Optical Sensors & Detector – UV Photodiodes
UVC Photodiode – SG01D-C18UVC
Large-Area UVC Photodiode for Industrial, Medical, Environmental, Aerospace, and Scientific Germicidal Monitoring Applications
The SG01D-C18UVC is a Silicon Carbide (SiC)-based UVC photodiode engineered for highly accurate detection of germicidal wavelengths in the 220–280 nm range. Featuring a large 2.0 mm² active area, it delivers significantly higher photocurrents than compact or medium-area models, making it suitable for applications that require maximum sensitivity. With a peak responsivity of 0.10 A/W at 265 nm, ultra-low dark current (0.1 fA), and capacitance of 200 pF, the SG01D-C18UVC ensures stable, noise-free signals with fast response times. Its visible blindness eliminates interference from visible and infrared radiation, enabling pure UVC detection. Built to withstand harsh conditions, it operates reliably across −55 °C to +170 °C, ensuring durability in industrial, aerospace, defence, and research environments. Typical applications include UVC LED monitoring, sterilisation validation, lamp calibration, environmental safety systems, water and air purification, and germicidal research studies requiring high-sensitivity detection.
Understanding UVC Photodiode - SG01D-C18UVC
The SG01D-C18UVC is a large-area photodiode specifically designed for precise detection of germicidal UVC radiation between 220–280 nm. With its 2.0 mm² active area, it delivers strong photocurrents, providing maximum sensitivity for applications such as sterilisation monitoring and environmental disinfection validation. Peak responsivity of 0.10 A/W at 265 nm ensures accuracy in germicidal radiation studies. Its Silicon Carbide design guarantees complete visible blindness, rejecting IR and visible wavelengths for pure UVC-only detection. With ultra-low dark current (0.1 fA) and 200 pF capacitance, the device offers stable, noise-free, and fast responses. Reliable across −55 °C to +170 °C, it supports industrial, aerospace, and scientific use.
Technical Specifications
| Feature | Specification |
| Spectral Range (UVC Specific) | 220 … 280 nm |
| Peak Responsivity | 0.10 A/W at 265 nm |
| Visible Blindness | > 10¹⁰ |
| Active Area | 2.0 mm² |
| Dark Current (1 V reverse bias) | 0.1 fA |
| Capacitance | 200 pF |
| Short Circuit (10 mW/cm² at peak) | 19 µA |
| Temperature Coefficient | < 0.1 %/K |
| Operating Temperature | −55 … +170 °C |
| Storage Temperature | −55 … +170 °C |
| Soldering Temperature (3 s) | 260 °C |
| Maximum Reverse Voltage | 20 V |
Key Features and Advantages
UVC-Specific Responsivity
The SG01D-C18UVC is optimised for germicidal UVC detection between 220–280 nm, with peak sensitivity at 265 nm, ensuring accurate sterilisation monitoring.
Large Active Area for Maximum Sensitivity
With its 2.0 mm² active area, the device generates strong photocurrents, making it ideal for applications requiring high sensitivity and reliable detection even at low intensities.
High Signal Purity
Silicon Carbide construction ensures visible blindness, eliminating interference from visible and IR light to provide true UVC-only detection.
Noise-Free Operation
An ultra-low dark current of 0.1 fA guarantees highly stable, noise-free signals, essential for sensitive UVC monitoring.
Fast Response Performance
With 200 pF capacitance, the device provides reliable responsiveness, suitable for real-time monitoring of disinfection systems.
Thermal Reliability
Operating across −55 °C to +170 °C, it maintains consistent performance in aerospace, defence, and industrial conditions.
Long-Term Stability
The SiC material ensures resistance to UVC degradation, maintaining calibration accuracy and dependable long-term use.
By combining large-area sensitivity, rugged thermal stability, and precise UVC selectivity, the SG01D-C18UVC stands as a high-performance solution for critical germicidal monitoring.
Applications Across Industries
Medical and Healthcare
The SG01D-C18UVC is applied in UVC sterilisation monitoring, hospital disinfection systems, and phototherapy calibration, ensuring accurate germicidal performance.
Industrial Sterilisation
It validates UVC lamps and LEDs in pharmaceutical facilities, cleanrooms, and food packaging systems requiring reliable monitoring.
Environmental Monitoring
The photodiode supports UVC water purification, air sterilisation, and safety compliance in environmental applications.
Scientific Research
Researchers employ it for optical characterisation of UVC sources, germicidal material testing, and photonics studies.
Aerospace and Defence
Its ruggedness and wide operating temperature range make it ideal for aerospace-grade UVC detection and defence monitoring systems.
Workplace and Safety Systems
It integrates into safety meters and portable UVC monitoring systems for occupational and environmental exposure regulation.
By delivering large-area responsivity, rugged construction, and wavelength-selective accuracy, the SG01D-C18UVC provides unmatched reliability across industries.
Why Choose United Spectrum Instruments?
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Official distributor of SGLUX UVC photodiodes in India
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Local stock ensures quick delivery and reduced lead times
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Competitive pricing for medical, industrial, and research sectors
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Application-specific consultation for UVC integration and monitoring systems
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Nationwide after-sales service, technical support, and training
FAQs
What spectral range does the SG01D-C18UVC detect?
It covers UVC radiation from 220–280 nm.
What is its active area size?
It features a large 2.0 mm² active area for maximum sensitivity.
Does it eliminate visible and IR interference?
Yes, it provides complete visible blindness for pure UVC-only detection.
Can it operate in extreme conditions?
Yes, it performs reliably from −55 °C to +170 °C.
How does United Spectrum support Indian customers?
By offering local stock, fast delivery, competitive pricing, and pan-India after-sales service.
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FAQs
What spectral range does the SG01D-C18UVC detect?
It covers UVC radiation from 220–280 nm.
What is its active area size?
It features a large 2.0 mm² active area for maximum sensitivity.
Does it eliminate visible and IR interference?
Yes, it provides complete visible blindness for pure UVC-only detection.
Can it operate in extreme conditions?
Yes, it performs reliably from −55 °C to +170 °C.
How does United Spectrum support Indian customers?
By offering local stock, fast delivery, competitive pricing, and pan-India after-sales service.
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