Extech Instruments, a supplier of test equipment and portable printers, announces its new Waterproof ExStik® II pH/Conductivity Meter. The meters are designed for a variety of applications, including process and HVAC cooling towers, industrial and commercial boilers, RO systems, pools and spas. They also feature the world’s first combination stick electrode with a flat surface pH sensor, delivering seven selectable units of measure and automatic temperature compensation.