Optical Sensors & Detector – UV Photodetectors
UVC Photodetector – TOCON_C3UVC

High-Precision UVC Photodetector with Integrated Amplifier for Germicidal UV and Disinfection Systems
The TOCON_C3UVC from SGLUX GmbH is a precision UVC photodetector incorporating a silicon carbide (SiC) sensor and internal amplifier that directly yields a 0–5 V output proportional to incident UVC irradiance. It is suited for low-level UVC measurement in UV disinfection, lamp monitoring, germicidal dose control, and sterilization processes. Its spectral sensitivity is restricted to the 225–287 nm range (peak ~275 nm), suppressing sensitivity to longer UVA/UVB or visible wavelengths. The device features a narrow dynamic range (approx. 180 pW/cm² to 1.8 µW/cm²) to maintain high linearity and stability in low-intensity UVC environments. Housed in a hermetically sealed TO5 metal package with lens cap, the TOCON_C3UVC is compact, robust, and maintenance-free. The photodetector is ideal for integration into UV process control systems, validation rigs, and intelligent disinfection controllers.
Understanding UVC Photodetector - TOCON_C3UVC
The TOCON_C3UVC uses a SiC photodiode optimized for the deep-UV (UVC) spectral band. With its integrated transimpedance amplifier, it produces a clean, linear 0–5 V output that scales with UV irradiance, simplifying interfacing to data acquisition, microcontrollers, or monitoring systems. Its narrow sensitivity band (centered ~275 nm) ensures it responds primarily to germicidal radiation. The detection limits—down to ~180 pW/cm² and saturating beyond ~1.8 µW/cm² at 254 nm—make it well matched to many disinfection systems. The sealed TO5 housing ensures environmental protection and stability under typical lab or industrial use.
Technical Specifications
| Feature | Specification |
|---|---|
| Function | UVC photodetector with integrated amplifier |
| Detector Type | SiC photodiode + internal amplifier |
| Spectral Range | ~ 225 – 287 nm (UVC) |
| Peak Wavelength | ~ 275 nm |
| Output Signal | 0 – 5 V DC (linear with irradiance) |
| Sensitivity / Dynamic Range | ~180 pW/cm² (min) to ~1.8 µW/cm² (max, saturation) |
| Response Time / Bandwidth | Fast (typical internal amplifier) |
| Operating Voltage | Typically 5 V supply (0–5 V output) |
| Operating Temperature | –20 … +85 °C (typical) |
| Housing | Hermetically sealed TO5 metal package with lens cap |
| Calibration | Uncalibrated as-shipped; individual calibration service available |
| Connector / Output | Standard BNC / custom cable or pinout per TOCON standard |
Key Features and Advantages
Strict UVC Selectivity and IR/Visible Rejection
The TOCON_C3UVC is engineered for narrowband UVC detection. Its SiC photodiode is sensitive primarily in the 225–287 nm band, with a peak response near 275 nm (per DVGW / DIN norms) This ensures minimal cross-sensitivity to UVA, UVB, or visible light — critical in applications where accurate germicidal dose measurement is required without interference from ambient lighting or window leakage.
Integrated Low-Noise Amplification
The detector includes a built-in transimpedance amplifier directly within the TO5 housing, outputting a 0–5 V signal proportional to irradiance. This design reduces parasitic noise pickup, simplifies wiring, and allows direct interface with controllers, data loggers, or process control units.
Optimized for Low-Level UVC Intensity
With a lower detection limit of ~180 pW/cm² and a saturation threshold near ~1.8 µW/cm² (at 254 nm), the TOCON_C3UVC is tailored to mid-range UVC measurements often seen in disinfection or germicidal systems . By choosing an amplifier gain matched to expected irradiance levels, users can operate in a largely linear region, avoiding output clipping or nonlinearity.
Compact, Robust, and Hermetically Sealed
Housed in a TO5 metal can with a lens cap, the photodetector is compact and rugged, suitable for integration in tight spaces or harsh industrial environments. The sealed design protects internal electronics from dust, humidity, and contaminants, ensuring long-term stability and reliability.
Flexible Calibration and Serviceability
While shipped uncalibrated, SGLUX offers optional individual calibration with traceable certification. This enables customers to match the TOCON_C3UVC output to absolute irradiance measurement standards in their own systems.
Plug-and-Play Integration into UVC Systems
Thanks to its standardized 0–5 V output, the TOCON_C3UVC can be easily integrated into UV process controllers, PLCs, microcontroller boards, or monitoring dashboards. No external amplifier is required.
In summary, the TOCON_C3UVC offers high precision, narrowband UVC sensitivity, and straightforward interfacing — making it a dependable sensor for disinfection control, germicidal dose verification, and UVC process automation.
Applications Across Industries
UV Disinfection & Sterilization Control
In water, air, or surface sterilization systems, maintaining accurate UVC dose is essential to ensure microbial inactivation. The TOCON_C3UVC can monitor real-time irradiance inside lamps or reactors, enabling closed-loop feedback control of lamp power, shuttering, or dwell times.
Lamp Validation & Performance Monitoring
Manufacturers of low-pressure mercury, excimer, or UV-C LED sources can use the detector during R&D, QA, or burn-in to verify UVC output over time, detect drift, and ensure consistency between units.
Safety and Shield Leakage Monitoring
In systems where stray UVC leakage must be controlled for personnel safety, the TOCON_C3UVC can monitor ambient UVC levels near enclosures or shielding to ensure safety thresholds are never exceeded.
Germicidal Dose Mapping & Validation
For validation of sterilization systems (e.g. reactors, chambers), spatial maps of UVC irradiance are necessary. The small form factor of the TOCON_C3UVC enables positioning in multiple points to measure dose uniformity.
Surface Disinfection and Curing Systems
In disinfection or UV curing lines (e.g. conveyor systems), this photodetector can track UVC exposure levels to ensure consistent exposure per area or object, adjusting lamp power or speed dynamically.
Biological / Photobiology Research
Researchers studying microbial or cell responses to UVC irradiation can use the TOCON_C3UVC to monitor exact germicidal dose levels reaching samples, ensuring reproducibility across experiments.
Industrial Process Integration & Automation
Because of its 0–5 V output compatibility, the TOCON_C3UVC integrates easily into process control architectures (PLCs, SCADA, microcontrollers). It helps automate lamp aging control, safety interlocks, and maintenance alerts based on UVC exposure trends.
By combining narrowband UVC sensitivity, robust packaging, simple interfacing, and optional calibration, the TOCON_C3UVC is well suited for deployment across industries from water treatment and air sterilization to medical device validation, cleanroom systems, and laboratory photobiology setups.
Why Choose United Spectrum Instruments?
As the exclusive Indian partner for SGLUX, United Spectrum Instruments provides direct access to the TOCON_C3UVC photodetector, backed by local support and calibration services. We maintain alignment with international standards, offering NIST/PTB-traceable calibration for Indian laboratories. Our in-country technical team aids in system integration, electromechanical design, software interfacing, and post-sales support. Whether for OEM deployments or research-grade instrumentation, we deliver prompt service, spares, and customized options across India.
FAQs
What is the effective wavelength range of TOCON_C3UVC?
It is sensitive primarily between ~225 and 287 nm, with peak response around 275 nm, ideal for germicidal UVC measurement.
Does the device measure UVA or visible light?
No — its design suppresses longer-wavelength sensitivity, focusing on UVC only (strong rejection of UVA/UVB/visible).
Do I need an external amplifier?
No. It includes a built-in amplifier and outputs a direct 0–5 V signal.
Is calibration included?
By default the device is uncalibrated; optional calibrated units or calibration services are available
Can I interface it with my PLC or microcontroller?
Yes — the 0–5 V output is directly compatible with PLC analog inputs, microcontroller ADCs, data loggers, or instrumentation.
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FAQs
What is the effective wavelength range of TOCON_C3UVC?
It is sensitive primarily between ~225 and 287 nm, with peak response around 275 nm, ideal for germicidal UVC measurement.
Does the device measure UVA or visible light?
No — its design suppresses longer-wavelength sensitivity, focusing on UVC only (strong rejection of UVA/UVB/visible).
Do I need an external amplifier?
No. It includes a built-in amplifier and outputs a direct 0–5 V signal.
Is calibration included?
By default the device is uncalibrated; optional calibrated units or calibration services are available
Can I interface it with my PLC or microcontroller?
Yes — the 0–5 V output is directly compatible with PLC analog inputs, microcontroller ADCs, data loggers, or instrumentation.