Features: Portable Design: The test strips are easy to carry, and the product size is about 14 x 4cm / 5.51 x 1.57 inches and weighs about 198.45g, it is easy to carry. Upgrade 14 in 1 Design: Test strips can be used to test total alkalinity, pH, hardness, lead, copper, iron, mercury, chromium/chromium (VI), bromine, nitrate, nitrite, residual chlorine, sulfite. Perfect to Use: The test strips can be used for drinking water, faucets, water well, fresh water grains and more water quality tests. Simply use professional drinking water test strips for health to test the water quality. Wide Application: The test strips are suitable for drinking water, aquarium, fish tank, swimming pool and spa, industrial water, pond, hot spring water testing. Practical Indicator Paper: High water quality indicator paper with precise color coordination and high sensitivity can be used to test water quality. Easy to use: Immerse the drinking water test in water for 2 seconds, hold it in the air for about 1 minute, and then adjust the color of the bottle to get the reading. Great to use: The box contains 100 pieces of test strips, And the water quality should be tested weekly, and the drinking water test strips are easy to operate even for beginners. Samples Requirement:1. Take 5-10mL sample and take the sample cleaning part for testing after setting for a while.2. The test is carried out at a room temperature of about 25 ° C. Test Method:1. Immerse the reaction area of the indicator paper in the solution to be tested for 1-2 seconds, then remove the indicator paper and shake out the excess water from it.2. After 1 minute, compare the reaction area color of the indicator paper with the color chart to determine the test value of the solution being tested.3. The colorimetric time should be controlled for about 60s, and the reading will be affected if the time is too long or too short. Packing List:1 Box With Test StripsNotes:1. Do not touch the reaction end of the indicator paper when removing the indicator paper to avoid contamination of the test paper and affecting the test results.2. After removing the required number of test strips, store the remaining test strips in a closed and dark place.3. The liquid to be tested should be stored as it is colorless or light-colored as possible. For dark colored liquid, activated carbon can be used to treat dehydration of the above liquid. If the liquid you are testing is relatively cloudy, simply keep it untouched for a period of time. After precipitation, take a clear part for testing.