When Choosing A Thermometer, What Is Most Important To You?

1. Accuracy   The higher the accuracy of the thermometer, the smaller the error, which can help us better grasp the accurate body temperature and monitor the development of the disease.

2. Measurement speed    The temperature measurement can be completed in a short time, which is more convenient when helping the baby measure the temperature.

3. Versatility      In addition to measuring body temperature, it can also measure the temperature of other objects, which greatly facilitates our lives.

4. Good quality    When choosing a good thermometer, quality is the key. It is not easy to break and can better protect the safety of yourself and your family; it is durable, so that it can protect the health of your family for a long time!

At present, thermometers are mainly divided into two categories: mercury thermometers and electronic thermometers, among which electronic thermometers are divided into pen-type electronic thermometers and infrared thermometers.

Mercury Thermometer

Temperature measurement principle of mercury thermometer Mercury in the thermometer expands and contracts due to temperature changes. Mercury has excellent thermal conductivity. Even if the temperature changes slightly, the volume will change accordingly.

Advantages of mercury thermometer High accuracy, good stability, low price, and no external power supply required.

Disadvantages of mercury thermometer Mercury is used in mercury thermometers. If it is accidentally broken, the volatilization of mercury will seriously endanger our health, and the broken mercury thermometer fragments may also cause harm to the body. Many countries around the world have banned it.

In addition, mercury thermometers take a long time to measure and are not easy to read. Before using a mercury thermometer each time, the scale must be shaken to below 35°C, and it must be clamped under the armpit and kept tightly for 3 to 5 minutes.

Pen-type electronic thermometer

The temperature measurement principle of pen-type electronic thermometer uses the definite relationship between the physical parameters of certain substances (such as resistance, voltage, current, etc.) and the ambient temperature to display the body temperature in digital form.

Advantages of pen-type electronic thermometer Electronic thermometer reading is intuitive, easy to carry, small and novel, not easy to damage, easier to keep than ordinary mercury thermometer, and can measure axillary temperature, oral temperature and rectal temperature.

Clinical trials have proved that electronic thermometers use thermistor principle to measure temperature and have the same accuracy as mercury thermometers. In addition, mercury thermometers only have whole-degree scales, and decimal scales can only be observed with the naked eye. The readings will also have slight deviations at different angles of reading the scale, while the readings of electronic thermometers can be accurate to 0.01, which is more accurate.

Infrared Thermometer

Principle of infrared thermometer Body temperature is measured by infrared. The infrared heat radiation of the human body is focused on the detector, which converts the radiation power into an electrical signal. The electrical signal can be displayed in units of temperature after being compensated for the ambient temperature.

Advantages of infrared thermometers It is convenient, simple, fast and quite accurate to collect body temperature.

Infrared thermometers are mostly divided into contact and non-contact types. Contact infrared thermometers are mainly ear thermometers, and non-contact infrared thermometers are mainly forehead thermometers.

Among them, ear thermometers can quickly measure temperature in 1 to 2 seconds. Put the probe deep into the ear canal and press the measurement button.

It should be noted that if there are children under 2 years old at home, do not use ear thermometers. The ear canal is not straight. When measuring the temperature, parents must pull the child's ear canal straight to measure accurately. The operation requirements are high. If the operation is improper, the ear canal will be injured.

Forehead thermometers are both non-contact and contact. The non-contact forehead thermometer is about 3 to 5 cm away from the forehead when measuring. The contact forehead thermometer measures temperature directly against the forehead, which can avoid temperature measurement deviation caused by inaccurate distance estimation. At the same time, zero-distance measurement minimizes environmental impact.