Sku: 18845 Features: * 100% Brand new and high quality * This item can be used in: water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics * Hold function: Saves measurements for convenient reading and recording * Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteries * Dual Range: Measures form 0-999ppm, with a resolution of 1ppm. From 1,000 to 9…