A thermometer measures temperature; it doesn’t diagnose illness. In a baby under 3 months, any fever of 100.4°F (38°C) or higher is urgent — call your pediatrician right away.
Match the method to the age
Accuracy depends heavily on age and method. For newborns and infants under ~3 months, a rectal digital reading is the gold standard. From about 3 months to 3 years, rectal is still most reliable, with forehead or ear as a quick check. For older children and adults, forehead, ear, or oral all work well. See how to take a baby’s temperature by age.What makes a good infrared (no-touch) thermometer?
Infrared forehead and ear thermometers read in a second or two without contact — ideal for quick screening and for checking a sleeping child without waking them. Look for fast, repeatable readings and a clear display. Our infrared thermometer guide covers technique, which matters as much as the device.What about a digital stick thermometer?
A digital (contact) thermometer measures directly in the mouth, underarm, or rectum and is often used to confirm a reading. For families with infants it’s the most accurate choice for the youngest babies. It’s slower than infrared but dependable.Should I get more than one?
For many families the ideal setup is two: an infrared forehead/ear thermometer for fast everyday screening and a digital stick for confirmation and for the youngest babies. That combination covers all ages and situations.How SonoHealth fits
SonoHealth offers the ThermoPRO forehead-and-ear infrared thermometer and the ThermoMax thermometer for home temperature checks. Whatever you choose, use the same method consistently and note which method you used, since normal ranges differ slightly by site. Browse them at SonoHealth.com.Related: Forehead vs. Ear vs. Oral · Infrared Thermometer Guide · Fever in Children Guide · How to Take an Accurate Temperature