The OHAUS Starter Water Analysis Pen Meters are a line of pen meters that are durable, practical, and affordable. Starter Pen Meters are the portable solution for on-the-go measurement of pH, ORP, conductivity, salinity, and TDS. Each model is constructed with durable plastic housing, a protective cap that safeguards the sensor, and an automatic shutdown feature to preserve battery life. They are equipped with a wrist strap that helps prevent accidental dropping, although they are constructed with...