Oakton® ORP testers are ideal for checking dirty water, heavy metals, sulfides, and organics. Oakton pH and ion meters measure the water quality parameters critical to many laboratory, industrial, chemical, and processing applications. Pocket-sized testers are an economical alternative for routine measurements. Valox® electrode body resists most chemicals. Whether you are performing water analysis in the lab or field, we have the pH/ORP meter to meet your needs.