Compost Thermometer – Cate’s Garden Premium Stainless Steel Bimetal Thermometer for Backyard Composting – 2 Inch Diameter Fahrenheit Dial, 20 Inch Temperature Probe Price: $42.00 $20.95 (as of 05/01/2018 15:12 PST- Details)

CLEAR ACCURATE DIAL ? Easy to read 2 inch wide dial with color-coded temperature ranges. 40 – 180 Fahrenheit range, in 2 degree increments for accurate readings.
HIGH QUALITY LENS ? High-quality and lightweight PC-coated lens, hermetically sealed to avoid fogging and moisture. IP55 water-resistant rating.
RUGGED CONSTRUCTION ? Tough, reinforced welded bolt between dial and stem for long-lasting operation and conditions. High quality 304 grade rust-resistant stainless steel.