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Beurer BY11 Instant Thermometer review

If you're looking for a thermometer to deliver fast, accurate temperature readings at a reasonable price, then the Beurer BY11 Instant Thermometer could be for you. But how does it fare against other digital thermometers? Parent-tester Laura shares her honest review. 

By Laura Westerman | Last updated Dec 11, 2025

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Mumsnet Badge Beurer BY11 Instant Thermometer
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Price: RRP £7

Price: RRP £7

What we like
  • Can be used in three ways

  • Flexible tip for comfort

  • Available in three fun animal designs

  • Comes with a protective storage cap

  • Ideal for travel - small and lightweight

  • Recalls last reading

What we don't like
  • LCD screen doesn’t light up - hard to see temperature at night

  • Instructions difficult to read

  • Can take longer than 10 seconds for a reading

  • No age settings or special features

Key specs

Type: Digital stick thermometer | Age settings: None | Memory function: Yes - recalls last reading | Celsius and Fahrenheit: Yes | Batteries: 1.5V LR41 battery (included)

Our verdict

If you’re looking for a straightforward, slimline baby thermometer, then the Beurer BY11 Instant Thermometer could be just what you’re looking for. I tested it for a week and like that it’s free of glass and mercury with a flexible design for safety. It provides a quick and straightforward temperature reading in about three seconds when taken orally (or 20 seconds for armpit readings), followed by a beep and automatic shutdown after 10 minutes. 

I used the cute frog design, which my daughter loved – and there are also monkey or dog options to make the temperature-taking experience less daunting. This thermometer is also compact and light enough to carry in your handbag or changing bag for any occasion.

However, unlike theBraun Age Precision Digital Stick Thermometer or theBraun Sensian 7 BNT400 Non-Contact Forehead Thermometer, this model lacks age settings and colour-coded lights for interpreting readings. However, it still gives accurate readings and is good value for money overall.

What we tested
Performance
4
Quality
4
Ease of use
4
Value for money
5
Safety
4
Accuracy
4
Comfort
4
Hygiene and cleaning
4
Beurer BY11 Instant Thermometer

How we tested the Beurer BY11 Instant Thermometer 

I tested the Beurer BY11 Instant Thermometer (frog design) with my 22-month-old toddler, comparing it against stick, in-ear and forehead thermometers like the Braun ThermoScan 7 with Age Precision, Braun Sensian 7 Non-Contact Forehead Thermometer, the Kinetik Inner Ear Thermometer and the Braun Age Precision Digital Stick Thermometer.

During testing, I scored the Beurer BY11 Instant Thermometer on eight different criteria: performance, quality and durability, ease of use, value for money, safety, accuracy, comfort, and hygiene and cleaning.

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Is the Beurer BY11 Instant Thermometer easy to set up?

Yes. While I found the instructions difficult to read as the print is so small, set-up was generally very intuitive and quick. You switch the baby thermometer on using the button and it carries out a self test for two seconds. The symbol ‘Lo C’ then appears on the display after which you’re free to take a reading.

Beurer BY11 Instant Thermometer reading

Does the Beurer BY11 Instant Thermometer provide accurate and consistent temperature readings?

The Beurer BY11 Instant Thermometer provides you with three different ways to take your baby’s temperature: orally, under the armpit or rectally. 

While I didn’t use the thermometer rectally, I found the oral temperature reading to be the most accurate. When used orally, I was able to take my toddler’s temperature in just three seconds and the temperature reading was exactly the same as the Braun ThermoScan 7 with Age Precision, which I find to be very reliable.

In contrast, it took me 20 seconds to take an under-arm temperature reading and the reading was 0.7 degrees out when compared to the Braun ThermoScan 7. Not particularly ‘instant’ like the Beurer thermometer’s name would suggest.

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How easy is the Beurer BY11 Instant Thermometer to use?

You simply press one button to turn the Beurer BY11 Instant Thermometer on and off, and it also switches itself off after 10 minutes to preserve the battery (this could happen earlier though, in my opinion).

It beeps to inform you that a temperature reading has been taken, with five alarm sounds when the reading climbs above 37.8 degrees, signalling an elevated temperature. This makes it simpler for parents to decipher a reading, however unfortunately the screen doesn’t light up, which makes it hard to read your baby’s temperature in the dark, at night. 

A ‘Hi’ symbol shows when the reading is over 42.9 degrees, but this seems too high to me - the symbol should appear if your child’s temperature is over 39 or 40 degrees instead as this is usually when you need to see a GP, or if you have a very young baby with a fever (38 degrees if you have a newborn).

As such, I much prefer the Age Precision technology of Braun thermometers, with colour-coded temperature readings to suit your baby’s age, thus taking out the guesswork for parents.

Toddler having temperature taken with the Beurer BY11 thermometer

Is the Beurer BY11 Instant Thermometer comfortable for babies?

While I didn’t test the thermometer out rectally, my toddler found both oral and under-arm readings were comfortable due to the Beurer BY11’s gentle and flexible tip. 

There are three fun and cheerful designs to choose from with the Beurer - a frog, dog and monkey - which makes it a lot less daunting for your child when taking their temperature.

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Beurer BY11 Instant Thermometer: how easy is it to store and clean?

While simpler in design, the Beurer BY11 Instant Thermometer is both smaller and more lightweight than in-ear thermometers like the Braun ThermoScan 7 and the Kinetik Inner Ear Thermometer, and forehead thermometers like the Braun Sensian 7, making it much easier to store in a changing bag or take in your cabin bag on holiday. The protective cap that stays on well ensures it stays hygienic when not in use.

The thermometer is waterproof and can be rinsed in water before disinfected with an alcohol wipe and then rinsed again before drying with a cloth or paper towel.

Is the Beurer BY11 Instant Thermometer good value for money?

Yes. At just £7, the Beurer BY11 Instant Thermometer is an extremely affordable option. While it lacks the Age Precision technology of Braun thermometers and doesn’t have an LCD screen, the Beurer By11 is a good choice if you’re after a no-frills option and prefer to take your baby’s temperature orally.

About the author

Laura Westerman is an editor, writer and Deputy Head of Editorial Content at Mumsnet. Mum to a one-year-old, she is fully invested in discovering the best and most affordable baby products on the market, and sharing her knowledge and findings with other parents.

With over seven years' experience as a full-time editor, five of which have been spent writing, commissioning and editing pushchair product reviews and round-ups, Laura has a keen eye for what parents love and likes nothing more than putting together honest reviews to make parents' lives that little bit easier. 

In addition to her work as a writer and editor, she has also appeared in a number of baby product videos for Mumsnet's YouTube channel.