New wearable UV detector aims to prevent sunburn

Published: 16 October 2025. The English Chronicle Desk. The English Chronicle Online.

Scientists have developed an innovative wearable ultraviolet (UV) detection system designed to monitor sun exposure and help prevent sunburn, a major contributor to skin cancer in the United Kingdom. According to Cancer Research UK, nearly nine in ten skin cancer cases are linked to overexposure to UV radiation from sunlight or sunbeds, highlighting the urgent need for effective monitoring and prevention tools.

UV radiation comes in three forms: UVA, UVB, and UVC. Among these, UVA poses the greatest risk because its long wavelength allows it to penetrate the ozone layer and reach deep layers of the skin, accelerating ageing and increasing the likelihood of skin cancer. While sunscreen provides essential protection against UVA, the newly developed wearable sensor offers a complementary approach by continuously tracking exposure levels in real time.

The transparent device can be seamlessly integrated into wearable accessories such as smartwatches, glasses, or adhesive patches. This design represents a significant improvement over traditional opaque sensors, which can obstruct light detection or interfere with aesthetics. Study author Yu Bin Kim, of Soongsil University in Seoul, South Korea, explained that the sensor’s transparency “enables seamless integration with surroundings and users, particularly in wearable devices where transparent UV detection is required.”

Researchers tested the sensor for light transmittance, the proportion of UV light that successfully reaches its internal semiconductor. The device achieved an average transmittance of 75 per cent, demonstrating its efficiency in capturing UV radiation while remaining fully transparent. Once connected to a smartphone, the system monitors real-time UV exposure and sends alerts when a user reaches 80 per cent of their pre-set threshold, helping prevent sunburn before it occurs.

Prolonged exposure to UVA radiation not only accelerates skin ageing but also significantly increases cancer risk. Experts emphasise that continuous monitoring is essential, as cumulative exposure over time can have serious health consequences. Despite the device’s capabilities, researchers and dermatologists stress that it should be used alongside conventional sun protection measures, including sunscreen application, wearing protective clothing, and seeking shade during peak sunlight hours.

The potential impact of such a device is considerable, especially given that even infrequent sunburns can elevate cancer risk. Cancer Research UK warns that getting sunburnt just once every two years can triple the likelihood of developing skin cancer compared with never being burnt, underscoring the importance of preventive measures.

The study, published in the journal Science Advances, illustrates the practical applications of integrating wearable technology with smartphone connectivity to safeguard public health. By offering real-time feedback, this new UV detection system represents a proactive step in reducing the incidence of skin cancer and protecting skin health across all age groups.

Beyond its immediate applications, the sensor could pave the way for broader use in health monitoring, combining convenience, style, and protection. Researchers believe that integrating such transparent sensors into everyday accessories may encourage wider adoption and more consistent sun safety practices, potentially reducing long-term health risks associated with UV exposure.

As summer approaches and outdoor activities increase, tools like this could become invaluable in preventing sunburn and mitigating the risks of skin cancer. By complementing existing precautions, such devices provide users with actionable information, empowering them to make safer choices while enjoying time outdoors.