On Structure: The electronic thermometer comprises three components.
- The sensor part functions to receive body heat waves.
- The LCD screen displays temperature measurement results.
- Power button.
Principle of Operation: Electronic thermometers operate based on temperature sensors at contact points, or use thermal sensors to measure temperature. When the thermometer makes contact with the measuring part, the sensor collects information, transmits it to the electronic panel, and displays the result on the screen.

Electronic thermometers are considered an indispensable medical tool in every household medicine cabinet
2. Step-by-step Guide on 4 Simple and Effective Uses of Electronic Thermometers
Electronic thermometers can measure at various locations on the body, helping us obtain the most accurate information about body temperature.
2.1 Using Electronic Thermometer to Measure Rectal Temperature
Measuring rectal temperature is often applied for the most accurate results. Especially suitable for infants and young children:
- Step 1: Have the baby lie on their stomach.
- Step 2: Turn on the thermometer device, it's recommended to lubricate the thermometer's tip with vaseline before inserting it into the rectum.
- Step 3: Insert the thermometer into the rectal opening until the white part of the thermometer is no longer visible.
- Step 4: After hearing the successful “Beep” signal, remove the thermometer.
- Step 5: Read the result displayed on the LCD screen.
2.2 Using Electronic Thermometer to Measure Oral Temperature
Measuring temperature orally helps us quickly know the current body temperature. This method is applicable for children aged 4 and above and after a 30-minute gap after eating.
- Step 1: Turn on the thermometer device.
- Step 2: Place the thermometer's tip under the tongue. Close lips around the thermometer.
- Step 3: Remove the thermometer from the mouth after hearing the “Beep” sound.
- Step 4: Read the displayed body temperature result.
2.3 Using Electronic Thermometer to Measure Armpit Temperature
The armpit area usually provides relatively less accurate results. However, if you cannot measure in other areas, perform this method to check for any fluctuations in body temperature.
- Step 1: Dry the armpit area that needs temperature measurement.
- Step 2: Turn on the thermometer device.
- Step 3: Place the thermometer's tip in the armpit crease, hold the arm close to the body.
- Step 4: Remove the thermometer from the armpit upon hearing the successful signal.
- Step 5: Read the result displayed on the screen.

When measuring in the armpit, ensure the thermometer contacts the skin and not clothing during the measurement
2.4 Using Electronic Thermometer to Measure Ear Temperature
Infrared electronic thermometers are often used more to measure body temperature in the ear. This method applies to children aged 6 months and above, and after at least 15 minutes if coming in from cold outdoor temperatures.
- Step 1: Have the person to be measured sit upright. Ensure the ear area is clean.
- Step 2: Turn on the power button of the thermometer device.
- Step 3: Insert the thermometer into the ear, simultaneously pulling the earlobe slightly outward.
- Step 4: Hold for about 2 - 3 seconds and remove the thermometer upon hearing the “Beep” sound.
- Step 5: Read the result.
DO YOU KNOW WHERE TO USE THE THERMOMETER MOST ACCURATELY? There are various locations on the body to obtain temperature readings. Among them, the most common are the mouth, ear, armpit, and rectum. However, not every location can provide the most accurate body temperature results. According to experts, the rectum or anus is the position that can provide the most accurate body temperature, while the armpit position may have a large margin of error when measuring temperature. |
3. Some Notes When Using Electronic Thermometer for Efficiency and Safety
Although using an electronic thermometer is quite straightforward, to achieve accurate and safe results, you also need to keep in mind a few tips like the following:
3.1 Choose reputable and genuine electronic thermometers

Choosing a high-quality electronic thermometer from a reputable brand also contributes to better effectiveness when using
Ideally, you should purchase a thermometer from reliable pharmacy chains or electronics centers. At Mytour, you can easily find electronic thermometers & healthcare devices in general of high quality, originating from renowned brands.
Check product details, prices, and the latest promotions HERE.
3.2 Important Criteria to Know When Selecting an Electronic Thermometer
When purchasing an electronic thermometer, prioritize selecting products as follows:
- Compact design, easy to grip, convenient for measuring body temperature at various locations.
- High accuracy results, minimal margin of error.
- Large memory capacity to help users track and analyze more effectively.
- Clear and sharp display for easy observation and result reading.
- Long-lasting and stable battery life.
- Additional features such as continuous alert function, red light indicator on the screen when body temperature rises too high.
3.3 Ensure Cleanliness of the Electronic Thermometer Before and After Use
Maintaining the cleanliness of the thermometer not only ensures high accuracy in measurements but also prolongs the product's lifespan. Use clean cotton or fabric soaked in a bit of alcohol solution to gently wipe the thermometer's tip. Avoid direct washing with water as it can cause damage and increase measurement inaccuracies.
3.4 Perform Measurements in the Correct Sequence
Follow the instructed steps to ensure the most accurate results. Space each measurement about 2 - 3 minutes apart, avoiding continuous measurements as they may lead to significant inaccuracies. When the person being measured has just come from an extremely cold or hot environment, wait at least 30 minutes before starting the measurement.

Read the instructions carefully regarding the procedures and usage of the electronic thermometer to ensure effectiveness and safety when using this tool
Hope the article on using electronic thermometers and essential tips has provided you with valuable information. If you have any questions or additional experiences to share, feel free to discuss them below the article.