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TempChek FC-IR100 Dual Mode Ear Thermometer

TempChek FC-IR100 Dual Mode Ear Thermometer

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  • ✔️ Detects fever in 1–2 seconds via infrared tympanic technology
  • ✔️ Dual mode: ear and forehead measurement in one device
  • ✔️ Suitable for adults, children, and infants over 3 months
  • ✔️ Colour-coded fever alerts for instant, clear interpretation
  • ✔️ Backlit display for accurate readings in low-light conditions

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What Is an Ear Thermometer and How Can It Help You?

 

When someone in your household feels unwell, knowing their temperature quickly can make a real difference. The ear thermometer has become one of the most trusted tools for checking body temperature at home — and for good reason. The TempChek FC-IR100 Dual Mode Ear Thermometer from Cured Pharmacy gives you a fast, reliable reading in seconds, whether you're checking on a restless toddler at 2am or monitoring your own temperature during a bout of cold or flu. At just £14.99, it's an accessible addition to any home first aid kit.

Fever is one of the body's natural responses to infection. The NHS defines a high temperature as 38°C or above in adults and children. Catching a rising temperature early means you can act sooner — whether that's giving appropriate medication, keeping someone comfortable, or knowing when to seek medical advice. You'll find the TempChek FC-IR100 listed in our First Aid collection, alongside other essential home health products.

 

How Does the TempChek FC-IR100 Dual Mode Thermometer Work?

 

The FC-IR100 uses infrared sensor technology to detect the heat energy naturally emitted by the tympanic membrane — that's the eardrum — and the surrounding tissue inside the ear canal. Because the eardrum shares blood supply with the hypothalamus (the brain's temperature-regulating centre), tympanic readings closely reflect core body temperature. The result appears on the digital display within one to two seconds.

  • An infrared sensor detects thermal radiation from the eardrum
  • The device converts this energy into a precise temperature reading
  • The dual mode function also allows forehead (temporal artery) scanning
  • A backlit display shows the reading clearly, even in low light
  • Colour-coded alerts help you interpret results at a glance

 

Who Should Use the TempChek FC-IR100 Ear Thermometer?

 

This thermometer is designed for everyday family use. It's suitable for adults, older children, and infants over three months of age. The NHS advises that tympanic thermometers are not recommended for babies under three months, as the ear canal may be too narrow for a reliable reading — a digital thermometer placed in the armpit is preferred for newborns.

The FC-IR100 is particularly well suited to:

  • Parents monitoring young children with suspected fever
  • Adults tracking their own temperature during illness
  • Carers looking after elderly relatives at home
  • Anyone who needs a quick, non-invasive temperature check

 

How Does the TempChek FC-IR100 Compare to Other Thermometer Types?

 

Feature TempChek FC-IR100 Standard Digital Thermometer
Reading speed 1–2 seconds 60–90 seconds
Measurement modes Ear and forehead (dual mode) Oral, rectal, or axillary only
Suitable for sleeping children Yes (forehead mode) Difficult without waking child
Age suitability 3 months and above All ages including newborns

 

Is the TempChek FC-IR100 Suitable for Use With Ear Conditions?

 

If you or a family member has an active ear infection, a perforated eardrum, or significant earwax build-up, tympanic readings may be less accurate or uncomfortable. In these situations, the forehead mode offers a practical alternative without any contact with the ear canal. It's worth noting that earwax can block infrared signals and skew results — if you're concerned about earwax, our Ear, Nose and Throat collection includes products that may help.

The TempChek FC-IR100 ear thermometer is a medical device, not a medicine, so it does not carry the same contraindications as pharmaceutical products. That said, always read the instructions before use and consult your GP or pharmacist if you have any concerns about using it alongside an existing ear condition.

This product is a medical device. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

TempChek FC-IR100 Dual Mode Ear Thermometer specifications
Treatment category Temperature monitoring / diagnostics
Mechanism of action Infrared tympanic and temporal artery temperature detection
Effective for Detecting fever in adults, children, and infants over 3 months
Suitable for Adults, children (3 months+), elderly individuals
Active ingredient N/A — medical device
Pack size 1 thermometer with probe covers
UK classification Medical device (CE/UKCA marked)
Preparation Handheld infrared thermometer
Route of administration Tympanic (ear) or temporal (forehead)

Specifications of TempChek FC-IR100 Dual Mode Ear Thermometer

 

What Is the TempChek FC-IR100 and What Is It Used For?

 

The TempChek FC-IR100 Dual Mode Ear Thermometer is a handheld infrared medical device used to measure body temperature quickly and non-invasively. It operates in two modes: tympanic (ear canal) and temporal (forehead), making it versatile for use across different age groups and situations. It is used primarily to detect fever — a temperature of 38°C or above — which can be a sign of infection, illness, or other medical conditions. The NHS recommends monitoring temperature at home as part of managing common illnesses such as colds, flu, and COVID-19.

This device is not a medicine. It does not treat fever directly but helps you identify when a fever is present so you can take appropriate action, such as administering suitable pain relief and fever-reducing medication or seeking medical advice.

 

What Do You Need to Know Before Using the TempChek FC-IR100?

 

As a medical device rather than a medicine, the FC-IR100 does not carry pharmaceutical contraindications. However, there are important considerations to be aware of before use:

  • Do not use in an ear with a known perforated eardrum without first consulting your GP
  • Avoid use if the ear canal is visibly blocked with earwax — this can cause inaccurate readings
  • Do not use in an ear with an active outer ear infection (otitis externa) as this may cause discomfort
  • Tympanic mode is not recommended for infants under 3 months — use forehead mode or an axillary digital thermometer instead
  • Allow the thermometer to acclimatise to room temperature for 30 minutes if brought in from a cold environment
  • Always fit a new probe cover before each use to maintain hygiene and accuracy

There are no known drug interactions, as this is a non-invasive diagnostic device. However, if you are using ear drops or have recently had ear surgery, speak to your pharmacist before using the tympanic mode.

  • No known drug interactions
  • Not affected by medications the user is taking

 

How Should You Use the TempChek FC-IR100 Correctly?

 

Getting an accurate reading depends on correct technique. Follow these steps carefully each time you use the thermometer:

  1. Wash your hands before handling the device
  2. Attach a clean, unused probe cover to the tip of the thermometer
  3. For ear mode: gently pull the outer ear upward and backward (for adults) or backward only (for children) to straighten the ear canal
  4. Insert the probe tip gently but snugly into the ear canal — do not force it
  5. Press and hold the measurement button until you hear a beep
  6. Remove the thermometer and read the temperature on the backlit display
  7. For forehead mode: hold the device 1–3 cm from the centre of the forehead and press the button
  8. Dispose of the used probe cover safely and store the device in its case
Indication Age Group Recommended Mode Normal Range
Fever monitoring Adults (16+) Ear (tympanic) 36.1°C – 37.2°C
Fever monitoring Children (3 months – 15 years) Ear or forehead 36.4°C – 37.2°C
Fever monitoring Infants (under 3 months) Forehead only 36.4°C – 37.2°C
Routine wellness check Elderly adults Ear (tympanic) 35.8°C – 37.2°C

 

What Are the Possible Side Effects of the TempChek FC-IR100?

 

Because this is a non-invasive medical device, it does not cause systemic side effects in the way medicines do. However, there are a small number of device-related issues that can occasionally occur.

Common issues:

  • Slightly inaccurate readings if the probe is not positioned correctly in the ear canal
  • Lower-than-expected readings if earwax is present
  • Discomfort if the probe is inserted too forcefully

Less common issues:

  • Mild irritation of the ear canal if the probe cover is not used
  • Error messages on the display if the device is used outside its operating temperature range
  • Inconsistent forehead readings in very cold or very warm ambient conditions

If you notice persistent ear discomfort after use, stop using the tympanic mode and consult your GP. You may also find relevant support in our Cold and Flu collection if you're managing associated symptoms alongside monitoring temperature.

 

How Should You Store the TempChek FC-IR100?

 

Proper storage keeps the device accurate and extends its lifespan. Follow these guidelines:

  • Store at room temperature between 10°C and 40°C
  • Keep away from direct sunlight, moisture, and humidity
  • Store in the protective case provided when not in use
  • Remove batteries if the device will not be used for an extended period
  • Keep out of reach of children when not in use
  • Do not store near strong electromagnetic fields or electronic equipment
  • Replace probe covers regularly — do not reuse them between individuals

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Frequently Asked Questions

Where can I buy the TempChek FC-IR100 ear thermometer online in the UK?

You can buy the TempChek FC-IR100 Dual Mode Ear Thermometer directly from Cured Pharmacy online for £14.99, with fast UK delivery. It is available without a prescription as it is a medical device. You'll find it listed in our Electrical Health and Diagnostic collection alongside other home monitoring devices.

How does an infrared ear thermometer measure body temperature?

An infrared ear thermometer detects the thermal radiation emitted by the tympanic membrane (eardrum), which reflects core body temperature because the eardrum shares blood supply with the brain's temperature-regulating centre. The sensor converts this infrared energy into a digital temperature reading within one to two seconds. This makes it one of the fastest and least invasive methods of temperature measurement available for home use.

How do I use the TempChek FC-IR100 step by step?

Attach a clean probe cover, gently pull the outer ear upward and backward to straighten the ear canal, then insert the probe snugly and press the measurement button. The reading appears within one to two seconds on the backlit display. Always dispose of the probe cover after each use and never share the device between individuals without fitting a fresh cover.

What is a normal temperature reading on an ear thermometer?

The NHS states that a normal body temperature is around 37°C, though this can vary slightly between individuals and throughout the day. A reading of 38°C or above is generally considered a fever in both adults and children. If a child under three months has a temperature of 38°C or higher, seek urgent medical advice immediately.

Can I use the TempChek FC-IR100 on a newborn baby?

Tympanic (ear) mode is not recommended for babies under three months old, as the ear canal is often too small and narrow for an accurate reading. For newborns, the NHS recommends using a digital thermometer placed in the armpit instead. The FC-IR100's forehead mode can be used as an alternative for very young infants, though axillary measurement remains the gold standard for this age group.

Is an ear thermometer as accurate as a rectal thermometer?

Rectal thermometry is considered the most accurate method for measuring core body temperature, particularly in young children, but it is invasive and uncomfortable. Infrared ear thermometers, when used correctly with proper technique, provide clinically acceptable accuracy for home use. Factors such as earwax, incorrect probe positioning, or a recent ear infection can affect the reading, so always follow the instructions carefully.

What is the difference between ear mode and forehead mode on the FC-IR100?

Ear mode uses infrared technology to measure the temperature of the tympanic membrane inside the ear canal, which closely reflects core body temperature. Forehead mode scans the temporal artery across the forehead surface and is useful for sleeping children or situations where ear access is difficult. Ear mode is generally considered more accurate for adults and older children, while forehead mode offers a convenient, contactless alternative.

Can earwax affect the accuracy of an ear thermometer reading?

Yes — a significant build-up of earwax can block the infrared sensor's line of sight to the eardrum, resulting in a lower-than-actual temperature reading. If you suspect earwax is affecting your results, switch to forehead mode for the time being. You can find earwax management products in our Ear, Nose and Throat collection to help address the underlying issue.

Who is eligible to use the TempChek FC-IR100 ear thermometer?

The FC-IR100 is suitable for adults, children aged three months and over, and elderly individuals. It is not recommended for use in the ear of infants under three months, those with a perforated eardrum, or those with an active outer ear infection without medical advice. The forehead mode extends its usability to a wider range of users, including those for whom ear measurement is not appropriate.

What should I do if my child has a fever detected by the ear thermometer?

If your child has a temperature of 38°C or above, the NHS advises keeping them comfortable, ensuring they drink plenty of fluids, and considering age-appropriate fever-reducing medication such as paracetamol or ibuprofen. If your child is under three months with a fever, or if the fever is very high or accompanied by other concerning symptoms, seek urgent medical attention. Do not use aspirin in children under 16.

How do I clean and maintain the TempChek FC-IR100?

Wipe the exterior of the device with a soft, slightly damp cloth — never immerse it in water or use alcohol-based cleaners directly on the probe lens. Always use a fresh probe cover for each measurement to maintain hygiene and prevent cross-contamination. Store the device in its protective case at room temperature when not in use.

How long do the batteries last in the TempChek FC-IR100?

Battery life will vary depending on frequency of use, but most infrared ear thermometers of this type provide several hundred measurements per set of batteries under normal conditions. If the display shows a low battery indicator, replace the batteries promptly to ensure continued accuracy. Remove batteries if the device will be stored unused for a prolonged period.

What are the alternatives to an ear thermometer for measuring temperature at home?

Alternatives include digital oral thermometers (placed under the tongue), axillary thermometers (placed in the armpit), forehead strip thermometers, and rectal thermometers for young infants. Each method has different accuracy levels and suitability by age group. The NHS recommends digital thermometers over mercury or forehead strip types for home use due to their greater reliability.

Can I use the TempChek FC-IR100 if I have an ear infection?

If you have an active outer ear infection (otitis externa) or a middle ear infection (otitis media), using the tympanic mode may be uncomfortable and could produce inaccurate readings due to inflammation and fluid in the ear canal. In this situation, use the forehead mode instead. Always consult your GP if you suspect an ear infection, as these may require treatment.

How long can I keep using the TempChek FC-IR100 thermometer?

With proper care and maintenance, a quality infrared ear thermometer can last for several years. Regularly check that the probe lens is clean and undamaged, replace batteries as needed, and always use probe covers to protect the sensor. If you notice consistently inconsistent or unusual readings despite correct technique, it may be time to replace the device.

How Should You Use the TempChek FC-IR100 Ear Thermometer?

Using the TempChek FC-IR100 correctly is straightforward, but technique matters. An incorrectly positioned probe is the most common reason for an inaccurate reading, so take a moment to follow these steps each time.

If you get an unexpectedly low or high reading, wait 30 seconds and repeat the measurement in the same ear. Consistent results across two readings are more reliable than a single measurement.

What Is the Correct Dose of the TempChek FC-IR100?

As a medical device, the FC-IR100 does not have a "dose" in the pharmaceutical sense. However, the table below outlines the recommended measurement mode and expected normal temperature ranges by age group and indication, based on NHS guidance.

When Is the Best Time to Use the TempChek FC-IR100?

Temperature naturally fluctuates throughout the day — it tends to be lowest in the early morning and highest in the late afternoon or early evening. For the most consistent monitoring during illness, try to take readings at the same time each day and record the results. Avoid taking a temperature immediately after exercise, a hot bath, or eating and drinking, as these activities can temporarily affect the reading.

If you are monitoring a child with a fever overnight, the forehead mode is particularly useful as it allows you to check their temperature without fully waking them. Always allow the thermometer to reach room temperature before use if it has been stored somewhere cold.

How Long Can You Use the TempChek FC-IR100 For?

The TempChek FC-IR100 is a durable home medical device designed for repeated, long-term use. There is no set expiry period, but you should periodically check that the probe lens is clean and undamaged, and that the device is producing consistent readings. Replace the batteries when the low battery indicator appears, and always ensure you have an adequate supply of probe covers.

If you notice the device consistently producing readings that seem inconsistent with the person's clinical presentation — for example, a reading of 35°C in someone who clearly appears unwell — consider replacing the device or having it checked. Thermometers, like all medical devices, can degrade over time with heavy use.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Issues Associated With Using an Ear Thermometer?

Because the TempChek FC-IR100 is a non-invasive medical device rather than a medicine, it does not cause systemic side effects. However, there are some common device-related issues that users occasionally experience, most of which are related to technique or device maintenance rather than any inherent risk of the product itself.

  • Inaccurate or inconsistent readings due to incorrect probe positioning in the ear canal
  • Lower-than-expected temperature readings caused by earwax blocking the infrared sensor
  • Error messages on the display if the device is used outside its recommended operating temperature range
  • Slightly different readings between the left and right ear — this is normal and not a cause for concern

What Are the Less Common Issues With Ear Thermometer Use?

Less frequently, users may encounter the following issues. These are generally minor and easily resolved by adjusting technique or device care.

  • Mild discomfort or pressure sensation in the ear canal if the probe is inserted too forcefully
  • Irritation of the ear canal if the device is used repeatedly without a probe cover
  • Inconsistent forehead readings in very cold or very warm ambient environments
  • Display errors if the battery is low — replace batteries promptly when the indicator appears

If you experience persistent ear discomfort after using the tympanic mode, discontinue ear use and switch to forehead mode. Consult your GP if the discomfort continues, as it may indicate an underlying ear condition unrelated to the thermometer.

What Are the Serious Risks of Using an Ear Thermometer Incorrectly?

Serious adverse events from infrared ear thermometers are extremely rare when the device is used as directed. The most clinically significant risk is not physical harm but rather acting on an inaccurate reading — for example, missing a fever in a young child or an elderly person because the probe was not correctly positioned. Always repeat the measurement if you are uncertain, and use the forehead mode as a cross-check if needed. Never rely solely on a thermometer reading if someone appears seriously unwell — seek medical attention promptly.

What Should You Do If You Experience Problems With the Device?

If the thermometer is producing readings that seem inconsistent with the person's clinical condition, first check that the probe cover is fitted correctly and that the ear canal is free from visible obstruction. Ensure the device has been at room temperature for at least 30 minutes before use. If problems persist, contact Cured Pharmacy for support or consider replacing the device. Do not attempt to repair or disassemble the thermometer yourself.

Can the TempChek FC-IR100 Interact With Other Medical Devices or Medicines?

As a passive infrared measurement device, the FC-IR100 does not interact with medicines or other medical devices in any clinically meaningful way. It does not emit radiation, electrical current, or any substance into the body. However, strong electromagnetic fields — such as those near MRI machines or certain industrial equipment — could theoretically interfere with the device's electronics, so avoid using it in such environments. If you use hearing aids, remove them before taking an ear temperature reading to ensure the probe can be correctly positioned.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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