John Deere Advanced Hay, Straw and Silage Tester This newly advanced Hay, Straw and Silage Tester is the most efficient probe on the market. The 20-inch stainless steel probe and tip provides accuracy, versatility, and durability. This tester will measure push force to determine ehether it’s a high- or low-density bale, then adjusts the moisture results for more precise accuracy Features Measures 8-72% moisture content Temperature range 32-185 degree F (0-85 degree C) Automatic Density Compensation Choice of hay or straw bales, separate mode for silage Memory can store results up to 64 bales with a total of 1,000 savable moisture and temperature readings Continuous reading as you probe bale