Environmental Test Kit for Air/Water

Includes nine different tests to determine the air and water quality of samples taken at your place of residence. Examine your water quality by testing the dissolved oxygen levels, water hardness, pH value, phosphate and chloride levels. then test for fine dust and chemical impurities in the air, measure smoke density and learn how too much carbon dioxide in the air can affect your surroundings. Also included is teacher's manual and study guide for the students. There are enough materials for a 30-member class when working in groups.