A Digital Thermometer is an electronic device for measuring body temperature, having largely replaced glass mercury thermometers due to its safety, speed, and ease of use. It uses a thermistor sensor to provide a rapid, accurate digital readout on an LCD screen via oral, rectal, axillary, or other specialized routes. Key features often include a fever alarm, memory recall, and waterproof design for easy cleaning. Its accuracy, hygienic benefits (especially with disposable probe covers), and suitability for all age groups make it an indispensable tool in hospitals, clinics, and homes for detecting fever, monitoring illness, and assessing overall patient health.