Optical Sensors & Detector – Custom UV Radiometers
Knife UV Radiometer
Compact Knife-Style UV Radiometer for Accurate Real-Time Measurement of UV Intensity in Industrial Applications
The Knife UV Radiometer is a precision instrument developed for accurate measurement of ultraviolet (UV) irradiance in narrow or hard-to-access environments, such as UV curing systems, sterilisation chambers, and conveyor-based processes. Its ultra-thin “knife-shaped” profile allows direct insertion into confined spaces between lamps, reflectors, or substrates without disrupting the process. The radiometer measures UV-A, UV-B, and UV-C radiation with high sensitivity and stability, using a rugged Silicon Carbide (SiC) or Gallium Phosphide (GaP) detector depending on configuration. Designed for industrial reliability, the Knife UV Radiometer features rapid response, excellent temperature resistance, and traceable calibration to NIST/PTB standards. The integrated digital or analogue output enables seamless data recording and process control. Combining precision, durability, and compact geometry, this device ensures accurate, repeatable UV measurement even under dynamic manufacturing conditions where traditional sensors cannot fit.
Understanding Knife UV Radiometer
The Knife UV Radiometer is engineered to measure UV irradiance directly inside curing lines, sterilisation tunnels, and closed chambers. Its flat, blade-like geometry enables insertion between process components where space is limited, providing accurate UV readings in real operating environments. The radiometer’s spectral sensitivity can be tailored to UV-A (315–400 nm), UV-B (280–315 nm), or UV-C (200–280 nm) depending on application needs. It uses a stable, temperature-compensated SiC or GaP detector for long-term accuracy and minimal drift. Fast response electronics allow real-time monitoring and feedback control, ensuring consistent UV exposure in industrial curing, medical sterilisation, and materials testing.
Technical Specifications
| Feature | Specification |
| Spectral Range |
UVA (315–400 nm) / UVB (280–315 nm) / UVC (200–280 nm)
|
| Detector Type |
SiC or GaP Photodiode (depending on model)
|
| Measurement Range |
0.1 µW/cm² – 20 W/cm²
|
| Measurement Units |
Irradiance (mW/cm²) / Dose (mJ/cm²)
|
| Response Time | < 100 ms |
| Active Area |
1 – 10 mm² (customisable)
|
| Sensor Thickness (typical) | < 4 mm |
| Calibration |
Traceable to NIST / PTB standards
|
| Accuracy |
±3% of reading (typical)
|
| Analogue Output | 0–10 V / 4–20 mA |
| Digital Interface |
USB / RS-232 / RS-485
|
| Operating Temperature | 0 … +80 °C |
| Storage Temperature | −20 … +85 °C |
| Power Supply |
5 V DC / USB powered
|
Key Features and Advantages
Ultra-Slim Knife Design
The radiometer’s unique thin form factor allows placement in restricted spaces—such as between conveyor belts, UV lamps, and substrates—without interrupting production.
High Sensitivity and Stability
Equipped with a SiC or GaP UV detector, the device ensures excellent responsivity, stable operation, and long-term measurement accuracy.
Broad UV Band Compatibility
Available in UV-A, UV-B, or UV-C versions, it supports both LED and mercury lamp systems, ensuring flexibility for various industrial setups.
Fast Response Time
Its fast electronics deliver instant readings for dynamic UV systems, enabling process control and performance verification in real time.
Traceable Calibration
Each Knife UV Radiometer is factory-calibrated against NIST or PTB standards, ensuring globally recognised accuracy and repeatability.
Rugged Industrial Build
The sensor is built for continuous operation in high-temperature, high-irradiance environments such as curing ovens, coating lines, and medical sterilisation systems.
Data Connectivity and Integration
Analogue and digital outputs enable integration with PLCs, data loggers, or process control systems, providing flexibility for automation.
By combining precision calibration, fast response, and slim geometry, the Knife UV Radiometer is the ideal choice for industrial UV monitoring where space is limited and accuracy is critical.
Applications Across Industries
UV Curing Systems
The Knife UV Radiometer is designed for inline monitoring in UV curing lines for inks, coatings, and adhesives, ensuring optimal UV intensity and curing quality.
Surface Sterilisation and Disinfection
In medical and pharmaceutical equipment, it verifies UV exposure levels for sterilisation of instruments, packaging, and production chambers.
Semiconductor and Electronics Manufacturing
Used for verifying UV exposure uniformity in photoresist curing, plasma cleaning, and PCB fabrication environments.
Printing and Packaging
Ensures consistent UV curing performance across print heads and conveyor sections, improving product finish and reliability.
Automotive and Aerospace Coatings
Provides accurate UV intensity measurement in curing booths and material durability testing setups.
Research and Calibration Laboratories
Ideal for controlled experiments, UV LED characterisation, and reference calibration of UV sources.
With its compact, high-accuracy design and robust construction, the Knife UV Radiometer is a versatile solution for industrial, scientific, and medical UV measurement.
Why Choose United Spectrum Instruments?
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Exclusive distributor of advanced UV radiometry systems in India
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Local inventory ensures quick delivery and reduced lead times
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Competitive pricing for industrial, research, and medical markets
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Expert consultation for custom UV monitoring system integration
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Nationwide after-sales service, calibration support, and technical training
FAQs
Why is it called a “Knife” UV Radiometer?
Its slim, blade-like design allows measurement in narrow or enclosed spaces.
What UV ranges can it measure?
Models are available for UVA, UVB, and UVC detection.
Is it suitable for UV LED systems?
Yes, it is compatible with both LED and mercury lamp UV sources.
Can it be used inline during production?
Yes, it’s designed for real-time process monitoring in active systems.
How does United Spectrum support Indian customers?
By providing local stock, expert guidance, fast delivery, and nationwide after-sales service.
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FAQs
Why is it called a “Knife” UV Radiometer?
Its slim, blade-like design allows measurement in narrow or enclosed spaces.
What UV ranges can it measure?
Models are available for UVA, UVB, and UVC detection.
Is it suitable for UV LED systems?
Yes, it is compatible with both LED and mercury lamp UV sources.
Can it be used inline during production?
Yes, it’s designed for real-time process monitoring in active systems.
How does United Spectrum support Indian customers?
By providing local stock, expert guidance, fast delivery, and nationwide after-sales service.
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