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Electronic Substrate Thermometer These are by far the best we've seen for the money. A lightweight, fast response electronic thermometer 51/2 inches long. Accurate to within 1° F (-58266 °F, 2 °F at 267338 °F) with a -58338° F range, this pocket sized unit is well suited for on-the-spot measuring of substrate/soil temperatures. Battery included.
ESTMES $64.95 
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