Drinking water should have a pH level of around 7.5, but 'normal' is generally considered somewhere between 6.5 and 9.5. Now, onto the food. Using a sensor specifically for fruit and vegetables ...

Much of the water on Earth’s surface ... no less than five different sensors. These can determine the oxidation-reduction potential (a chemical indicator), the pH (acidity), total dissolved ...

Milerd EcoTracker is a pocket-sized device that helps you keep healthy by checking food and water contamination using probes.

Researchers have developed a new optical sensor that provides a simple way to achieve real-time detection of extremely low levels of arsenic in water.

An Indian researcher in the US has developed a small and low-cost acidity sensor that can tell in real time when food has spoiled. The flexible pH sensor is just two millimetres in length and 10 ...