Horizontally mount this minimum-registering thermometer in your orchard or nursery to keep up to date on critical nightly low temperatures. Nonhazardous red liquid displays the current temperature while the black marker shows the lowest temperature since the thermometer was last reset. Tilt thermometer to reset. Range is from 10° to 100°F in easy-to-read increments. 1-3/4"W x 12-1/4"H. Includes instructions.