Safety 1st Gentle Read Rectal Thermometer

Best Rectal Thermometer for Babies

Why people love it
  • Reads quickly
  • Easy to use
  • Accurate

The included battery isn’t great – and you’ll need to check this thermometer to make sure it works before you need it in an emergency.


This is a basic rectal thermometer (which is the recommended format for infants) and easily the best budget option on the market. There aren’t many bells and whistles, but it does the job well. Wait, we want to clarify that. As long as the battery is fresh, it works amazingly. But, with an old or failing battery, this baby thermometer is difficult to work with. If you’re a new parent or parent-to-be, we suggest getting this early and checking the battery as soon as possible.

Type of thermometer: Rectal

Age recommendation: It’s best for infants between 0 and 3 months of age.

Power source: A watch battery. Some users have reported issues with the included battery. However, you can replace it. That said, you’ll (hopefully) use this thermometer rarely.

Reading time: The manufacturer reports an accurate temperature within 8 seconds. Some users have gotten readings within 3 seconds. But, some also report it taking a little longer.

Cleaning instructions: You’ll need to give this a good clean after every use. It is, after all, a rectal thermometer. Once you’ve cleaned and dried it, you can replace the tip cover so it’s ready to use the next time.

Getting an accurate reading: As much as rectal thermometers creep some people out, they are the most accurate for taking the temperature of children between birth and three months of age. Indeed, they’re likely to be the best for children up to three, according to the American Academy of Pediatrics. So, even though this is a basic model, it’s much more accurate than forehead, ear, or oral thermometers.

Smart features: No. But, you didn’t expect any, did you?

Other features: In addition to the over-insertion guard, this rectal thermometer also recalls the last reading. You know, just in case you forgot to write it down for the doc.

Will it break the bank? At less than $6, you really can’t go wrong. You may need to replace the battery, but that shouldn’t break you either.

Featured in

Faveable Giveaway

$100 Amazon Gift Card

Amazon Gift Card

Join the conversation: Safety 1st Gentle Read Rectal Thermometer

Never make a dumb purchase again

Our tips in your mailbox: