The OMEGA CDH-7021 Waterproof Pen Tester is a robust and reliable instrument for measuring pH, conductivity, and temperature in various applications. Its waterproof housing (IP67 rated) and microprocessor-based design ensure accurate and fast readings. The tester features a large LCD display for simultaneous readings, automatic temperature compensation, and simple calibration via a single keyboard. It's ideal for field use and applications requiring precise measurements in challenging environments. The easy-to-replace electrode module recognizes the electrode type automatically, displaying the information on the screen.