Access Sensor Technologies, a small business, has created low-cost environmental sensors.

Access Sensor Technologies is developing low-cost environmental and pollution sensing and sampling technologies, potentially giving more people the ability to test water, air and food. The NSF-funded tool, called a Chemometer, measures the concentration of chemicals in a water sample, testing for ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video