General Tools PT2020G-220 Analog Soil and Composting Dial Thermometer, Long Stem 20 Inch Probe, 0 to 220 degrees Fahrenheit (-18 to 104 degrees Celsius) Range PROBE- 20-inch (508mm) long shaft TEMPERATURE RANGE- Measures 0 to 220F (-18 to 104C) EASY TO READ: 2-inch (51mm) wide dial with a clear glass lens RUGGED DESIGN- Rustproof and long-lasting stainless steel probe VERSATILE- Ideal for taking ground and soil temperature for composting, gardening and other agricultural applications