pen type water quality testing water TDS meter CT-3061 is a precision instrument for PPM value of the test solution. PPM value and temperature. Its stable performance, full-featured, easy to operate and so on. Making it the field and laboratory testing and control of enterprises and institutions the best choice of the PPM value. Widely used in the monitoring of the chemical, pharmaceutical, electronics, food, and other industries. Nicety electronics to the latest technology, the lowest prices, quality service to meet customers from all walks of life.