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This is an easy-to-operate meter, perfect for testing nutrient solutions in hydroponics growing systems, etc. Simply put a sample in the meter's reservoir, press the test button and turn the metered dial until indicator light comes on.
Reads in µho/cm (µS/cm). 4-oz (118 ml) calibration solution included. Meter is 6" x 3". Ship weight 2 lbs. 18-month warranty.