FlexiPen™ Digital Thermometer


Thank you for purchasing the Tommee Tippee FlexiPen™ digital thermometer. This product support page is here to help you learn how to use, clean and care for it, and to help with any queries you may have.

  • What’s in the box?

    1x FlexiPen™ digital thermometer

    1x protective case

  • How to use

    • Please make sure the environment temperature is between 16°C - 31°C before use.
    • Press power switch to turn the unit on.
    • It will beep when you turn it on to indicate sufficient power and you will see this full segment screen for a few seconds:

    Last memory icon

    • After the full segment screen, you will see the last measured value with “Last Memory” on the display.
    • After a few more seconds the screen will display Lo°C or Lo°F. Then the °C or °F symbol will flash. Please wait for the symbol to flash 3 times before taking a measurement.
    • The thermometer will beep when its finished taking a reading:

    Thermometer temperature table Green normal reading and red fever alarm

    • During measurement LCD will display Lo°C or Lo°F if the measured temperature is below 32°C / 90°F or will display Hi°C or Hi°F if the measured temperature is above 43.9°C / 111°F
    • Turn off the unit by lightly pressing the power switch or leave it for a few minutes and it will auto-off to save power.
    • To maintain the accuracy of each measurement, please wait for at least 3 minutes before taking another measurement.

    How to toggle between °C and °F:

    Press switch to turn on and hold it down until the display shows Lo°C (with no flash), release the switch and within 2 seconds press it again. You do this to change from °C to °F or back.

  • Functions


    The mouth should remain closed for up to 5 minutes before taking a reading. Place the probe well under the tongue. Instruct child not to bite the probe. Measurement time = 8-15 seconds. Under


    The armpit is not an ideal site to measure body temperature because you’re measuring the surface of the skin and not a closed body cavity. Ensure the armpit is dry. Place the thermometer under the armpit and press arm tightly next to the body. Ensure the sensor is covered under the armpit. We recommend a longer measuring time of 60+ seconds for this method

  • Still need help?

    If you’re still looking for an answer, get in touch with us here
  • How to clean

    • Make sure the sensor is clean to ensure an accurate reading.
    • We recommend you clean the sensor before every measurement.
    • The thermometer is waterproof and can be wiped clean with water or cleaning lotion.
    • We recommend using a 70% alcohol swab or cotton wool moistened with 70% alcohol to gently wipe the probe and sensor clean.
    • Do not immerse in boiling water for sterilising.
  • How to replace the batteries

      • If the display becomes blurred or if this symbol appears on the LCD, the battery must be replaced.
      • To replace the battery, open the cover using a coin and remove the battery.
      • Replace with a new battery (CR2032) then re-insert the cover with the coin, taking care not to damage the waterproof ring.

      How to replace battery with description above

      • To prevent battery corrosion, remove batteries from unit if you don’t intend to use it for some time.
      • Batteries should always be removed or replaced by an adult. Keep batteries away from children. Remove batteries if the Thermometer will not be used for so
  • Still need help?

    If you’re still looking for an answer, get in touch with us here

We’ve prepared some common questions and troubleshooting advice to help you with your new FlexiPen digital thermometer.

  • Who is this Who is this thermometer suitable for?suitable for?

    Suitable for use from birth and can be used for the whole family.

  • Does the thermometer require batteries?

    Yes, 1x CR2032 battery is provided with the product so it can be used straight away after purchase

  • Does the thermometer provide readings in Celsius and Fahrenheit?

    Yes, you can display the temperature in either Celsius or Fahrenheit and you can easily toggle between them according to your preference. Your last selection will be remembered for the next use.

  • How quickly will the temperature reading be displayed?

    The measurement time differs according to the method used to read body temperature:

    In-mouth: Measurement time 8-15 seconds. 

    Under armpit: Measurement time 60+ seconds.

  • How accurate are the temperature readings?

    This digital thermometer provides a precise reading with an accuracy of +/-1°C
  • How does the fever alert function work?

    If your baby’s temperature is too high and records a reading of 37.6°C or above, a red light will flash and an alarm will sound to warn of a possible fever, helping to eliminate any doubt.
  • How does the memory function work?

    The digital thermometer stores the last reading, allowing you to monitor baby's temperature over time with ease. 
  • Is the thermometer waterproof?

    The unit is rated IP22 which means it’s safe to use with damp hands, wipe clean and place in the mouth for temperature readings, but do not fully immerse the product into water.  
  • Will the thermometer automatically switch off when not in use?

    Yes, the practical automatic shut-off feature helps to prolong battery life. 
  • Is the thermometer supplied with a protective cover?

    Yes, we have supplied a practical cover so you can keep the baby thermometer clean and hygienic between uses.
  • Still need help?

    If you’re still looking for an answer, get in touch with us here