pH meters measure acidity/alkalinity. These units are accurate enough for testing the pH of fountain solution of printing presses, yet inexpensive enough to use at work or home for testing soil, water, food service compliance with HACCP regulations, tropical fish aquariums, aqua culture, hydroponic gardening and farming, winery/brewery process control, and swimming pools. They are even used by sushi restaurants to make sure the rice meets health department guidelines!HINTS: To test the pH of soil in gardens and lawns, mix two parts of distilled or de-ionized water per part of soil, let the solids settle to the bottom, and measure the pH of the solution at the top. To test rice, add enough distilled or de-ionized water to make the rice moist enough to measure. When checking cooked food, allow it to cool to room temperature, so the pH bulb will last longer. In such instances, a temperature compensating meter, such as the HI98127 or HI98128 will give more accurate readings.Conductivity meters measure either electrical conductivity (EC) as expressed in "micro-siemens" or total dissolved solids (TDS) expressed in parts per million (ppm), so you can determine solution strength without regard to "buffers" and other chemical agents added to maintain pH. Conductivity is important for water conditioning and treatment, environmental, and electro-plating applications. In hydroponic gardens and farming, greenhouses and aqua culture, measurement assures the proper level of fertilizer is being dosed. All units are rugged, pocket-size, battery operated (batteries are included), and have LCD displays. They measure directly with no need to remove messy samples.
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