Monitoring conductivity, total dissolved solids and salinity levels in streams, rivers, or other bodies of water, the Model EC2-10, WSM-10, and TDS2-10 water testing pens have a large LCD display. These pocket sized testers are constructed of a durable ABS plastic waterproof housing and can float if dropped. Since change in temperature can affect accuracy, the testing pens have automatic temperature compensation. Four alkaline batteries, LR44, are included in packaging.
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