I built a homebrew environmental sensor that cost R535.90, and found that there were very few benefits over buying a commercial version of the product. Some time ago, I came upon the idea that it ...

Until recently, measuring air pollution was a task that could be performed only by trained scientists using very sophisticated – and very expensive – equipment. That has changed with the rapid growth ...

Turbidity is an internationally recognized criterion for assessing drinking water quality, and a Turbidity Meter is an optoelectronic instrument that assesses turbidity by measuring the scattering of ...