Upgrade 14 in 1: Test total alkalinity, pH, hardness, lead, copper, iron, mercury, chromium/chromium (VI), bromine, nitrate, nitrite, residual chlorine, fluoride, sulfite Health: Test strips are used for drinking water, faucets, well water, fresh water tanks and quality tests. Use professional drinking water test strips for health to test water quality standards. Easy to use: Dip the drinking water test paper into the water for 5 seconds, keep it in the air for about , and then adjust the color of the back of the bottle to get the reading. Even for beginners, drinking water test strips are easy to use. The water quality of drinking water can be found in test paper in just 35 seconds. Drinking water is indispensable in our lives! Polluted water sources can cause many health problems, so it is important to regularly test the quality of drinking water. how to use: 1. Immerse the test paper in water for 5 seconds. 2. Remove and wait for . 3. Compare the drinking water test strip with the color chart on the bottle TIP: 1. Keep away from light and humidity. 2. After removing the belt, please quickly reinstall the cover. 3. Don't inappropriate behavior. 4. Do not touch the test area of the reagent strip. Specifications: Total Alkalinity (0 - 400 PPM) pH (6.0- 9.0) Total Hardness (0 - 1, 000 PPM) Iron (0 - 5 PPM) Low Level Detection Copper (0 - 2 PPM) Low Level Detection Lead (0 - 50 PPB) Low Level Detection Fluoride (0 - 5 PPM) Low Level Detection Mercury (0 - .08 PPM) Low Level Detection Nitrite (0 - 80 PPM) Nitrate (0 - 500 PPM) Chromium (0 - 100 PPM) Residual Chlorine (0 - 20 PPM) Bromine (0 - 20 PPM) Sulfate (0 - 1, 600 PPM) Tips: The product may be updated constantly , Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Material: Paper colour: As Shown Package Contents: 100 x drinking water test strips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.