No more counting temperature lines on the analogue thermometer. Just read the temperature on the screen! You want to know immediately how warm it is outside or in your home? Thanks to digital thermometers, you can simply read the temperature on the display. The measurement is also lightning fast and the data appears on the screen without delay.
You never have to wait for the thermometer liquid to expand. Our digital thermometer test 2021 will help you with your purchase decision. We show you the advantages and disadvantages of digital thermometers and which criteria can be used to distinguish between different models. Finally, we answer all your questions about the topic in our guide.
- 1 Weekly newsletter with the best personal finance tips
- 2 Summary
- 3 The Best Digital Thermometer: Our Choices
- 4 Buying and evaluation criteria for digital thermometers
- 5 Guide: Questions you should ask yourself before buying a digital thermometer
- 5.1 What is special about a digital thermometer and what advantages does it offer?
- 5.2 What types of digital thermometers are there?
- 5.3 For whom are digital thermometers suitable?
- 5.4 How much does a digital thermometer cost?
- 5.5 How do I measure my room temperature correctly?
- 5.6 In what other areas are digital thermometers used?
- 5.7 Digital infrared thermometers
- 5.8 What alternatives are there to digital thermometers?
- The digital thermometer measures more accurately than the analogue one. The digital measurement is also faster and you can easily read the temperature on the screen.
- Most digital thermometers can measure humidity and air pressure in addition to temperature. Very expensive models include even more functions, so that they serve as a small weather station.
- We recommend buying a digital thermometer if you want to know the temperature at a glance. We also recommend a digital thermometer for those interested in the weather, as you can store and evaluate the measured data.
The Best Digital Thermometer: Our Choices
Buying and evaluation criteria for digital thermometers
There are countless digital thermometers on the market. Especially on the internet, the range is huge. We show you the most important evaluation criteria with which you can distinguish between different models. When buying a digital thermometer, look for the following criteria:
You can read more about the individual criteria in the following paragraphs:
An important difference between different thermometer models is the measuring range. It describes the range between the lowest and the highest temperature that can be measured with this device. Which measuring range is most suitable depends on the intended use. For example, a thermometer for measuring room temperature ideally has a measuring range of -10° to +40° degrees Celsius.
It is highly unlikely that the temperature of a room will fall below -10°. Extending the range downwards is therefore unnecessary. An outdoor thermometer, however, must indicate much lower temperatures, depending on the location. For this, it needs a measuring range that goes deep into the minus. A measuring range of -30° to +50° is therefore suitable for outdoor thermometers.
Other types of thermometers are built for a smaller specific measuring range. A clinical thermometer, for example, only measures between 35° and 42°, while the measuring range of a refrigerator thermometer is -10° to -30°.
The size of the thermometer varies greatly depending on the model. The smallest models are only a few centimetres in size. They can be bought as key rings, for example.
However, you can also buy a digital thermometer that is 20 by 20 centimetres. However, such a thermometer usually has more functions than just measuring temperature (measuring humidity, weather forecast...). These digital thermometers serve as small weather stations.
A big advantage of digital thermometers over analogue ones is the accurate measurement result. Digital thermometers can indicate the temperature accurately to decimal places. We recommend that you buy a thermometer that gives the temperature to tenths of a degree. This is ideal for measuring air temperature.
Whole degrees Celsius would be too inaccurate, but more accurate readings than the first decimal place are unnecessary. Most digital thermometers have a measuring accuracy of +/- 1° and a display accuracy of +/- 0.1°. The display accuracy describes how detailed the value is on the screen.
However, it has no influence on the measuring accuracy. A device can therefore measure very accurately, for example to three decimal places, but only display this value rounded to one decimal place.
Other measuring functions included
Depending on the model, a thermometer can also measure other values than just temperature. Very often it is the humidity. Such instruments are called thermo-hygrometers. We especially recommend this device because it allows you to keep an eye on the humidity of your indoor space. It helps you to avoid mould.
is a device that measures humidity as well as temperature. Some temperature meters can also measure air pressure. They are called thermo-barmeters. For normal use, you rarely need this function. However, if you are interested in the weather, we highly recommend it for your outdoor thermometer. Air pressure is crucial for making a weather forecast. Many digital thermometers also show the current time.
For weather enthusiasts, there are even professional thermometers that serve as a small weather station. In addition to hygrometer, barometer and time, a weather forecast can be displayed. Other functions such as frost alarm, alarm clock or information on wind and moon phases are also included. The collected data can be recorded and saved.
Guide: Questions you should ask yourself before buying a digital thermometer
In order to support you in buying a digital thermometer, we answer the most important questions in the following section.
What is special about a digital thermometer and what advantages does it offer?
You can't misread the temperature because you miscounted the temperature bars. Measuring with a digital thermometer is also more accurate than with an analogue one. In addition, depending on the model, it is possible to store and evaluate the temperature data recorded.
If the temperature changes, it takes about five minutes for an analogue thermometer to display it correctly. The reason: it always takes a moment for the thermometer fluid to expand. Watch out: If you still have a mercury thermometer at home, be careful!
Mercury is a highly toxic heavy metal. If you break such a thermometer, you must be extremely careful. Mercury is already in a liquid state at normal room temperature. If it evaporates, there is a great health risk. When it evaporates, toxic vapours are produced. If these are inhaled, mercury poisoning occurs.
What types of digital thermometers are there?
|Digital outdoor thermometers||measuring range down to minus (°C), usually waterproof, decorative, usually various measuring functions||higher price (especially with several measuring functions)|
|Digital indoor thermometers||often cheaper than outdoorthermometers, may also serve as a decorative piece||only measuresindoor temperature, fewer functions (temperature, temperature). also serves as a decorative piece||only measures indoor temperature, fewer functions (temperature, humidity, pressure)|
|Digital radio thermometers||exact measurement data thanks to external sensors, indoor and outdoor climate compared, transmission to outdoor sensor works wirelessly||often more expensive, sensors must be installed outside|
In the following sections you can learn more about the individual thermometer types:
For whom are digital thermometers suitable?
A digital display is also easier to read. We also deliberately recommend a digital measuring device for older people.
Visual perception deteriorates with age. This is when it is a great advantage not to have to count the lines on the analogue thermometer. On digital thermometers you can read the temperature in large numbers on the screen. Digital thermometers are also ideal for hobby weather researchers and weather enthusiasts.
You can take many other measurements in addition to the temperature. You can have the data saved automatically and then evaluate them directly on the computer. Take a look at the third favourite model of the editorial team (above) as an example.
How much does a digital thermometer cost?
Good digital thermometers for indoors and outdoors can be bought from 12 euros. However, the price range to the most expensive products is huge. For a thermometer that almost serves as a weather station, you can spend a good 100 to 250 euros. These measuring devices have a correspondingly large number of functions. For example, they have animated weather forecasts, a calendar, an alarm clock, a moon phase display and data recording. You can buy a good radio thermometer for around 15 to 40 euros.
Of course, you can also spend more money on such a thermometer if you want additional services. In the table below, we have listed the prices of the different types of digital thermometers. Thanks to the bottom line, you can also compare the prices of digital and analogue thermometers.
|Average prices:||With extras (additional functions)|
|Digital thermometer for indoor or outdoor use only||8 € - 18 €||up to 100€|
|Digital thermometer for indoor and outdoor temperature||12 € - 75 €||100€ - 250€|
|Digital wireless thermometer||15 € - 40 €||100€ -250€|
|Analogue thermometer||1 € - 20€||up to about 75€|
You can buy simple analogue thermometers for as little as one euro. These inexpensive products are therefore not very high quality. However, you can spend up to 75 euros on an analogue thermometer. This price is due to better design, easier readability or better accuracy.
How do I measure my room temperature correctly?
Ideal place: We recommend placing the thermometer in the middle of the room. It is important to ensure that no source of heat or cold has a direct influence on the measuring device. For example, it should not be exposed to direct sunlight or be installed next to the heating.
However, there are other objects that emit heat and falsify your readings: People or even electronic devices such as a computer. A refrigerator that is often opened or a window that is left open is considered a cold source.
Ideal height: Your readings will be most accurate if you install your thermometer or sensor one to two metres above the ground.
Accuracy: Of course, it is not only the location of the measuring device that matters. Even the best installation is useless if the device measures inaccurately. It is therefore important that your thermometer has an accuracy of ± 0.5 °C maximum.
In what other areas are digital thermometers used?
Digital clinical thermometers
Unfortunately, it happens from time to time that we do not feel well and want to measure our body temperature. Then a precise clinical thermometer is needed. Digital clinical thermometers are very accurate. These modern devices measure the temperature either on the forehead or in the ear. With the ear, it is important to place the thermometer in the correct position of the ear.
This becomes difficult if, for example, a sick child moves around a lot or resists having his or her temperature taken. Then there is hygiene: a protective cap must always be used for the ear. These end up in the rubbish after use. You therefore have to buy new protective caps and produce waste.
We therefore recommend that you buy a clinical thermometer for the forehead. You should not use analogue mercury thermometers because mercury is highly toxic. However, you can now buy analogue thermometers that work with liquids other than mercury.
Digital fridge thermometers
It is also important to know the temperature of your refrigerator. Most refrigerators are set too cold. However, if it is set too warm, this quickly becomes a problem as the food can run off. To keep an eye on the temperature, refrigerators use digital thermometers.
Thanks to the display, you can easily read the temperature. Often, digital fridge thermometers have a built-in alarm that sounds if the inside of the fridge is too warm. However, there are also analogue models for the fridge.
They are cheaper and can sometimes also be used for the freezer compartment. However, it is more difficult to read the temperature on an analogue thermometer than on a digital one.
Digital infrared thermometers
The measurement is also very fast and accurate. Infrared thermometers have a much larger measuring range than air thermometers.
Digital meat thermometer
A meat thermometer helps you to prepare your roast in the oven perfectly. This type of thermometer is also called a barbecue thermometer, roast thermometer or kitchen thermometer. It is used to find out the ideal cooking time for food. Without such a thermometer, you will take your roast out of the oven even though it is still completely raw inside.
To prevent this, the thermometer measures the core temperature of the meat. However, many of these devices are not only suitable for meat, but also for fish, bread, cakes and baby food, for example. With digital meat thermometers, you can determine the desired temperature in advance. If the temperature is reached or exceeded, the thermometer emits sounds or other signals.
What alternatives are there to digital thermometers?
You can buy an analogue thermometer for very little money. It will show you the temperature for a lifetime without you ever having to change batteries.
However, a digital thermometer can measure the temperature much more accurately and quickly. You can read the measured values very easily. In addition, a digital thermometer is usually able to display the air pressure, humidity and other information in addition to the temperature.
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