The Check Up Digital Incubator Thermometer is specifically designed for use in incubators to give a continuous readout at an exceptional level of accuracy - in the order of 20 times the accuracy of most general purpose digital thermometers. The Check Up operates over a narrow temperature band, 32 to 42 degrees C or 90 to 109 degrees F. Below and above this range are not indicated. The probe is hermetically sealed and will not be damaged by cool water. The probe has a 18" wire lead and fits a 1/8" to 5/32" hole. A range switch allows for reading in either Celsius or Fahrenheit. Battery life is continuous and is typically good for six weeks. An off switch is provided to save battery life when the Check Up Digital Incubator Thermometer is not in use. This digital thermometer can be used for both Forced Draft Incubators and Still Air Incubators. Recommended for use with Hova-Bator Incubators. Includes battery.