About the Four Way Soil Analyzer: The meter has black plastic hosing, with probes that are 3 3/8 inches long. It has a single gauge for all four readings and comes with a complete guide with reading recommendations for most plants.
About the Home Soil Test Kit:The Home Soil Test Kit is easy-to-use and complete with pH ranges and ideal NPK levels for over 100 plants. It tests for pH, nitrogen, phosphorus and potassium and has been adapted for the home gardener. The unique Floc-Ex tablets allow the tests to begin immediately.
About the pH & Fertilizer Soil Analyzer: The meter has black plastic hosing, with probes that are 2.5 inches long. The pH part of the gauge reads 9 through 0 and the fertility part literally reads "too little", "too much", and "ideal".