UVC LEDs : Flexibility for design engineers
As the performance of UVC LEDs increases, adoption of this relatively new technology is gaining momentum in areas of instrumentation and disinfection. As in all emerging technologies, the designer must be aware of some fundamental differences with respect to the incumbent solution and not assume “drop-in” replacement. In instrumentation, this includes wavelength and viewing angle selection. For disinfection, understanding the relationship between residence time and UV reflectance of system materials will impact the effectiveness of the design.Read More
LEDs for Fixed Wavelength Detectors in HPLCApril 2015
Nearly 80% of all known chemicals and materials can be identified with HPLC. Current HPLC detectors typically use deuterium lamps as a light source because of the high light output in the UV wavelengths as well as excellent stability of light and relatively long life. However, the performance of Crystal IS UVC LEDs can match or exceed the performance of these lamps, enabling manufacturers to replace deuterium lamps with UVC LEDs for fixed wavelength applications.
Monitoring UVT With UVC LEDsMarch 2015
Water treatment facilities are increasing their use of UV light to provide reliable, safe drinking water to communities. Effective monitoring of the UV transmittance of water (UVT) can help prevent health risks while saving costs for the end user.
Biofoul Control Using UVC LEDsJanuary 2015
Biofouling affects a range of systems over many industries, from piping and cooling towers to power plants and other instruments exposed to water. UVC LEDs enable the long-term use of remote sensors and devices while decreasing the power consumption and footprint of traditional UV light sources.
New EPA Ozone Regulations Highlight Detector SensitivityDecember 2014
The EPA has proposed regulations to tighten it's restrictions on ozone thresholds, and many countries and corporations are looking for more effective ways to monitor criteria pollutants in the air.
Comparison of UVC LEDs and Deuterium Lamps for HPLCOctober 2014
Many applications, from analysis of complex biological samples to pharmaceutical processing, rely on HPLC instrumentation. UVC LEDs provide many benefits for this application, from light stability and extended lifetimes to system cost advantages.
Benefits of UVC LEDs for DNA Purity Measurements
DNA purity measurements allow scientists to detect genetic disorders, produce DNA fingerprints of individuals, and even create genetically engineered organisms to produce beneficial products such an insulin. The instant on/off, high light output stability and less costly design of LEDs make them ideal for these measurements.
Thermal Management of UVC LEDsJuly 2014
Thermal management of UV sources can be a challenge in many applications, from water disinfection to surface curing. Unlike other UV sources, UVC LEDs give off heat primarily out the back of the device as opposed to infrared radiation out the front of the device.
Improvements in UVC LED Reliability Increases Adoption
In instrumentation applications such as water and air quality monitoring and HPLC, UVC LEDs provide many benefits over traditional UV light sources. Development of Aluminum Nitride substrates as well as the implementation of thorough qualification tests have dramatically increased the reliability and lifetime of UVC LEDs, making these products an effective solution for many instrumentation applications.
UVC LEDs Offer Benefits for Real-Time Applications
In water and air quality monitoring, the collection of ongoing, real-time data on contaminant levels decreases the response time to potential quality issues. High performance UVC LEDs are effective for remote, unmanned monitoring, and enable trace detection of pollutants at the parts-per-billion (ppb) level to comply with government air and water regulations—helping to safeguard communities around the world.
Spectral Quality and Implications in Instrumentation and Disinfection
Spectral quality has different implications depending on the context of the end use application being considered. In spectroscopy, a narrow peak with no secondary peaks is preferred, while in disinfection, the entire energy under the UVC peak can be used to deactivate microorganisms.
Lowered Lifecycle Costs for UVC LEDs
Innovative products are often driven by the need to decrease both system and operating costs. High performance UVC LEDs can decrease system costs by as much as 50% in instrumentation and offer significant cost of ownership benefits for disinfection.
Opening Design Possibilities
Several UV light sources are often difficult to incorporate into applications due to their size. The implementation of UVC LEDs provides the opportunity for design flexibility due to their compact size.
Increasing the Lifetimes of UVC LEDs
LEDs have significantly longer lifetimes than conventional light sources. Conventional light sources require frequent replacement, where LEDs often provide many years of use. There are several factors which affect the lifetime of LEDs.
Brighter UVC LEDs for Broader Adoption Across Applications
Germicidal and instrumentation applications both benefit from high intensity brightness. The high light ouput of UVC LEDs allow for effective disinfection and accurate measurments.
LEDs Offer Benefits from Reduced Heat Radiation
LEDs are much better suited for heat sensitive applications than conventional lamps. LEDs extract the majority of generated heat from the back side of the LED maintaining the integrity of samples and allowing for the most accurate end result.
Stability of Light Output for Measurement Accuracy and Reliability
October 2013Compared to traditional UV lamps, LEDs offer instantaneous, more stable light output. This is a key factor in producing accurate and reliable measurments.
Simplicity of LED Drive Electronics Enables Ease of Operation
Instant On/Off Capabilities Enhance and Enable Applications Across Multiple Industries
In less than a microsecond, LEDs reach their full brightness. Their ability to be switched on and off instantly results in extended lifetime and conservation of energy during operation.
Single Peak Attributes of LEDs Enable More Accurate Measurements
For a single spectroscopic application, only light at a particular wavelength is useful. Broad spectrum UV lamps generate light across multiple wavelengths and the remaining, unwanted spectra are filtered out to avoid interference. UVC LEDs have a single peak with narrow spectral bandwidth and do not produce any excessive spectra.