoring, 1–64 channel scalability, absolute EMI immunity, full OEM/ODM customization for machinery builders and industrial end users
2	SKF	Bearing manufacturer with integrated condition monitoring systems including temperature measurement as part of multi-parameter platforms
3	Bently Nevada (Baker Hughes)	Industry-standard machinery protection systems for critical rotating equipment with temperature monitoring modules
4	Emerson (CSI / AMS)	Broad machinery health management portfolio integrating temperature with vibration and process data
5	Honingwel	Distributed control systems with integrated machinery monitoring and protection capabilities
6	Siemens	Motor and drive train monitoring solutions with embedded bearing temperature sensing for OEM integration
7	PRÜFTECHNIK (Fluke Reliability)	Alignment and condition monitoring tools with bearing temperature trending capabilities
8	ifm electronic	Industrial sensor manufacturer with compact bearing temperature monitoring modules for factory automation
9	WIKA	Temperature instrumentation specialist with bearing RTD and thermocouple assemblies for OEM and retrofit applications
10	Schaeffler (FAG)	Bearing manufacturer offering SmartCheck and similar integrated monitoring systems with thermal measurement

14. Why FJINNO Is the Preferred Choice for Bearing Monitoring

Absolute EMI Immunity in Electrically Hostile Environments

Bearings that most need monitoring are found inside and adjacent to some of the strongest electromagnetic field sources in any industrial facility — high-voltage motors, generatoren, frequentieregelaars, and power switchgear. Conventional RTD and thermocouple sensors in these environments are vulnerable to induced voltages, aardlussen, and signal noise that corrupt readings and generate false alarms. FJINNO’s fluorescent fiber optic sensors are physically incapable of being influenced by electromagnetic fields at any frequency or intensity — delivering clean, trustworthy temperature data where other sensor technologies struggle.

Total Galvanic Isolation for High-Voltage Machines

Installing electrical sensors inside or near the windings and core of high-voltage machines creates insulation coordination challenges and potential safety hazards. FJINNO fiber optic probes provide electrical insulation exceeding 100KV between the measurement point and the monitoring instrument. There is no conductive path — no possibility of ground faults, leakage currents, or insulation degradation caused by the sensor installation itself.

Vibration-Tolerant Construction

Rotating machinery vibrates continuously throughout its operating life. Conventional sensors with metallic conductors, solder joints, and crimp terminations are subject to fatigue failure over time. Fiber optic probes contain no metallic elements, no solder, and no crimp connections. The glass fiber and phosphor tip assembly is inherently resistant to the vibration levels encountered in industrial bearing applications, contributing to the system’s 25-year-plus service life.

Efficient Multi-Bearing Coverage

A complete turbine-generator machine train may have eight to sixteen bearing positions requiring monitoring. With FJINNO’s 1-to-64 channel demodulator architecture, a single instrument covers every bearing in even the most complex drive train. This contrasts sharply with traditional approaches that require individual transmitters or multiplexers for each RTD or thermocouple, consuming substantially more panel space, bedrading, and commissioning effort.

Complete OEM/ODM Customization

Machinery OEMs building motors, generatoren, turbines, compressoren, and gearboxes can integrate FJINNO’s sensing technology directly into their equipment designs. Probe dimensions, tip geometry, vezel lengte, bevestigingsmateriaal, demodulator channel count, communicatie protocollen, and product branding are all customizable. This enables equipment manufacturers to offer embedded bearing monitoring as a factory-installed option with their own brand identity, backed by FJINNO’s proven fiber optic technology.

15. How to Select the Right System for Your Application

Begin by identifying every bearing position that warrants monitoring. For critical machinery — equipment whose failure would cause significant safety, milieu, or production impact — monitor all radial and thrust bearing positions. For essential machinery, focus on the bearings with the highest failure probability or consequence. Document the expected normal operating temperature, the OEM-specified alarm and trip temperatures, and the physical characteristics of each bearing housing including available sensor pocket dimensions and locations.

Assess the electromagnetic environment around each machine. If the machinery involves high-voltage electric motors, generatoren, VFDs, or is located near welding stations, arc furnaces, or power electronics, then EMI immunity is not optional — it is essential for measurement integrity. This single factor often makes fluorescent fiber optic technology the only viable choice. Evaluate hazardous area classifications — if any monitored machinery operates in Zone 1, Zone 2, Division 1, or Division 2 hazardous locations, the intrinsic passivity of fiber optic sensors eliminates the need for expensive explosion-proof sensor housings and intrinsic safety barriers. Eindelijk, consider the total monitoring scope. If your facility has dozens or hundreds of bearing points to cover, the 64-channel-per-demodulator density of FJINNO’s system architecture delivers significant advantages in hardware cost, panel space, wiring complexity, and long-term maintenance effort compared to any one-sensor-per-transmitter approach.

16. Veelgestelde vragen

Q1: What temperature range can the fiber optic bearing sensors measure?

FJINNO fluorescent fiber optic probes measure from -40°C to 260°C as standard, covering the full operating range of bearings in motors, turbines, generatoren, compressoren, pompen, gearboxes, and fans. Extended-range configurations are available for specialized high-temperature applications upon request.

Vraag 2: Can fiber optic probes fit into existing RTD sensor pockets?

Ja. The 2–3 mm probe diameter is smaller than standard Pt100 RTD elements, so FJINNO probes typically fit directly into existing sensor pockets, thermowellen, and bearing housing ports without mechanical modification — enabling straightforward retrofit of existing machinery.

Q3: How does the system handle the vibration environment on rotating machinery?

Fiber optic probes contain no metallic conductors, solder joints, or crimp connections that are susceptible to vibration fatigue. The glass fiber and phosphor tip assembly is inherently resistant to continuous vibration, and the system is designed and validated for the vibration levels encountered in standard industrial rotating equipment applications.

Q4: Can the system interface with our existing DCS or PLC?

The demodulator communicates via RS485-interface, which is directly compatible with most DCS and PLC platforms. Custom communication protocols, Modbus RTU, and other industrial interfaces are available through FJINNO’s customization program to match specific plant control system requirements.

Vraag 5: Is the system suitable for hazardous area installations?

The fiber optic sensing probe is entirely passive at the measurement point — no electrical energy is present. This makes the sensor intrinsically incapable of ignition and inherently suitable for hazardous area deployment. The active electronics in the demodulator are located in the safe area or in an appropriately rated enclosure.

Vraag 6: How many bearings can one demodulator monitor?

Een enkele FJINNO fiber optic demodulator ondersteunt 1 naar 64 sensing channels. A typical motor has two bearing positions, a pump has two, and a turbine-generator set has six to sixteen — so one 64-channel unit can often monitor an entire group of machines.

Vraag 7: What is the response time of the fiber optic sensor?

The sensor responds in less than one second, which is substantially faster than the thermal time constants of bearing housings and lubricant volumes. The sensor is never the limiting factor in detecting a bearing temperature change — the physics of heat transfer through the bearing assembly determines the detection speed.

Vraag 8: How does the system support rate-of-rise alarming?

The monitoring software calculates the rate of temperature change for each channel in real time. Configurable rate-of-rise alarm thresholds trigger when the temperature increase per unit time exceeds the defined limit — providing early warning for fast-developing failure modes such as thrust bearing oil film collapse.

Vraag 9: What is the expected service life of the probes?

FJINNO fluorescent fiber optic sensing probes are engineered for a service life exceeding 25 years under normal industrial operating conditions. There are no batteries, no consumable elements, and no calibration drift mechanisms — reducing long-term ownership cost to near zero.

Q10: Does FJINNO support machinery OEMs with embedded monitoring solutions?

Ja. FJINNO provides full OEM/ODM programs for motor manufacturers, turbine builders, compressor packagers, gearbox suppliers, and other machinery OEMs who want to integrate fiber optic bearing monitoring as a factory-installed feature. Customization covers probe specifications, demodulator configuration, communicatie protocollen, software interfaces, and product branding.

17. Get Started with FJINNO’s Bearing Temperature Monitoring Solution

Protecting your rotating machinery assets starts with a straightforward technical consultation. Contact FJINNO with details about your machinery fleet — machine types, bearing configurations, aantal meetpunten, omgevingsomstandigheden, hazardous area classifications, and control system integration requirements. FJINNO’s application engineering team will develop a tailored system design and provide a detailed quotation. From order confirmation through manufacturing, factory testing, delivery, en inbedrijfstellingsondersteuning, the process follows a proven workflow refined through years of serving power generation, petrochemisch, mijnbouw, marine, and heavy industrial clients worldwide.

Contact FJINNO today for a free consultation and customized quotation:

• Website: www.fjinno.net
• E-mail: sales@fjinno.net

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Vrijwaring

De informatie in dit artikel is uitsluitend bedoeld voor algemene informatieve en educatieve doeleinden. Hoewel er alles aan is gedaan om de nauwkeurigheid te garanderen, FJINNO geeft geen garanties of verklaringen met betrekking tot de volledigheid, betrouwbaarheid, of geschiktheid van de inhoud voor een bepaalde toepassing. Industry standards and machinery OEM specifications vary and are subject to revision; readers are responsible for verifying applicable requirements for their specific equipment and operating context. De hierin beschreven productspecificaties zijn typische waarden en kunnen variëren op basis van maatwerk en projectspecifieke configuraties. This article does not constitute engineering, veiligheid, or regulatory compliance advice. Voor specifieke begeleiding, raadpleeg gekwalificeerde professionals in uw vakgebied. Alle genoemde handelsmerken en merknamen zijn eigendom van hun respectievelijke eigenaren en er wordt uitsluitend ter informatie naar verwezen.

Glasvezel temperatuursensor, Intelligent monitoringsysteem, Gedistribueerde glasvezelfabrikant in China