Detects: <0.02, 0.05, 0.1, 0.2, 0.4, 1.0, >1.6 ppm (mg/L) Packet of 12 TestsThis Manganese colour test strip, from our SenSafe® brand allows for quick and accurate testing of manganese in water. This is a simple dip and read test and you will have your result within a few minutes. Our patented aperture strips are unique in the way the water flows through them and detects the manganese more accurately. The precise colour chart is found on the back of the bottle and no other reagents or accessories are needed for this simple test. We use trace amounts of chemicals on our strips which makes them extremely safe and non-hazardous. They are considered as Articles under OSHA and do not require SDS sheets. This packaging is recyclable. Notes: The new and improved SenSafe® Manganese eliminates interferences from several ions like copper, iron, cobalt, lead, nickel, etc. Manganese is a mineral that naturally occurs in rocks and soil. It becomes noticeable in water at >0.05 ppm with a color, odor, or taste. In well water, Manganese is often found in a dissolved state. When first drawn the water will appear clear but upon exposure to air or after the addition of oxidants such as chlorine bleach or ozone the water looks brown or black.