Broadband UV Photodiode – SG01L-18S
The SG01L-18S is a Silicon Carbide (SiC) broadband UV photodiode designed with a large 1 mm² active area for enhanced sensitivity and reliable ultraviolet detection....
Broadband UV Photodiode – SG01L-18S
Large-Area UV Photodiode with High Sensitivity, Stability, and Long-Term Performance for Demanding Industrial Applications
The SG01L-18S is a Silicon Carbide (SiC) broadband UV photodiode designed with a large 1 mm² active area for enhanced sensitivity and reliable ultraviolet detection. With a peak responsivity of 0.160 A/W at 280 nm and a broad detection range between 221–358 nm, it delivers accurate, interference-free UV measurement thanks to its excellent visible blindness. The large active area increases photon capture efficiency, making it suitable for low-intensity UV monitoring and wide-beam detection applications. With an ultra-low dark current of 0.2 fA and capacitance of 120 pF, the SG01L-18S provides stable, low-noise performance with dependable signal-to-noise ratios. Operating across −55 °C to +170 °C, the device performs reliably in extreme industrial, aerospace, and outdoor conditions. Applications include solar radiation monitoring, ozone research, sterilisation validation, flame detection, UV curing control, photonics development, and defence sensing. The SG01L-18S is built for high sensitivity, long-term reliability, and rugged use in mission-critical environments.
Understanding Broadband UV Photodiode - SG01L-18S
The SG01L-18S combines a large 1 mm² active area with SiC broadband UV detection technology, offering enhanced sensitivity and high signal output. With a peak responsivity of 0.160 A/W at 280 nm and detection coverage from 221–358 nm, it ensures precise UV-only measurements with excellent visible blindness. The large area design is ideal for applications where more photon collection is required, such as low-intensity UV environments or wide-beam exposure monitoring. Its ultra-low dark current (0.2 fA) and capacitance (120 pF) provide stable, low-noise detection. With rugged construction and operation between −55 °C to +170 °C, the SG01L-18S is reliable in critical industrial and research applications.
Technical Specifications
| Feature | Specification |
| Typical Responsivity at Peak Wavelength | 0.160 A/W |
| Wavelength of Max. Responsivity | 280 nm |
| Responsivity Range (S = 0.1 × Smax) | 221 … 358 nm |
| Visible Blindness (Smax / S>405 nm) | > 10¹⁰ |
| Active Area | 1.00 mm² |
| Dark Current (1 V reverse bias) | 0.2 fA |
| Capacitance | 120 pF |
| Short Circuit (10 mW/cm² at peak) | 16 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
Large Active Area for High Photon Capture
The SG01L-18S features a 1 mm² active area, enabling greater light collection and stronger photocurrent. This makes it especially effective in low-UV environments or wide-area monitoring applications.
Silicon Carbide UV Selectivity
Using SiC material, the device achieves selective detection of UV radiation within 221–358 nm, while completely rejecting visible and infrared light. This ensures clean, interference-free UV measurement.
High Sensitivity and Responsivity
With a responsivity of 0.160 A/W at 280 nm, the SG01L-18S delivers strong signal levels suitable for both scientific and industrial precision applications.
Low Dark Current and Stable Performance
An ultra-low dark current of 0.2 fA ensures minimal background noise. Despite the larger capacitance of 120 pF (due to its active area), the device maintains reliable, stable operation.
Rugged Construction with Wide Temperature Tolerance
The device operates between −55 °C and +170 °C, making it suitable for outdoor environments, aerospace missions, and harsh industrial conditions.
Long-Term Stability Against UV Degradation
Engineered for stability, the SG01L-18S provides consistent responsivity even under prolonged exposure to UV light, ensuring long operational lifetimes.
Overall, the SG01L-18S offers high sensitivity, large-area detection, and durability, making it a powerful tool for mission-critical UV sensing applications.
Applications Across Industries
Environmental Monitoring
The SG01L-18S is valuable in solar UV measurement, ozone layer studies, and atmospheric monitoring. Its large active area ensures strong, accurate signal collection, even in weak UV conditions.
Industrial Flame Detection
Its sensitivity makes it effective in flame monitoring for power plants, refineries, and manufacturing, where fast and accurate detection is essential for safety.
Medical and Laboratory Applications
The device supports UV sterilisation validation, dosimetry, and phototherapy calibration. Its accuracy ensures compliance with healthcare standards and reliable research outcomes.
UV Curing in Manufacturing
In production lines for printing, adhesives, and coatings, the SG01L-18S ensures precise UV curing process monitoring, enhancing efficiency, repeatability, and product quality.
Photonics and Semiconductor Research
Research institutions benefit from the SG01L-18S in testing UV-sensitive materials, evaluating optical devices, and developing advanced photonic technologies. Its high signal output makes it particularly suitable for R&D environments.
Aerospace and Defence
With a rugged design and ability to perform in extreme conditions, the SG01L-18S supports aerospace UV monitoring, arc detection, and defence-grade UV sensing.
By combining large-area sensitivity, robust construction, and stable performance, the SG01L-18S is trusted across diverse industries for accurate ultraviolet detection.
Why Choose United Spectrum Instruments?
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Official distributor of SGLUX UV photodiodes in India
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Local stock ensures quick delivery and reduced lead times
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Competitive pricing for academic, defence, and industrial clients
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Technical consultation for application-specific integration
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Pan-India after-sales service, training, and support
FAQs
What is the active area of the SG01L-18S?
It has a large 1 mm² active area for higher photon capture.
What is the peak responsivity?
The device delivers 0.160 A/W at 280 nm.
What are its typical applications?
Solar UV monitoring, flame detection, sterilisation, UV curing, photonics research, and aerospace sensing.
Can it operate in extreme environments?
Yes, it works reliably from −55 °C to +170 °C.
How does United Spectrum support Indian customers?
United Spectrum provides fast delivery, expert consultation, and nationwide after-sales service.
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FAQs
What is the active area of the SG01L-18S?
It has a large 1 mm² active area for higher photon capture.
What is the peak responsivity?
The device delivers 0.160 A/W at 280 nm.
What are its typical applications?
Solar UV monitoring, flame detection, sterilisation, UV curing, photonics research, and aerospace sensing.
Can it operate in extreme environments?
Yes, it works reliably from −55 °C to +170 °C.
How does United Spectrum support Indian customers?
United Spectrum provides fast delivery, expert consultation, and nationwide after-sales service.


