Rain gauge comparison 2018

Purchase advice for rain gauge comparison or test 2018

  • A rain or rain gauge is used to determine the amount of rainfall that has fallen over a given period of time and is an important tool for meteorologists, farmers and gardeners.
  • The more complex the structure of the rain gauge, the more accurate is the measurement in general. While professional meteorologists usually rely on digital measuring instruments, hobby gardeners also need simple analog rain gauges.
  • In addition to the amount of rainwater, many rain gauge can also determine the fallen amount of snow, hail or sleet.

Rain gauge comparison 2018: gauge

Germany is not known for good weather with lots of sunshine. According to Eurostat statistics on the European cities with the most rainy days, there were a total of 266 rainy days in 2004 in the city of Halle an der Saale. With this number she was still ahead of English and Irish cities, which are well known for their rainy weather. But even if the uncomfortable weather can not be influenced: analyzing it and predicting it is enormously important. Not only scientists and climate researchers are interested in the precipitation, but also (hobby) gardeners and farmers.

Rain meters - also known as ombrometers - provide surprisingly accurate information, because they show how much rainwater has fallen in a given period of time. This makes it possible to draw conclusions about dry periods and wet periods. In our rain gauge Comparison 2018, we have taken different types and models of rain gauge under the microscope and betrayed you u.a. where you can best set up your meter, which materials are most suitable, and for whom the purchase of analogue and digital rain gauges is worthwhile.

  • to our comparison of anemometers
  • to our comparison of weather stations
  • to our comparison of moisture meters

1. Rain Gauges provide valuable information for gardening and farming

Rain gauge comparison 2018: 2018

With an analog or electric rain gauge, the precipitation can be measured.

Rainfall measurement equipment has been around for several centuries. Today the most used by weather researchers rain gauge goes back to a development of the Prussian meteorologist Gustav Hellmann from 1886. This stock consists of a collecting device made of sheet metal or steel with an integrated collection container in which the fallen rainwater is collected and the amount is read off a scale. This simple structure is also based on our modern rain gauge.

Modern rain measurement

Rain gauge comparison 2018: 2018

Some state-of-the-art precipitation gauges can now measure the amount of water by means of ultrasound. Here, the amount of rainfall is measured by the size and number of raindrops. In addition, there are also devices that weigh the raindrops with sensitive technology.

In contrast to a rain sensor, which only displays the probability of precipitation and thus provides a weather forecast, a rain gauge can be used to measure the amount of precipitation that has fallen, in order to draw valuable conclusions. For example, if you have a garden, you know with a rain gauge at any time when you need to water your garden.

The same applies to agriculture. Again, the information of a rain gauge helps to create accurate sowing and harvest plans. In addition, with a rain gauge also extensive observations regarding the precipitation development can be seen in our latitudes,on the basis of which, in turn, long-term trends in climate development can be identified.

Last but not least, there are rain gauges in a chic design that can beautify and enhance many a garden. Thus, this technical tool not only provides interesting weather information, but also offers itself as an accessory for the local green.

2. Different categories of rain knives

By principle, any kind of rain gauge works similarly. They all collect water for a certain period of time and then determine the exact amount of water. In their construction, however, there are some significant differences, which we would like to present briefly below:

Typedescription
Analog rain gauge

Rain gauge comparison 2018: rain

This rain gauge is located in a holding device with a collecting vessel and a collecting container, which is provided with a measuring scale. The best rain gauges are funnel-shaped. Here, the collected rainwater is well protected against evaporation, while it can easily escape in open and cylindrical vessels. After the downpour, you can read directly how much precipitation has fallen.
Digital rain gauge

Rain gauge comparison 2018: comparison

A digital rain gauge consists of an outdoor sensor and a digital station that can receive radio signals from the sensor.

The sensor contains a bowl, in which water collects and which works similar to a rocker. If a certain amount of rainwater has collected, the shell tilts and empties into a container. Based on the number of tipping operations, the amount of water is then calculated. These data are then sent by radio to the receiving station and can be conveniently read from the display.

The wireless rain gauge empties itself independently and can - depending on the device type - even generate weather statistics based on the precipitation data.

Weather station

Rain gauge comparison 2018: gauge

A professional weather station with rain gauge works in principle like a radio rain gauge. Here, however, there is the difference that many more measurements can be made. So you can measure with a weather station in addition to the fallen rainfall in millimeters and the temperature, air pressure, rain probability and wind strength.

Which precipitation gauge is suitable for you depends on what you primarily want to use it for. For example, if you need a very precise indication of the run-down rainfall, it is worth buying a more expensive digital rain gauge. However, if you are given an approximate quantity and consider the rain gauge in the garden more than a nice visual and informative extra, then your choice should fall on an analog rain gauge.

Here again summarized the Advantages and disadvantages of an analogue rain gauge to a digital rain gauge:

  • very easy operation
  • available in many designs
  • significantly cheaper
  • does not consume electricity
  • provides less accurate readings
  • does not empty itself independently
  • Can not create weather statistics

3. Our purchase advice: How to find your rain gauge test winner

3.1. Robust material

Rain gauge comparison 2018: comparison

With a device like the rain gauge from Neatmo or TFA Dostmann you can measure the amount of rainfall in your garden.

Most analog rainwater meters are made of stainless steel, glass, zinc or plastic. The latter material is usually used in very cheap rain knives and is less resistant than other materials. So a plastic rain gauge can be easily cracked in very cold temperatures and strong weather conditions (such as in intense sunlight). In addition, rain gauge made of glass and plastic are also not suitable for use in winterbecause they can shatter quickly. Therefore, we advise you in case of doubt rather on rain gauge made of stainless steel or zinc, so that you can prepare the meter as long as possible joy.

3.2. Accuracy of the measured values

Rain gauge comparison 2018: rain

Rain gauges often have a striking design. Here disguises a rain gauge as a flower pot with figure.

In terms of measurement accuracy, the digital devices have a clear advantage. This is partly because a computer instead of the human eye makes the measurement. On the other hand, in the digital measurement usually only a smaller amount of water is lost through evaporation. But even good analog devices can guarantee this. For this you should pay particular attention to the shape and construction of the rain gauge.The device should be funnel-shaped and protect the collected water as well as possible from evaporation and wind. Although a 100% accurate measurement is not possible with any device, this is the only way to ensure that you get the most accurate measurement results possible.

3.3. measurand

The bigger the rain gauge, the more water you can catch in it. The standard collection area is 200 cm², but there are also smaller variants with 100 cm² and larger ones with 500 cm². However, the latter are mainly used in the mountains, where it often rains heavily and the rain gauge must be above average in order to catch large amounts of rainwater can. Smaller analog rain gauges have the disadvantage that you usually also have a small collection container that needs to be constantly emptied manually, especially in the rainy season.

3.4. design

Rain gauge comparison 2018: comparison

Weather station with wind and rain gauge: Wireless weather stations are also available including garden thermometer, anemometer and rain gauge app.

If you want to buy a rain gauge, which you primarily want to use as an original piece of jewelry for your garden, then you have the choice of the right design of choice. Manufacturers of various brands offer the practical measuring device in combination with decorative figures for the garden. Often, however, you have to compromise on functionality, as in case of doubt, a pretty design takes precedence over a well-functioning rain gauge.

4. Questions & answers about the rain gauge

4.1. Where do I put the rain gauge on?

A rain gauge should be placed at a height of about one meter. You should make sure that the meter is as free as possible. Therefore, setting up on the balcony or terrace is rather less, since the measurement result is falsified by the house wall and no laterally incident rain can be collected.

However, the rain gauge should not stand completely unprotected. Otherwise, the device may be damaged in strong winds.

Tip: If possible, place the rain gauge near a hedge. So he is optimally protected. In order not to falsify the measurement result, you should keep a distance of at least one meter to the hedge.

4.2. Can I build a rain gauge myself?

You can make a very simple rain gauge yourself. All you need is a plastic bottle, funnel, and setup device. The bottle is scaled and the funnel then inserted into the neck of the bottle and fixed. So you can easily and quickly read the amount of collected rainwater after a downpour.

4.3. How accurate are rain meters?

As simple as the principle of a rain gauge may be, it is difficult to obtain the most accurate measurement results possible with it. This is due to the fact that the device is very susceptible to errors due to evaporation, wind and mostly unsuitable and non-representative locations.

Depending on the rain gauge and location, you will have to expect deviations of 10 to 20%.

4.4. How do I measure the amount of snow with a rain gauge?

Some rain gauges have a frost-proof container and an integrated heater, which brings the snow directly to melt. Still other models have a device for snowfall that protects against snow whirling. If the measuring scale is fine enough, you can also read the amount of snow in the rain gauge with such devices.

4.5. Is there a rain gauge test from Stiftung Warentest?

No, unfortunately, the testing institute had so far neither weather stations nor rain gauge in the test. However, she tested in the issue 06/2013 different weather apps. While many did rather poorly due to inaccuracies in the prediction, the Stiftung Warentest recommends apps with precipitation radar. These can show pretty well where it will rain in a nearer period of time and you can, for example, to warn about walks against unpleasant showers.

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Video Board: 19 April 2018 Rainfall Data Analysis and Satellite Based Rainfall Retrieval