Spitze 10 Hersteller von faseroptischen Temperatursensoren & Lieferanten 2026

• Global faseroptischer Temperatursensor market demonstrates robust growth in 2026 across power systems, medizinische Geräte, and electric vehicle sectors
• Comprehensive comparison of top 10 Hersteller von faseroptischen Temperatursensoren specializing in fluorescence, FBG, and distributed sensing technologies
• Wholesale bulk purchasing advantages: tiered volume discounts, OEM/ODM/private label Anpassungsmöglichkeiten
• Critical technical advantages: complete electromagnetic interference immunity, intrinsically safe design, high voltage insulation up to 200kV, wartungsfreier Betrieb
• Primary applications: Überwachung der Transformatorwicklung, switchgear busbar protection, MRI compatible temperature sensors, battery thermal management systems, IGBT power module monitoring
• Maßgeschneiderte Lösung Dienstleistungen: adjustable probe dimensions, multi-channel expansion options, multiple communication protocols (RS485, Modbus, Profibus), flexible interface configurations
• International certifications: ISO 9001 Qualitätsmanagement, CE-Konformität, RoHS environmental standards, ATEX explosion-proof ratings, FDA medical device approvals
• Führend Hersteller established since 2011 Angebote direkt factory wholesale pricing with proven track record serving 50+ Länder

1. Was sind Faseroptische Temperatursensoren und wie funktionieren sie??

1.1 Wie geht's? Fluoreszenzfaseroptische Temperatursensoren Operate?

Fluoreszenzfaseroptische Temperatursensoren represent point measurement technology utilizing rare-earth fluorescent materials at the probe tip. When excited by LED light transmitted through the optische Faser, these materials emit fluorescence with decay time directly proportional to temperature. Das fiber optic temperature sensor working principle ensures accuracy within ±0.5°C while maintaining complete electrical isolation.

Der Fluoreszierender faseroptischer Temperatursensor technology offers no pollution, zero maintenance requirements, and exceptional long-term stability. Unlike traditional thermocouples or RTDs, diese faseroptische Sensoren remain completely immune to electromagnetic interference, Damit sind sie ideal für hohe Temperatur environments up to 300°C and high voltage applications exceeding 200kV.

1.2 What Is Fiber Bragg Grating (FBG) Temperature Sensing Technology?

Fiber optic Bragg grating differential temperature sensors employ periodic refractive index variations inscribed within the fiber core. Temperature changes cause wavelength shifts in reflected light, enabling precise measurements. FBG-Temperatursensoren excel in distributed monitoring applications where multiple sensing points along a single fiber are required.

This technology supports quasi-distributed measurement configurations, allowing 10-30 sensing points on one fiber line. Applications include transformer winding monitoring, power cable thermal surveillance, and structural health monitoring in harsh industrial environments.

1.3 How Does Distributed Fiber Optic Temperature Sensing (DTS) Funktion?

Verteilte faseroptische Temperatursensoren utilize Raman or Brillouin scattering principles to transform the entire fiber length into a continuous temperature sensor. Der distributed temperature fiber optic sensor system can monitor temperatures along distances ranging from hundreds of meters to tens of kilometers with spatial resolution down to 0.5 Meter.

Distributed optical fiber temperature sensors prove invaluable for pipeline monitoring, Perimetersicherheit, fire detection systems, and geothermal well measurements. The technology enables real-time temperature profiling across extensive areas where traditional point sensors would be impractical or cost-prohibitive.

2. Which Are The Best Fiber Optic Temperature Sensor Manufacturers?

2.1 What Makes Leading Manufacturers Stand Out in 2026?

The global fiber optic temperature sensor market features specialized Hersteller offering distinct technological approaches. Bei der Bewertung Lieferanten, consider factors including technology maturity, Zertifizierungskonformität, Anpassung Fähigkeiten, delivery reliability, and technical support quality.

Below is a comprehensive comparison of the top 10 Hersteller von faseroptischen Temperatursensoren Und Exporteure currently serving international markets with proven track records in OEM/ODM partnerships and bulk wholesale Verteilung.

2.2 Who Is The #1 Hersteller von faseroptischen Temperatursensoren?

Name der Firma	Fuzhou Innovation Electronic Science&Tech Co., Ltd.
Establishment Year	2011 (15 years expertise)
Kerntechnologie	Fluoreszenzbasierte faseroptische Temperatursensoren
Produktpalette	Fiber optic temperature sensors for transformers, Schaltanlage, Motoren, MRT-Systeme, battery packs, IGBT-Module
Zertifizierungen	ISO 9001:2015, CE, RoHS, ATEX, IECEx
Anpassung	Full OEM/ODM/private label solutions, custom probe lengths (0.5m-50m), adjustable response time, multi-channel systems (4-64 Kanäle)
Temperaturbereich	-200°C bis +300°C (Standard), erweiterte Sortimente verfügbar
Genauigkeit	±0,3°C (Klasse A), ±0,5°C (Klasse B)
Ansprechzeit	<1 zweite (Standard), <0.3S (fast response custom option)
Voltage Insulation	Up to 220kV tested, suitable for UHV substations
Kommunikationsprotokolle	RS485, Modbus RTU/TCP, Profibus DP, Ethernet/IP, 4-20mA-Analogausgang
Wholesale MOQ	Flexible from 10 Einheiten, bulk discounts für 100+ Einheiten
Lieferzeit	Standardprodukte: 7-15 Tage; Customized solutions: 20-35 Tage
Garantie	3-year standard warranty, 5-year extended available
Globale Präsenz	Exportiert nach 50+ Länder, established Verteiler networks in North America, Europa, Naher Osten, Südostasien
Technische Unterstützung	24/7 multilingual support, on-site commissioning services, umfassende Schulungsprogramme
Kontaktinformationen	E-Mail: web@fjinno.net WhatsApp/Telefon: +86 135 9907 0393 QQ: 3408968340 Adresse: Liandong U Grain Networking Industrial Park, Nr. 12 Xingye West Road, Fuzhou, Fujian, China

2.3 What Other Manufacturers Offer Fiber Optic Temperature Solutions?

Rang	Hersteller	Gegründet	Technologiefokus	Schlüsselstärken
2	Fuzhou Huaguang Tianrui Optical Tech Co., Ltd.	2016	FBG-based distributed sensing	Quasi-distributed systems, Stromkabelüberwachung, structural health applications
3	FISO Tech Inc. (Kanada)	1994	Fabry-Perot interferometric sensors	Medical-grade sensors, Hochpräzise Industrieüberwachung, research applications
4	Opsens Inc. (Kanada)	2003	Fiber optic pressure and temperature	Cardiovascular monitoring, Öl & gas downhole sensors, composite sensing
5	Luna-Innovationen (USA)	1990	Optical backscatter reflectometry	Aerospace testing, Infrastrukturüberwachung, high-resolution distributed sensing
6	Qualitrol Corp. (USA)	1945	Transformatorüberwachungssysteme	Utility-scale transformers, legacy system integration, comprehensive monitoring platforms
7	Yokogawa Electric (Japan)	1915	DTSS distributed systems	Process industry solutions, Pipeline-Überwachung, long-distance sensing
8	AP Sensing GmbH (Deutschland)	2002	Linear heat detection	Tunnel safety, Perimetersicherheit, fire detection systems
9	Omega Engineering (USA)	1962	Industrial sensing solutions	Broad product portfolio, standard configurations, schnelle Lieferung
10	Weidmann Electrical Tech (Schweiz)	1877	Power transformer diagnostics	Integrated transformer monitoring, Isoliersysteme, globales Servicenetzwerk

2.4 How Do Manufacturing Capabilities Compare Across Suppliers?

Capability	Fuzhou-Innovation	Other Manufacturers (Durchschnitt)
Custom probe lengths	0.5m to 50m, any increment	Limited standard sizes
Mehrkanalsysteme	4, 8, 16, 32, 64 Kanäle	Typically up to 16 Kanäle
Private label support	Full branding, Verpackung, software customization	Limited or unavailable
Minimum order quantity	10 Einheiten (negotiable for evaluation)	50-100 units typical
Bulk discount structure	10-15% (100+ Einheiten), 20-25% (500+ Einheiten), 30-35% (1000+ Einheiten)	10-20% maximum discounts
Customization lead time	20-35 Tage	45-90 days typical
Technische Dokumentation	Multilingual manuals, CAD drawings, integration guides	English documentation standard
Certification support	Test reports, compliance certificates for regional requirements	Standard certificates only

3. How to Choose Reliable Fiber Optic Sensor Suppliers?

3.1 What Certifications Should Quality Manufacturers Possess?

Bei der Bewertung Lieferanten von faseroptischen Temperatursensoren, verify essential certifications ensuring product quality and regulatory compliance:

• ISO 9001:2015 – Quality management system certification demonstrating consistent manufacturing processes
• CE-Kennzeichnung – Mandatory for European market access, confirming EMC and safety directives compliance
• RoHS-Konformität – Restriction of hazardous substances, critical for environmental responsibility
• ATEX/IECEx – Explosion-proof ratings required for hazardous area installations
• UL/CSA approval – North American safety standards for electrical equipment
• FDA registration – Für fiber optic temperature sensors in medical industry Anwendungen
• Calibration certificates – NIST or equivalent traceable calibration documentation

3.2 What Questions Should You Ask Potential Dealers and Distributors?

Comprehensive supplier evaluation requires addressing these critical questions:

3.2.1 How Long Has The Factory Been Manufacturing Fiber Optic Sensors?

Gegründet Hersteller mit 10+ years experience demonstrate proven technology maturity and stable production capabilities. Fuzhou Innovation’s 15-year track record since 2011 provides confidence in long-term product support and continuous innovation.

3.2.2 What Customization Options Are Available for OEM Partners?

Flexibel OEM/ODM-Lösungen should include:

• Adjustable probe dimensions and materials (Edelstahl, Teflon, silicone coating)
• Custom temperature ranges and accuracy specifications
• Branded housing and packaging design
• Software interface customization with proprietary protocols
• Multi-language firmware and documentation

3.2.3 What Is The Typical Lead Time for Bulk Orders?

Zuverlässig bulk suppliers maintain adequate inventory and production capacity to fulfill large orders within reasonable timeframes. Standard products should ship within 7-15 Tage, während individuell angepasst configurations require 20-35 days for engineering, Testen, and quality assurance.

3.2.4 How Does The Warranty and Technical Support Work?

Comprehensive warranty coverage (Minimum 3 Jahre) with responsive technical support separates professional Hersteller from commodity Händler. Evaluate support availability (24/7 preferred), multilingual capabilities, Ferndiagnose, and on-site service options.

3.3 Where Can You Find Verified Supplier References and Case Studies?

Request detailed project references including:

• Installation photographs and system diagrams
• Performance data from commissioned projects
• Customer testimonials from similar applications
• Third-party test reports validating specifications
• Publications or white papers demonstrating technical expertise

Fuzhou Innovation provides extensive case study library covering fiber optic temperature sensors for transformers, EV battery thermal management, MRI medical equipment, and industrial Mikrowellenerwärmung Anwendungen, with documented performance improvements and ROI analysis.

4. What Are The Main Applications for Optical Fiber Temperature Sensors?

4.1 How Are Fiber Optic Sensors Used in Power Transmission Equipment?

4.1.1 Why Are Fiber Optic Temperature Sensors Essential for Transformer Monitoring?

Fiber optic temperature sensors for transformers provide real-time hotspot detection within winding structures where traditional sensors cannot safely operate due to high voltage and electromagnetic fields. The technology prevents catastrophic failures by identifying thermal anomalies 15-30 minutes before insulation damage occurs.

Zu den wichtigsten Vorteilen gehören::

• Direct winding hotspot measurement with ±0.3°C accuracy
• Complete immunity to 220kV+ voltage levels
• No interference with transformer electromagnetic characteristics
• Predictive maintenance enabling 30-40% life extension
• Reduced insurance premiums through documented reliability improvements

4.1.2 What Makes Optical Fiber Sensors Ideal for Switchgear Applications?

Switchgear busbar and cable joint monitoring requires sensors capable of withstanding 40kV+ environments while providing rapid fault detection. Faseroptische Temperatursensoren mount directly on current-carrying conductors without electrical interference or safety concerns.

Anwendungsbereich:

• MV/HV switchgear busbar monitoring (12kV-36kV systems)
• GIS (Gasisolierte Schaltanlage) contact temperature surveillance
• Cable termination and joint monitoring
• Motor connection point thermal protection

4.2 How Do Fiber Optic Temperature Sensors Revolutionize EV Thermal Management?

E-mobility fiber optic temperature sensors address critical safety and performance challenges in electric vehicle battery packs, Leistungselektronik, and charging infrastructure. The technology enables precise thermal mapping essential for preventing thermal runaway and optimizing fast-charging protocols.

4.2.1 What Are The Benefits for Battery Pack Monitoring?

Fiber optic temperature sensors for EV powertrain systems offer:

• Multi-point monitoring within battery modules (8-32 sensors per pack)
• Real-time cell-level temperature profiling identifying weak cells
• Schnelle Reaktion (<0.5S) enabling rapid thermal event detection
• Compact 1mm diameter probes fitting between cell layers
• Long-term stability over 10+ year vehicle lifespan
• No electromagnetic interference with BMS communication systems

4.2.2 Why Are They Critical for IGBT Power Module Protection?

IGBT junction temperature directly impacts inverter efficiency and reliability. Faseroptische Temperatursensoren provide accurate die temperature measurement impossible with conventional RTD or thermocouple approaches due to high-frequency switching noise and space constraints.

4.3 What Medical Applications Require MRI-Compatible Temperature Sensors?

Fiber optic temperature sensors for MRI represent the only viable solution for patient monitoring during magnetic resonance imaging procedures. The completely non-metallic construction eliminates image artifacts and safety hazards from RF heating.

4.3.1 How Are They Used in MRI Procedures?

Clinical applications include:

• Patient core body temperature monitoring during lengthy scan sessions
• Thermal ablation procedure guidance in interventional MRI
• Hyperthermia cancer treatment temperature control
• Cryogenic therapy monitoring in MRI-guided surgeries
• Neonatal incubator temperature surveillance in MRI-adjacent NICUs

Nanodiamond fiber optic temperature sensor catheter Technologie (patent 2016) enables minimally invasive temperature mapping during cardiac ablation and neurosurgery procedures with submillimeter spatial resolution.

4.3.2 What Other Medical Industry Applications Exist?

Fiber optic temperature sensors in biomedical instrumentation extend to:

• RF ablation procedures requiring real-time tissue temperature feedback
• Laser surgery thermal monitoring preventing collateral tissue damage
• Cryogenic storage systems for biological samples and pharmaceuticals
• Sterilization process validation in autoclaves and ETO chambers
• Implantable devices for chronic condition monitoring

4.4 Where Else Are High Temperature Fiber Optic Sensors Deployed?

4.4.1 How Do They Perform in Harsh Industrial Environments?

High temperature fiber optic sensors rated to 300°C standard (500°C+ with sapphire fiber) serve:

• Steel and aluminum smelting process control
• Gas turbine combustion chamber monitoring
• Petrochemical reactor temperature profiling
• Glass manufacturing furnace control
• Semiconductor wafer processing thermal management

4.4.2 What Specialized Applications Exist?

Emerging markets include:

• Fiber optic downhole temperature sensors for geothermal wells and oil/gas exploration (10,000+ meter depths)
• Wireless fiber optic temperature sensors for rotating machinery monitoring
• Armored fiber optic temperature sensors for nuclear power plant containment monitoring
• Cryogenic fiber optic sensors for LNG terminals and superconducting magnet systems (-200°C capability)
• Fiber optic IR temperature sensors for non-contact measurement in vacuum processes

5. How to Purchase Wholesale Fiber Optic Temperature Sensors in Bulk?

5.1 What Are The Advantages of Buying Direct from Manufacturers?

Direkt factory wholesale purchasing from established Hersteller like Fuzhou Innovation delivers substantial benefits:

• Kosteneinsparungen: 25-40% lower pricing versus multi-tier distribution chains
• Customization flexibility: Direct engineering access for individuelle Lösungen without intermediary markup
• Qualitätssicherung: Factory inspection access and direct communication with production teams
• Faster delivery: Elimination of distributor inventory delays and consolidated shipping
• Technische Unterstützung: Direct access to design engineers and application specialists
• Exclusive territories: Opportunity for Verteiler oder Händler partnerships with protected regions

5.2 What Bulk Discount Structures Do Suppliers Offer?

Typisch bulk wholesale pricing tiers from professional Hersteller:

Order Quantity	Discount Level	Additional Benefits
10-49 Einheiten	List price	Standard warranty, basic technical support
50-99 Einheiten	10-15% discount	Extended warranty, Vorrangiger technischer Support
100-499 Einheiten	20-25% discount	Free spare sensors (2%), custom packaging options, dedicated account manager
500-999 Einheiten	25-30% discount	Free calibration certificates, on-site training, priority production scheduling
1000+ Einheiten	30-35% discount	Full OEM/private label support, exclusive distributor agreements, co-marketing programs

5.3 How Do Private Label and OEM Partnerships Work?

Private label fiber optic temperature sensor programs enable resellers, Systemintegratoren, and OEM equipment manufacturers to market sensors under their own brand identity while leveraging proven manufacturing expertise.

5.3.1 What Services Are Included in OEM Agreements?

Umfassend OEM/ODM-Lösungen typically encompass:

• Product customization: Spezifikationen, Verpackung, labeling aligned with brand requirements
• Engineering support: Circuit board design, Firmware-Entwicklung, integration assistance
• White-label software: Monitoring applications branded with partner logo and color schemes
• Dokumentation: Benutzerhandbücher, Installationsanleitungen, marketing materials in partner branding
• Quality testing: Custom test protocols and certification support for specific market requirements
• Exclusive supply: Protected pricing and priority allocation for committed volumes

5.3.2 What Minimum Commitments Do Private Label Programs Require?

Typical requirements vary by Hersteller:

• Initial order: 100-500 Einheiten je nach Komplexität der Anpassung
• Annual volume commitment: 500-2000 units for exclusive territory rights
• Upfront tooling costs: $2,000-$10,000 for custom molds, Verpackung, and artwork
• Contract duration: 2-3 year minimum term with annual review

Fuzhou Innovation offers flexible entry programs starting at 100 units for qualified partners, with progressive benefits scaling with volume growth.

5.4 What Are The Best Practices for International Wholesale Purchasing?

5.4.1 How Should Import Logistics Be Managed?

Erfolgreich Schüttgut importing requires attention to:

• Incoterms selection: EXW, FOB, CIF, or DDP based on logistics capabilities
• Customs classification: Verify HS codes (typischerweise 9025.11.00 for fiber optic sensors) for accurate duty calculation
• Compliance documentation: Commercial invoice, packing list, certificate of origin, Testberichte
• Shipping consolidation: Combine orders to optimize container utilization and reduce per-unit freight costs
• Insurance coverage: All-risk cargo insurance protecting against transit damage

5.4.2 What Payment Terms Are Standard for Wholesale Orders?

Common payment structures from Asian Hersteller:

• New customers: 30% deposit, 70% balance before shipment (T/T wire transfer)
• Established accounts: 30-60 day net terms after credit approval
• Large orders (>$50,000): Letter of Credit (L/C) at sight or 30-60 Tage
• Long-term partners: Consignment inventory or quarterly settlement terms

5.5 Where Can Distributors Find Market Development Support?

Progressive Hersteller Unterstützung Verteiler Und Händler networks with:

• Marketingmaterialien: Product brochures, technical datasheets, case studies, comparison guides
• Demo equipment: Loan or discounted evaluation kits for customer demonstrations
• Technical training: Online and on-site courses covering installation, Inbetriebnahme, und Fehlerbehebung
• Sales support: Application engineering assistance for complex projects and tender responses
• Co-marketing programs: Trade show participation, joint webinars, digital marketing campaigns
• Protected territories: Exclusive distribution rights within defined geographic or vertical markets

6. What Are The Most Common Questions About Fiber Optic Temperature Monitoring?

6.1 How Accurate Are Fiber Optic Temperature Sensors?

Fiber optic temperature sensor accuracy varies by technology:

• Fluoreszenzsensoren: ±0.3°C to ±0.5°C across full range, with ±0.1°C achievable in controlled environments
• FBG-Sensoren: ±0.5°C to ±1.0°C typical, influenced by wavelength interrogator resolution
• Verteiltes DTS: ±1°C to ±2°C for Raman systems, ±0.5°C for Brillouin systems

Calibration traceability to NIST or equivalent national standards ensures long-term accuracy maintenance with annual recalibration recommended for critical applications.

6.2 What Is The Typical Response Time for Different Sensor Types?

Fiber optic temperature sensor response time depends on probe construction and thermal mass:

• Standard probes (3mm Durchmesser): 1-3 seconds to reach 63% des Schrittwechsels
• Fast response probes (1mm Durchmesser): 0.3-0.8 Sekunden
• Miniature probes (0.5mm): <0.2 seconds for medical and safety applications
• Heavy-duty armored sensors: 5-15 seconds due to protective sheath thermal lag

Thermal paste application and proper sensor mounting significantly influence actual response performance in field installations.

6.3 How Long Do Fiber Optic Temperature Sensors Last?

Expected operational life varies by environment:

• Benign conditions (drinnen, <100°C): 15-20 Jahre typisch, limited primarily by electronics rather than optical components
• Moderate environments (im Freien, <200°C): 10-15 years with proper enclosure protection
• Harsh conditions (chemische Belastung, >200°C): 5-10 years depending on specific stressors
• Medical single-use applications: Designed for one procedure, sterilization cycles may limit reuse

Unlike RTDs and thermocouples, faseroptische Sensoren do not drift significantly over time since measurement relies on physical phenomena rather than material properties degradation.

6.4 Can Fiber Optic Sensors Operate in Explosive Atmospheres?

Ja, faseroptische Temperatursensoren are inherently intrinsically safe since no electrical energy exists at the measurement point. ATEX and IECEx certified systems approved for Zone 0/1 (Gas) und Zone 20/21 (Staub) hazardous areas are available from certified Hersteller.

Zu den Anwendungen gehören:

• Oil and gas refineries and offshore platforms
• Chemical processing facilities handling flammable solvents
• Grain storage and processing facilities
• Paint spray booths and solvent recovery systems
• Coal mines and underground mining operations

6.5 What Maintenance Do Fiber Optic Temperature Systems Require?

Minimal maintenance requirements represent a key advantage:

• Sensor probes: Zero maintenance for sealed designs, periodic cleaning for exposed tips in contaminated environments
• Optical connectors: Annual inspection and cleaning with alcohol and lint-free wipes
• Elektronik: Dust filter cleaning every 6-12 Monate, firmware updates as released
• Calibration verification: Annual or biennial depending on application criticality and regulatory requirements
• Fiber cable: Physical damage inspection, typically only necessary after construction or maintenance activities

6.6 How Do Fiber Optic Temperature Sensors Compare in Price?

Initial investment comparison versus traditional sensors:

Sensortyp	Kosten pro Punkt	Installationskosten	10-Year TCO
Thermoelement (Typ K)	$20-$50	$100-$200	$500-$800 (includes replacements, Kalibrierung)
FTE (Pt100)	$50-$150	$150-$300	$600-$1,000
Infrared sensor	$200-$800	$100-$200	$800-$1,500 (erfordert eine regelmäßige Kalibrierung)
Glasfaser (Fluoreszenz)	$***-$***	$***-$***	$***-$*** (minimaler Wartungsaufwand, kein Drift)
Glasfaser (FBG)	$200-$500	$200-$400	$600-$1,200

While initial fiber optic temperature sensor price may exceed conventional alternatives, total cost of ownership typically favors optical sensors due to superior reliability, elimination of EMI-related failures, and extended service life without calibration drift.

6.7 What Software Interfaces Are Available for Data Monitoring?

Modern faseroptischer Temperatursensor systems provide versatile connectivity:

• Stand-alone software: Windows/Linux applications with trending, alarmierend, und Datenprotokollierung
• SCADA-Integration: Modbus TCP/RTU, OPC UA, Profibus DP, Ethernet/IP protocols
• Cloud connectivity: MQTT, REST APIs for remote monitoring and mobile app access
• Analoge Ausgänge: 4-20mA or 0-10V for legacy control system integration
• Industrielles IoT: Edge computing gateways with predictive analytics capabilities

6.8 Where Can You Access Technical Documentation and Specifications?

Seriös Hersteller provide comprehensive resources:

• Product datasheets: Detaillierte Spezifikationen, dimensional drawings, performance curves
• Application notes: Installation best practices, calibration procedures, troubleshooting guides
• White papers: Technology comparisons, industry-specific solutions, case study analysis
• Video-Tutorials: Installation demonstrations, software configuration walkthroughs
• CAD models: 3D STEP files for system design integration

Fuzhou Innovation maintains extensive online technical library accessible at www.fjinno.net with 24/7 availability and multilingual support.

Faseroptischer Temperatursensor, Intelligentes Überwachungssystem, Verteilter Glasfaserhersteller in China