Optical Sensors & Detector – Transducer for Photodiodes
SGCD4
SGCD4 Four-Channel Signal Conditioner for Precision Amplification and Synchronised Control of Photodiode-Based UV Sensors
The SGCD4 is a high-performance four-channel signal conditioning and control unit developed for multi-sensor UV and optical monitoring systems.
It integrates four independent, low-noise transimpedance amplifiers and digital interface channels in one compact platform, enabling simultaneous processing of multiple photodiodes or radiometric inputs.
Each channel provides selectable gain, offset adjustment, and temperature compensation, ensuring stable, accurate readings across varying light intensities.
Designed to operate with SGLUX SiC, GaP, and Si detectors, the SGCD4 can also interface seamlessly with AMPCON, VOLTCON, and Digiboard modules for complete measurement chains.
With USB and RS-485 outputs, it supports local or networked data acquisition in laboratories, industrial production lines, and environmental UV stations.
Compact, modular, and reliable, the SGCD4 guarantees traceable, low-noise signal amplification for scientific and industrial photonic instrumentation.
Understanding SGCD4
The SGCD4 functions as a central signal processing unit for up to four photodiode sensors.
Each channel contains a precision transimpedance amplifier with user-selectable gain, allowing simultaneous monitoring of different UV bands or spatial locations.
Its architecture ensures low crosstalk and high linearity, critical for accurate multi-point UV intensity or dose measurements.
The integrated microcontroller performs real-time gain control, filtering, and data transmission, simplifying system integration with data loggers, IoT nodes, or PLCs.
Built with industrial-grade stability, the SGCD4 delivers consistent, interference-free output ideal for UV process control, calibration, and environmental monitoring.
Technical Specifications
| Feature | Specification |
|---|---|
| Function | Four-channel transimpedance amplifier and signal conditioner |
| Number of Channels | 4 independent inputs (isolated) |
| Supported Sensors | SiC, GaP, Si photodiodes / voltage-output UV sensors |
| Transimpedance Gain Range | 10⁵ – 10⁹ V/A (selectable per channel) |
| Output Voltage | 0 – 10 V DC (linear per channel) |
| Linearity | ±0.2 % FS |
| Noise Density | < 2 µV/√Hz |
| Crosstalk Between Channels | < –80 dB |
| ADC Resolution (optional) | 24-bit |
| Communication Interfaces | USB / RS-485 (Modbus RTU) |
| Power Supply | 5 – 24 V DC (VOLTCON compatible) |
| Power Consumption | < 500 mW |
| Operating Temperature | 0 … +60 °C |
| Protection | ESD, overvoltage, reverse polarity |
| Housing | Shielded aluminium enclosure / PCB mount option |
| Dimensions | 120 × 90 × 30 mm |
| Weight | Approx. 250 g |
| Compatibility | AMPCON, VOLTCON, Digiboard, TW-MF2CAB, UVRRM |
Key Features and Advantages
Four Independent Amplification Channels
Each of the four channels includes an isolated transimpedance amplifier, allowing simultaneous and interference-free processing of multiple UV signals.
High Precision and Low Noise
Advanced low-noise op-amp architecture guarantees superior sensitivity for picoamp-level photocurrent measurements from UV detectors.
Selectable Gain and Filtering
Users can configure gain and filtering for each channel, optimising the response for low- or high-intensity UV measurements.
Digital and Analogue Outputs
The SGCD4 provides both analogue voltage outputs and digital data transmission through USB or RS-485, ensuring easy integration into any system.
Temperature-Compensated Design
Automatic compensation circuitry ensures stable readings across changing environmental conditions.
Seamless System Integration
Designed to interface directly with SGLUX detectors, AMPCON amplifiers, and VOLTCON power controllers, creating a complete UV measurement chain.
Compact and Industrial-Grade Construction
Its shielded aluminium enclosure offers EMI protection and durability in laboratory or field use.
Traceable Measurement Accuracy
All channels maintain calibration compatibility with NIST/PTB standards when used with SGLUX sensors.
By combining multi-channel capability, digital connectivity, and low-noise amplification, the SGCD4 offers a robust foundation for complex UV monitoring and calibration systems.
Applications Across Industries
UV Curing and Process Monitoring
Monitors multiple lamps or zones in curing lines, ensuring balanced UV intensity for coatings, inks, and adhesives.
Disinfection and Sterilisation Systems
Controls and verifies UVC emission across multiple sensor points in air, surface, or water disinfection units.
Calibration and Reference Laboratories
Enables parallel calibration of several detectors under identical UV conditions with traceable output data.
Environmental and Solar UV Research
Supports multi-detector stations for simultaneous UVA, UVB, and UVC measurements or irradiance mapping.
Industrial Automation and Safety Systems
Integrates into PLC-based or IoT-based platforms to monitor UV exposure levels for safety compliance.
Optical and Material Testing
Ideal for characterising UV transmission or ageing effects on materials using multiple reference points.
With synchronised multi-channel design and digital communication options, the SGCD4 ensures consistent, traceable UV measurement for research, industrial, and environmental applications.
Why Choose United Spectrum Instruments?
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Exclusive distributor of SGLUX SGCD4 Signal Conditioners in India
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Local integration support for multi-channel UV monitoring and calibration systems
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Calibration traceability to NIST/PTB through certified SGLUX detectors
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Competitive pricing for OEMs, laboratories, and research institutions
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Nationwide technical service, training, and after-sales support
FAQs
What is the SGCD4 used for?
It amplifies and processes signals from up to four UV sensors simultaneously.
Which photodiodes are compatible?
It supports SGLUX SiC, GaP, and Si photodiodes, as well as other low-current detectors.
Does it offer digital communication?
Yes, via USB and RS-485 (Modbus RTU) interfaces.
Can it be integrated with AMPCON and VOLTCON?
Yes, it forms a complete signal chain for UV measurement and automation systems.
How does United Spectrum support Indian customers?
By providing system integration, installation guidance, and nationwide technical assistance.
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FAQs
What is the SGCD4 used for?
It amplifies and processes signals from up to four UV sensors simultaneously.
Which photodiodes are compatible?
It supports SGLUX SiC, GaP, and Si photodiodes, as well as other low-current detectors.
Does it offer digital communication?
Yes, via USB and RS-485 (Modbus RTU) interfaces.
Can it be integrated with AMPCON and VOLTCON?
Yes, it forms a complete signal chain for UV measurement and automation systems.
How does United Spectrum support Indian customers?
By providing system integration, installation guidance, and nationwide technical assistance.
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