Features three-point push button calibration High accuracy ATC Self-diagnostic messaging Non-volatile memory Double-junction polymer sensor Waterproof pHTestr 30 is great for outdoor applications such as taking pH measurements in lakes and streams. Designed to float in…

Built-in temperature sensor lets you take ATC readings with a single probe Includes a FREE electrode saver bottle to extend electrode life Feature a BNC connector for pH and a waterproof 6-pin connector for temperature All-in-One Waterproof electrodes feature a built-in…