Optical Sensors & Detector – UV Calibration
UV Calibration, Determination Of Spectral Sensitivity
Precision UV Calibration System for Determination of Spectral Sensitivity in UV Detectors and Optical Sensors
The UV Calibration System for Determination of Spectral Sensitivity is a laboratory-grade solution engineered for precise measurement of detector response across ultraviolet wavelengths. It enables accurate characterisation of photodiodes, radiometers, and optical sensors by determining their spectral responsivity (A/W) from 200 to 400 nm. The system incorporates a monochromator-based UV source, calibrated reference detectors, and stabilised optical power control, ensuring reproducible, traceable measurements. Each setup is calibrated against NIST/PTB reference standards, providing reliable results for research, quality assurance, and sensor manufacturing. The system supports the calibration of UVA, UVB, and UVC detectors used in environmental monitoring, sterilisation, material testing, and phototherapy. By providing precise spectral response curves, it helps engineers and researchers optimise sensor design, verify filter characteristics, and ensure conformity with ISO/CIE metrological standards.
Understanding UV Calibration, Determination Of Spectral Sensitivity
The Determination of Spectral Sensitivity System measures how a UV sensor’s electrical output varies with wavelength. Using a monochromator that isolates narrow UV bands, it illuminates the test sensor and a calibrated reference detector simultaneously. The ratio of their signals provides the absolute spectral responsivity (A/W) at each wavelength, forming a complete sensitivity curve. This process identifies the detector’s peak wavelength, cutoff limits, and uniformity, critical for high-accuracy UV measurement instruments. Traceability to NIST/PTB ensures international calibration compatibility. The system supports both single-detector analysis and batch testing, providing essential data for UV sensor validation, R&D, and certification.
Technical Specifications
| Feature | Specification |
| Measurement Parameter |
Spectral Responsivity (A/W) vs. Wavelength
|
| Spectral Range |
200 – 400 nm (UVC, UVB, UVA)
|
| Light Source |
Deuterium / Xenon Lamp (stabilised)
|
| Monochromator Bandwidth | 1 – 5 nm (adjustable) |
| Reference Detector |
Calibrated SiC or GaP Photodiode (NIST/PTB)
|
| Test Detector Interface |
Universal Mount with Adjustable Optics
|
| Wavelength Step Resolution |
0.1 – 1 nm (user-selectable)
|
| Optical Output Stability | < ±1% over 8 hours |
| Measurement Accuracy | ±2% (typical) |
| Data Output |
Responsivity Table and Curve (A/W vs nm)
|
| Calibration Reference |
NIST / PTB Traceable
|
| Software Features |
Real-Time Plotting, Curve Fitting, Export (CSV/PDF)
|
| Power Supply | 230 V AC / 50 Hz |
| Operating Temperature |
20 … 25 °C (controlled environment)
|
Key Features and Advantages
High-Precision Monochromatic Illumination
The system uses a stabilised UV light source and precision monochromator to generate wavelength-specific radiation, ensuring narrowband spectral analysis for accurate responsivity determination.
Traceable Reference Calibration
Each setup is calibrated against NIST or PTB reference detectors, guaranteeing international traceability and long-term measurement consistency.
Comprehensive Spectral Responsivity Mapping
It measures detector output from 200–400 nm, identifying peak sensitivity, bandwidth, cutoff regions, and wavelength-dependent response variations.
Software-Driven Analysis
The integrated software automates wavelength scanning, data acquisition, responsivity plotting, and comparison against theoretical models, saving significant analysis time.
Multi-Detector Testing Capability
Supports sequential or simultaneous characterisation of multiple photodiodes, radiometers, or UV sensors with identical optical exposure conditions.
Stable Optical Output and Repeatability
Temperature-regulated lamps and low-noise electronics ensure excellent signal stability and reproducibility over long testing periods.
Industrial and Research Applications
Ideal for manufacturers of UV photodiodes, environmental sensors, radiometers, and optical materials requiring calibration verification and spectral qualification.
By combining precision optics, traceable calibration, and advanced data acquisition, this system delivers dependable spectral sensitivity determination for both R&D and production-level testing environments.
Applications Across Industries
Sensor Manufacturing and Quality Control
Used by photodiode and radiometer manufacturers to verify spectral response accuracy and batch-to-batch consistency.
Calibration Laboratories and Metrology Institutes
Provides absolute calibration of UV detectors and reference standards for traceability assurance.
Environmental and Atmospheric Monitoring
Determines spectral sensitivity of UV sensors used for solar UV Index and ozone layer monitoring.
Medical and Phototherapy Equipment Validation
Ensures UV detectors in phototherapy or sterilisation equipment meet the required spectral performance specifications.
Material and Coating Research
Evaluates how materials absorb or transmit UV radiation across different wavelengths, aiding filter and lens design.
Industrial Process Monitoring
Supports calibration of UV sensors used in curing, semiconductor exposure, and disinfection systems.
By offering complete wavelength-dependent analysis and international calibration traceability, the system forms an essential tool for UV detector characterisation and certification across scientific, industrial, and regulatory environments.
Why Choose United Spectrum Instruments?
-
Official distributor of advanced UV calibration systems in India
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Calibration traceability to NIST/PTB for global standard compliance
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Expert consultation for detector characterisation and lab integration
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Competitive pricing with support for OEM, R&D, and QA setups
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Local service, software training, and annual recalibration support
FAQs
What does spectral sensitivity determination mean?
It defines how a sensor’s electrical output changes with wavelength, expressed as responsivity (A/W).
Which UV bands are covered?
UVC (200–280 nm), UVB (280–315 nm), and UVA (315–400 nm).
What standards are followed?
All calibrations are traceable to NIST or PTB international metrology standards.
Can multiple detectors be tested simultaneously?
Yes, the system supports comparative or sequential measurements for multiple UV sensors.
How does United Spectrum support customers in India?
By providing traceable calibration, expert guidance, software setup, and nationwide service support.
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FAQs
What does spectral sensitivity determination mean?
It defines how a sensor’s electrical output changes with wavelength, expressed as responsivity (A/W).
Which UV bands are covered?
UVC (200–280 nm), UVB (280–315 nm), and UVA (315–400 nm).
What standards are followed?
All calibrations are traceable to NIST or PTB international metrology standards.
Can multiple detectors be tested simultaneously?
Yes, the system supports comparative or sequential measurements for multiple UV sensors.
How does United Spectrum support customers in India?
By providing traceable calibration, expert guidance, software setup, and nationwide service support.
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