Optical Sensors & Detector – UV Photodetectors
GaP Blue Light Photodetector – TOCON_BLUE4
TOCON_BLUE4 – High-Precision GaP Blue Light Photodetector for LED Testing and Optical Measurement Applications
The TOCON_BLUE4 from SGLUX GmbH is a high-precision Gallium Phosphide (GaP) photodetector specifically engineered for accurate blue-light measurement in industrial, laboratory, and calibration applications.
It features a GaP solar-blind photodiode combined with a low-noise transimpedance amplifier, producing a stable, linear 0–5 V DC output proportional to irradiance.
With a spectral response centered around 440 nm, the detector is optimised for blue LED testing, display calibration, photometric research, and industrial light monitoring.
Its inherent infrared blindness ensures that only blue-visible light is detected without interference from longer wavelengths.
Factory-calibrated and traceable to NIST / PTB standards, the TOCON_BLUE4 guarantees repeatable, traceable performance for optical validation, process control, and photometric testing.
Compact, durable, and plug-and-play ready, it offers unmatched stability and accuracy for blue-light measurement applications.
Understanding GaP Blue Light Photodetector - TOCON_BLUE4
The TOCON_BLUE4 utilises a Gallium Phosphide (GaP) photodiode designed to precisely detect blue-light wavelengths (~440 nm) while rejecting infrared and red-light interference.
This property ensures highly accurate measurements in blue LED and visible-light applications.
The sensor includes an internal low-noise transimpedance amplifier that delivers a linear 0–5 V output, eliminating the need for external amplification.
Each unit is factory-calibrated (NIST/PTB traceable) for guaranteed accuracy.
Ideal for LED output characterisation, display evaluation, and photometric quality assurance, the TOCON_BLUE4 provides stable, fast, and reproducible readings for high-precision optical systems.
Technical Specifications
| Feature | Specification |
|---|---|
| Function | GaP photodetector for precise blue-light measurement |
| Detector Type | Gallium Phosphide photodiode with integrated transimpedance amplifier |
| Spectral Range | 400 – 480 nm |
| Peak Wavelength | 440 nm |
| Output Signal | 0 – 5 V DC (linear with irradiance) |
| Sensitivity | High for blue-light wavelengths |
| Accuracy | ±5 % of reading |
| Response Time | < 1 s |
| Infrared Rejection | Excellent (IR-blind GaP detector) |
| Operating Voltage | 5 – 24 V DC |
| Operating Temperature | −20 … +85 °C |
| Housing Material | Anodised aluminium TOCON enclosure |
| Optical Window | Blue-transparent optical glass |
| Connector | BNC / M8 / custom cable output |
| Calibration | Factory-calibrated, traceable to NIST / PTB |
| Compatibility | SENSOR MONITOR 5.0 / VOLTCON / SGCD4 systems |
| Applications | Blue-light LED testing, display calibration, optical metrology, illumination quality monitoring |
Key Features and Advantages
Dedicated Blue-Light Spectral Response (400–480 nm)
The TOCON_BLUE4 is optimised for precise measurement of blue wavelengths, ensuring accurate irradiance readings in LED testing and photometric analysis.
Infrared and Red-Light Rejection
Thanks to its GaP photodiode, the detector is blind to IR and red light, ensuring clean, accurate blue-light data without background interference.
Integrated Low-Noise Amplifier
Built-in transimpedance amplifier converts photocurrent to voltage, providing a 0–5 V DC signal ready for direct connection to measuring systems.
Factory-Traceable Calibration
Each device undergoes NIST/PTB traceable calibration, ensuring international accuracy standards for reliable optical measurements.
Fast Response and Signal Stability
Delivers sub-second response times and long-term output stability under varying illumination and environmental conditions.
Compact and Durable Construction
Encased in rugged anodised aluminium, ensuring mechanical strength and long service life in both laboratory and field environments.
Easy Integration
Plug-and-play compatible with SENSOR MONITOR 5.0, VOLTCON, and SGCD4, allowing seamless data logging and automation.
The TOCON_BLUE4 combines spectral purity, calibration traceability, and robust design, making it ideal for blue LED metrology, optical research, and illumination quality control.
Applications Across Industries
LED Testing and Calibration
Used for output power measurement and spectral verification of blue LEDs in manufacturing and research.
Display and Screen Evaluation
Measures blue-light emission from displays, monitors, and projectors to ensure safety and performance compliance.
Optical Calibration and Radiometric Research
Acts as a reference detector in blue-light calibration of photometers, radiometers, and optical instruments.
Illumination Monitoring and Quality Control
Monitors blue-light levels in industrial lighting, production environments, and architectural lighting applications.
Photobiological and Vision Research
Used in blue-light exposure analysis for human-eye safety studies and biological response evaluations.
Process Automation and Machine Vision
Ensures consistent illumination feedback in automated inspection and imaging systems.
With its traceable calibration, IR-blind GaP sensor, and precision amplifier, the TOCON_BLUE4 delivers reliable, reproducible, and interference-free blue-light measurements across industries.
Why Choose United Spectrum Instruments?
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Official distributor of SGLUX TOCON_BLUE4 in India
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Expertise in blue-light and visible-range photometric solutions
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Local calibration traceable to NIST / PTB standards
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Competitive and reliable solutions for R&D, OEM, and industrial clients
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Pan-India technical support, calibration, and integration services
FAQs
What wavelength range does TOCON_BLUE4 detect?
It measures 400–480 nm, optimised for blue-light LED applications.
Does it detect infrared or red light?
No – it is IR-blind, providing accurate blue-light measurements without interference.
Is the sensor factory-calibrated?
Yes – it is factory-calibrated and traceable to NIST/PTB standards.
Can it be used for LED and display calibration?
Yes – it’s ideal for blue-LED and display testing applications.
How does United Spectrum support customers in India?
By offering local calibration, integration, and after-sales support for optical and photometric systems.
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Have Any Questions ?
FAQs
What wavelength range does TOCON_BLUE4 detect?
It measures 400–480 nm, optimised for blue-light LED applications.
Does it detect infrared or red light?
No – it is IR-blind, providing accurate blue-light measurements without interference.
Is the sensor factory-calibrated?
Yes – it is factory-calibrated and traceable to NIST/PTB standards.
Can it be used for LED and display calibration?
Yes – it’s ideal for blue-LED and display testing applications.
How does United Spectrum support customers in India?
By offering local calibration, integration, and after-sales support for optical and photometric systems.
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