Nano sensors are highly sensitive to food spoilage and can indicate small changes in food color or gases produced when the food is spoiled. For example, gold-based nanoparticles are used for the detection of aflatoxin B1 that is often found in milk. In agriculture, Nano sensors are used to indicate pesticides present on the surface of vegetables and fruits. Some Nano sensors can also identify carcinogens in food materials. In the field of food microbiology, Nano sensors are effectively used to alert consumers and distributors on the safety status of food, as it can precisely indicate the presence of any pathogens in food material and with this, STL is look up to be one of the largest Nano- sensor & Bio-sensor producing company in Kenya, Africa and eventually across the world.