Broadband UV Photodiode – SG01L-18
The SG01L-18 is a Silicon Carbide (SiC) broadband UV photodiode engineered with an enlarged active area to achieve higher sensitivity and improved light collection efficiency....
Broadband UV Photodiode – SG01L-18
Large-Area UV Photodiode for High-Sensitivity, Stable, and Long-Term Detection in Industrial and Scientific Applications
The SG01L-18 is a Silicon Carbide (SiC) broadband UV photodiode engineered with an enlarged active area to achieve higher sensitivity and improved light collection efficiency. With a responsivity peak of 0.160 A/W at 280 nm and a broad detection range from 221–358 nm, it ensures accurate ultraviolet measurement while providing excellent visible blindness for interference-free performance. Featuring a large 1 mm² active area, the SG01L-18 is optimised for applications requiring greater signal output, such as low-intensity UV monitoring or large-area exposure detection. The ultra-low dark current of 0.2 fA and capacitance of 120 pF balance noise reduction with reliable signal-to-noise ratios. Operating from −55 °C to +170 °C, it is ideal for long-term use in demanding environments. Applications include flame detection, UV curing, solar radiation monitoring, sterilisation validation, environmental sensing, aerospace, and photonics R&D. The SG01L-18 provides enhanced sensitivity and durability for mission-critical ultraviolet detection.
Understanding Broadband UV Photodiode - SG01L-18
The SG01L-18 broadband UV photodiode combines Silicon Carbide technology with a large 1 mm² active area, offering increased sensitivity and superior signal output. Designed for precise ultraviolet detection across the 221–358 nm range with a responsivity peak of 0.160 A/W at 280 nm, it ensures selective UV measurement while maintaining strong visible blindness. Its large area design is especially suited for applications requiring higher photon capture, such as low-light UV environments or large-beam exposure detection. With ultra-low dark current and stable operation across −55 °C to +170 °C, the SG01L-18 is a reliable, high-sensitivity solution for industrial and scientific monitoring.
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 Sensitivity
The SG01L-18 is equipped with a 1 mm² active area, significantly larger than standard photodiodes, allowing it to capture more photons and provide stronger signal output.
Silicon Carbide UV Selectivity
Built with SiC, the photodiode responds only to UV radiation in the 221–358 nm range, while completely rejecting visible and infrared light. This ensures reliable, interference-free UV detection.
High Responsivity and Strong Signal Output
With a responsivity of 0.160 A/W at 280 nm and a large active area, the SG01L-18 is capable of producing higher photocurrent, making it ideal for low-intensity UV measurements.
Low Noise and Stable Performance
The ultra-low dark current of 0.2 fA ensures minimal noise, while the increased capacitance of 120 pF supports balanced performance for its large-area design.
Durable and Thermally Resilient
Operating between −55 °C and +170 °C, the SG01L-18 withstands extreme industrial, aerospace, and outdoor environments, ensuring consistent performance in mission-critical applications.
Long-Term Stability
Its SiC-based design resists UV degradation, providing stable responsivity across extended use, reducing maintenance costs, and ensuring long service life.
By combining large-area sensitivity, robust design, and UV selectivity, the SG01L-18 is an excellent choice for applications requiring high signal levels and durability.
Applications Across Industries
Environmental Monitoring
The SG01L-18 is well-suited for solar UV radiation tracking, ozone analysis, and climate research. Its large active area ensures accurate readings, even under weak UV conditions.
Industrial Flame Detection
Its high sensitivity makes it effective for flame monitoring in refineries, power plants, and factories, where detecting even faint UV emissions is critical.
Medical and Laboratory Applications
It supports sterilisation validation, UV dosimetry, and phototherapy calibration, ensuring precise and reliable results in laboratory and medical contexts.
UV Curing in Manufacturing
The device is ideal for monitoring UV curing processes in printing, adhesives, and coatings, ensuring consistent intensity levels and improved product quality.
Photonics and Semiconductor Research
Laboratories use the SG01L-18 for characterising UV-sensitive materials, testing photonic devices, and developing next-generation optical technologies. Its large active area enhances detection reliability in R&D setups.
Aerospace and Defence
Its wide operating temperature range and high sensitivity make it suitable for aerospace UV monitoring, arc detection, and defence-grade sensing applications.
The SG01L-18 combines large-area detection with high sensitivity and ruggedness, making it a versatile broadband UV photodiode across industries.
Why Choose United Spectrum Instruments?
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Authorised distributor of SGLUX UV photodiodes in India
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Local inventory ensures quick delivery and reduced lead times
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Competitive pricing tailored for research and industry
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Expert consultation and application-specific integration support
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Comprehensive pan-India after-sales service and technical training
FAQs
What is the main advantage of the SG01L-18?
Its large 1 mm² active area provides higher sensitivity and stronger signal output.
What is the peak responsivity?
It achieves 0.160 A/W at 280 nm.
Can it handle low-intensity UV detection?
Yes, the large active area ensures excellent performance in low-light conditions.
What are its typical applications?
Flame detection, UV curing, solar monitoring, ozone research, sterilisation control, and aerospace sensing.
How does United Spectrum support Indian customers?
By offering fast delivery, expert consultation, and nationwide after-sales support.
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FAQs
What is the main advantage of the SG01L-18?
Its large 1 mm² active area provides higher sensitivity and stronger signal output.
What is the peak responsivity?
It achieves 0.160 A/W at 280 nm.
Can it handle low-intensity UV detection?
Yes, the large active area ensures excellent performance in low-light conditions.
What are its typical applications?
Flame detection, UV curing, solar monitoring, ozone research, sterilisation control, and aerospace sensing.
How does United Spectrum support Indian customers?
By offering fast delivery, expert consultation, and nationwide after-sales support.
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