Check the listing for details. Hanna Water Testers - Alkalinity Copper Nitrate. Condition: Used. Listed at 135.00 USD. Introducing the Hanna Water Testers, designed to accurately measure the alkalinity and copper nitrate levels in your water. These digital testers offer quick and reliable results, displayed on an easy-to-read screen for your convenience. The portable design ensures that you can take these testers with you wherever you go, making them an ideal choice for both home and professional use.Crafted by Hanna, a trusted brand in water testing solutions, these testers are an essential tool for anyone concerned about the quality of their water. Whether you're monitoring your drinking water or checking the pH levels of your hydroponic system, these versatile testers are designed to provide you with the information you need to ensure your water is safe and healthy.