Optical Sensors & Detector – UV Photodetectors
Galliumphosphide (GaP) Photodetector – TOCON_GAP9
TOCON_GAP9 – Gallium Phosphide Photodetector for Precision Visible and Near-UV Light Measurement Applications
The TOCON_GAP9 from SGLUX GmbH is a high-precision Gallium Phosphide (GaP) photodetector designed for visible and near-UV light measurement with superior spectral selectivity.
It integrates a solar-blind GaP photodiode and a low-noise transimpedance amplifier within a rugged TOCON housing, producing a 0–5 V DC output linear to incident irradiance.
With a spectral sensitivity range from 150 nm to 550 nm and peak response near 440 nm, it is ideal for UV-A, violet, and blue light detection.
Each sensor is factory-calibrated and traceable to NIST / PTB standards, ensuring high accuracy, reproducibility, and long-term stability.
The TOCON_GAP9 is widely used in LED testing, fluorescence analysis, optical instrumentation, and UV curing control, offering robust performance for both industrial and scientific applications.
Understanding Galliumphosphide (GaP) Photodetector - TOCON_GAP9
The TOCON_GAP9 uses a Gallium Phosphide (GaP) photodiode known for its visible and near-UV light sensitivity while being insensitive to infrared radiation.
This property ensures precise detection of blue and UV-A radiation without unwanted IR interference.
The built-in low-noise amplifier provides a 0–5 V analog output, simplifying integration with PLCs, data acquisition systems, or the SGLUX SENSOR MONITOR 5.0.
Factory-calibrated to NIST / PTB standards, the TOCON_GAP9 ensures traceable, repeatable performance in LED photometry, process control, and fluorescence measurement where blue-region precision is essential.
Technical Specifications
| Feature | Specification |
| Function |
Gallium Phosphide (GaP) photodetector with integrated amplifier
|
| Detector Type |
GaP photodiode with internal transimpedance amplifier
|
| Spectral Range |
150 – 550 nm (visible and near-UV)
|
| Peak Wavelength | 440 nm |
| Output Signal |
0 – 5 V DC (linear with irradiance)
|
| Sensitivity |
High for blue and near-UV light
|
| Accuracy | ±5 % of reading |
| Response Time | < 1 s |
| Visible / IR Rejection |
Excellent IR blindness
|
| Operating Voltage | 5 – 24 V DC |
| Operating Temperature | −20 … +85 °C |
| Housing Material |
Anodised aluminium TOCON enclosure
|
| Optical Window |
UV-grade quartz or 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/UV-A light measurement, fluorescence detection, LED testing, optical instrumentation, UV curing control
|
Key Features and Advantages
Wide Spectral Sensitivity (150–550 nm)
The TOCON_GAP9 covers both near-UV and visible blue wavelengths, providing precise measurements in the transition region where standard Si or SiC detectors are less effective.
Infrared Blindness for True UV/Visible Detection
Its GaP detector ensures strong rejection of IR and red light, enabling pure spectral accuracy for UV-A and blue-light sources.
Factory-Calibrated Accuracy
Each unit is NIST / PTB traceable, ensuring reproducible, validated results suitable for scientific, industrial, and regulatory use.
Integrated Low-Noise Amplifier
The built-in transimpedance amplifier outputs a linear 0–5 V signal, eliminating the need for external circuitry or gain adjustment.
Fast Response and Low Drift
The solid-state GaP detector offers sub-second response with excellent signal stability over temperature and time.
Compact and Durable Construction
Encased in a robust anodised aluminium TOCON housing, providing resistance to mechanical and environmental stress.
Flexible Integration
Easily connects to SGLUX SENSOR MONITOR 5.0, VOLTCON, or SGCD4 controllers for real-time readout or data logging.
The TOCON_GAP9 offers outstanding spectral precision, traceable calibration, and fast output, making it the sensor of choice for blue-light metrology, UV-A testing, and optical process validation.
Applications Across Industries
LED and Laser Testing
Used for output characterisation of UV-A and blue LEDs, ensuring consistent optical power and colour rendering.
Fluorescence and Photoluminescence Measurement
Monitors excitation light in fluorescence spectroscopy and optical bioassay systems.
Optical Instrumentation and Calibration
Acts as a reference detector in photometric and radiometric calibration setups.
UV Curing and Process Monitoring
Measures blue/UV-A irradiance in curing systems for adhesives, coatings, and inks.
Scientific and Laboratory Research
Supports spectral analysis, photobiology, and material testing in visible/UV regions.
Environmental and Lighting Studies
Evaluates daylight or artificial blue-light exposure in lighting research and safety compliance testing.
With its IR-blind GaP sensor, traceable calibration, and robust design, the TOCON_GAP9 ensures accurate and repeatable measurements for industrial, research, and optical engineering applications.
Why Choose United Spectrum Instruments?
-
Exclusive distributor of SGLUX TOCON_GAP9 in India
-
Expertise in visible and near-UV light metrology systems
-
Local calibration traceable to NIST / PTB standards
-
Competitive solutions for LED testing, photometry, and fluorescence research
-
Pan-India integration, calibration, and technical support
FAQs
What makes the TOCON_GAP9 unique?
It uses a Gallium Phosphide (GaP) detector, sensitive to blue and UV-A light but blind to IR.
What spectral range does it cover?
It measures from 150 nm to 550 nm, peaking near 440 nm.
Is it factory-calibrated?
Yes – every unit is factory-calibrated and traceable to NIST/PTB standards.
Can it detect LED light sources?
Yes – ideal for UV-A and blue LED power measurement and calibration.
How does United Spectrum support Indian customers?
Through system integration, calibration, and nationwide service for optical and radiometric applications.
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FAQs
What makes the TOCON_GAP9 unique?
It uses a Gallium Phosphide (GaP) detector, sensitive to blue and UV-A light but blind to IR.
What spectral range does it cover?
It measures from 150 nm to 550 nm, peaking near 440 nm.
Is it factory-calibrated?
Yes – every unit is factory-calibrated and traceable to NIST/PTB standards.
Can it detect LED light sources?
Yes – ideal for UV-A and blue LED power measurement and calibration.
How does United Spectrum support Indian customers?
Through system integration, calibration, and nationwide service for optical and radiometric applications.
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