About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

airself
Thermohygrometer

The airself thermohygrometer is a compact and precise device for monitoring indoor climate conditions, which measures both temperature and humidity and thus provides valuable information for creating a healthy living environment. The intuitive operation and clear readability of the thermohygrometer display make it easy to use.
The colour-coded comfort zones allow an immediate assessment of the humidity level and are therefore useful for preventing mould growth and creating ideal conditions for plants, pets or specific rooms such as bedrooms and living rooms. The airself thermohygrometer is also non-battery operated and therefore ready for immediate use, making it a practical solution for the home. Due to its modern and unobtrusive design, it integrates seamlessly into any environment. Overall, this thermohygrometer offers excellent value for money and is a worthwhile purchase for anyone who values a healthy and comfortable indoor climate.

  • Without batteries and therefore immediately ready for use
  • Easy handling
  • Good optics
  • For indoor use only

The first impression

Packaging and contents

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

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Product protection

Carton is sturdy, product sufficiently protected

100

Points

Sustainability Packaging

Unnecessary packaging waste has been avoided, the plastic film protects the product components

80

Points

Package contents & scope

Complete

100

Points

Instructions for use

Product is self-explanatory

100

Points

TOTAL

95

Points

Weighting: 20%
*Themaximum score is 100 points

The packaging of the airself thermohygrometer is characterised by its simple elegance and functionality. It is compact and attractively designed, with clear illustrations and concise information on the main functions of the device. When opening the packaging, the careful arrangement of the contents immediately catches the eye. The thermohygrometer itself is securely and firmly fixed in a protective plastic mould to prevent damage during transport. In addition to the device, the packaging contains an easy-to-understand instruction manual that explains step by step how to install and use the thermohygrometer. One positive aspect to emphasise is that no batteries are required, which means that the device can be put into operation immediately. To summarise, the first impression of the airself thermohygrometer conveys a feeling of quality and user-friendliness that meets the expectations of a modern and reliable indoor climate measuring device.

The first time in your hand

Product processing and appearance

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

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Visual appearance

Attractive design

100

Points

Processing

Very good workmanship

100

Points

Stability

Very stable

100

Points

Sustainability of the product

No details, but use of high-quality materials

80

Points

TOTAL

95

Points

Weighting: 20%
*Themaximum score is 100 points

The airself thermohygrometer is characterised by first-class workmanship and an aesthetically pleasing design. As soon as you take it out of the packaging, it is clear that the device is made of robust materials, which indicates a long service life. The design of the thermohygrometer combines functionality and aesthetics in an elegant way. The dial is large, easy to read and has colour-coded comfort zones that make the current indoor climate values visible at a glance. Another highlight is the flexibility of the device’s installation. It can be hung up as well as set up, which allows for various applications in the home. Furthermore, the thermohygrometer is not dependent on an external power supply, which makes it particularly environmentally friendly and independent. A supporting brochure containing useful tips on preventing mould growth rounds off the positive overall picture.
To summarise, the airself thermohygrometer impresses with its excellent workmanship and sophisticated, appealing design. It is not only functional and durable, but also visually appealing and can be integrated into any room.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

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Comparison with a digital thermometer

Very low deviation

90

Points

Comparison with a digital hygrometer

Slight deviations

90

Points

Stability of the measured values over 24 hours

No fluctuations of more than 1°C and 2 % relative humidity

100

Points

Accuracy under different ambient conditions

Small deviations from the reference values

95

Points

Scale calibration with known reference values

Very good calibration

90

Points

TOTAL

93

Points

Weighting: 45%
*Themaximum score is 100 points

The thermohygrometer from airself largely lives up to the promises made by the manufacturer in its advertising. The high-quality workmanship and long durability of the thermohygrometer are easily recognisable and confirm the quality standards that airself sets for its products. The dial is large and easy to read, and the coloured comfort zones provide helpful visual support that enables quick and easy assessment of the indoor climate values.
The fact that the device does not require batteries and is therefore more environmentally friendly than other devices is in line with the manufacturer’s advertising claims. The mould alarm, which warns the user of critical humidity levels, is a useful feature that works reliably.
The device also impresses with its attractive design, which can be integrated into various interior styles and thus underpins the manufacturer’s aesthetic advertising claims. The device also comes with a brochure that provides useful tips on mould prevention and indoor climate control and therefore represents additional added value.
In summary, it can be said that the thermohygrometer from airself fulfils most of the advertising promises and is characterised by a well thought-out and user-friendly design. It fulfils expectations in terms of quality, design and functionality.

Test plan

You can find a detailed insight into the evaluation criteria of the practical part of the test and the distribution of points here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Price/performance ratio

and ratings from consumers

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

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Price / performance ratio

Very good performance in the lower price segment

90

Points

Rating cut

4.2 out of 5.0 on Amazon

60

Points

TOTAL

75

Points

Weighting: 15%
*Themaximum score is 100 points

On the Amazon platform, consumers rate the product with an average of 4.2 stars (key date: 21/01/2025). In individual cases, it is criticised for being too sluggish or imprecise . On the other hand, the elegant and functional design and the environmentally friendly operation are emphasised positively. In our practical test, we were able to confirm that the elegant and functional design of the thermohygrometeris well received by customers. However, the consumers’ criticism of the thermohygrometer‘s imprecise function was not justified.

Prices of up to €39.99 are charged on the Internet for equivalent products. Very cheap products are available from as little as €4.99 . The thermohygrometer from airself is therefore currently in the lower price segment with a price of €15.90. For the quality and performance received, the price-performance ratio is very good.

Overall result

1. packaging & contents

20%

95

Points

2. product processing & appearance

20%

95

Points

3. in the practical test

45%

93

Points

4. price/performance & consumer reviews

15%

75

Points

TOTAL

91

Points

*Themaximum score is 100 points

Thermohygrometer
 of the brand 
airself
achieved
91
Points in our test and therefore passed. The test was carried out in the test period
01/25
and is stored in our database under the licence number
241114001
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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