Wearable patch detects poisons, alerts wearer with haptic vibrations
Researchers have developed a wearable patch that detects hazardous substances and uses distinct vibrations to warn the wearer. The device can identify six contaminants and may someday save lives in dangerous occupations.
The patch is designed to sense environmental contaminants and alert users instantly. Each type of poison has its own vibration pattern, allowing the wearer to know exactly what has been detected without needing to check a phone or undergo additional tests. This direct feedback is especially useful for people in professions that regularly involve contact with hazardous materials.
According to the researchers, the current version can identify six contaminants: heavy metals, particulate matter, high or low temperatures, humidity, volatile organic compounds, and nitrogen oxide gases. The patch is rechargeable and uses a solar-powered battery. A key feature of the device is its modularity. Corresponding author Amay Bandodkar said sensors can be added or removed to monitor the hazards most relevant to a given application, making the patch 'extremely flexible.'
A separate version of the patch has been created for robots. It uses an 'e-skin' made from piezoelectric material that can be attached to a robot. When toxins are detected, it sends an electrical signal to warn the robot of the danger. This could enable robots to operate safely in environments that are too dangerous for human workers.
TechRadar noted that many existing wearable toxin sensors send warnings to a smartphone, which can be impractical when the wearer is using protective gear or does not have the phone at hand. The vibration-based patch delivers warnings directly on the skin, making it an interesting example of wearable technology moving beyond simple health analysis into potentially life-saving safety applications.