Download the full United Spectrum catalogue covering laser systems, fume extractors, optical sensors and photonics instruments from leading German manufacturers.

DOWNLOAD NOW!

Gallium Phosphide (GaP) Photodetector – TOCON_GAP9

43A Galliumphosphide (GaP) Photodetector Graph

TOCON_GAP9 – Gallium Phosphide Photodetector for Precision Visible and Near-UV Light Measurement Applications

Brochure

Price

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.

GET IN TOUCH WITH US

Have a Project in Mind ? Let’s Talk

Tell us about your project or requirements. Our business team will review your inquiry and contact you at the earliest.