- Digital ear thermometers function by measuring infrared energy that emits from the tympanic membrane within the ear. The thermometer sensor is located in a small tube that is inserted into the ear opening. When the thermometer is activated, it opens a shutter to collect infrared energy for a brief period. When enough has been collected, the shutter is lowered, temperature is calculated and an alarm sounds to notify the user that the process is complete.
- Basal body temperature measurements are taken on a daily basis to predict and confirm ovulation and sometimes diagnose thyroid problems. This measurement must be taken at the same time each day and must be taken before any activity, even getting out of bed. Movement of any kind can raise the body temperature, which affects the accuracy of the reading.
- Basal body thermometers are created specifically for the purpose of measuring basal body temperature. These thermometers are much more sensitive than other thermometers. Typical digital thermometers only register to the tenth of a degree, while basal body temperature thermometers register changes to the hundredth of a degree. The sensitivity level is important, when even minute changes in the basal body temperature can signal trends or provide needed information.
- Digital ear thermometers are intended for use in checking for fever. They are not designed for use as basal body temperature thermometers. While it is possible to use any medical thermometer, the results will not be as accurate.
- When collecting basal body temperature information, keep a pen and paper beside the bed. When you wake up, write down your temperature before you get out of bed. This will improve the accuracy of your readings, regardless of the style of thermometer you use.
