Royal Belgian Meteorological Institute proves "The New Standard in Air Temperature Measurement is the BARANI helical MeteoShield"

Barani MeteoShield Pro looking over a Stevenson screen meteorological shelter

Following a long-term study by the Royal Belgian Meteorological Institute the results of the performance of the patented design of the MeteoShield Pro, on which the MeteoHelix IoT Pro micro weather stations are based, were finally published at on October 08, 2018 at the CIMO-TECO-METEOREX - WMO as part of the Meteorological Technology World Expo 2018.

Under the skeptic eye of the Royal Belgian Meteorological Institute, two units of the MeteoShield Professional were paired against two fan-ventilated atmospheric air temperature measurement systems used as the ultimate atmospheric air temperature references.

The results should have been predictable

Until the introduction of the helical (spiral or twister type) radiation shield by BARANI DESIGN Technologies, the results of radiation shield testing were mostly predictable. Fan-ventilated (fan-aspirated) shields that use an electric fan to drive air around a temperature sensor typically surpassed the accuracy of naturally ventilated multi-plate shields or Stevenson screens by 0.5°C or even by up to 3°C. Some of the most reputable air temperature sensor companies and their customers placed $300-$1500 precision sensors into expensive poorly performing shields only to end up with mediocre accuracy for a large financial investment. Affordable Davis Vantage Pro weather stations were many times able to surpass the accuracy and reliability of professional weather stations at 1/10th the cost. This was the status quo.


While many Met offices still cling to the old style Stevenson screen shelters for their reference measurements, a new era of precision atmospheric measurement may be upon us. While Stevenson created his shelter to perfection with the technologies at hand, new technologies of the 21st century allowed Jan Barani, educated at Rensselaer Polytechnic Institute (RPI) in aeronautical engineering, to create something not only more precise but arguably beautiful. Fan ventilation upgrades to the Stevenson screen design kept pace with modern fan-ventilated solar shields and screens until the introduction of the helical radiation shield design by BARANI DESIGN Technologies.

MeteoShield Pro - the new standard of atmospheric temperature measurement

Quoting the results of the Royal Belgian Meteorological Institute study, the standard deviation error of the patented helical shield design of MeteoShield Professional is 1/2 of their fan-ventilated shield which in layman’s terms means the helical MeteoShield Pro is twice as accurate. Whats more, the standard deviation of the MeteoShield Pro is 18% lower than their fan-aspirated Stevenson screen. Once again in layman’s terms we can say that the helical MeteoShield Pro is 18% more accurate than a fan aspirated Stevenson screen. If that was not enough, the helical MeteoShield’s precision in rainy conditions is almost twice as good as that of the fan-aspirated Stevenson screen reference and almost four times better than the RMI fan-ventilated shield.

Stable platform for climatological measurement

Climatology has a special set of requirements for monitoring global warming. Temperature minimums and maximums are not the most relevant values, actually they are only good for publicity. Average yearly temperatures are also only part of the picture. A detailed statistical analysis encompassing such terms as Standard Deviation, Skewness, Kurtosis, 1st Quartile, Median and 3rd Quartile in addition to the Minimums and Maximums need to be considered together. Effects of rain and snow, snow on the ground and the effects of ground color and ground type around the radiation shield or Stevenson screen are also important to consider. Taking all these variables and statistical terms into consideration, “MeteoShield Professional is really the only measurement platform that comes even close to fulfilling all the requirements. It is not perfect, but comes closest to finally being able quantify with confidence, the very slow (0.7°C per 100 years) climatic changes, which up till now, were stuck in measurement noise.

Is Barani better than Stevenson?

  • “The Barani's shelters have shown excellent results with a very limited heating under strong radiation. The mean overheating is as low as 0.2°C for medium global solar radiation and low wind speed (<1m/s). It is unclear why the overheating is lower for higher global solar radiation.”

  • “Despite the fact that the Barani shelters are not arti cially ventilated, their performances are better than our arti cially ventilated compact shelter.”

Quoted from the Intercomparison of Shelters in the RMI AWS Network, Luis Gonzaalez Sotelino, Nicolas De Coster, Peter Beirinckx, Pieter Peeters, Royal Meteorological Institute of Belgium, 3 avenue Circulaire 1180 Uccle, Belgium

New product launch preview for the Meteorological Technology World Expo in October 2018

The 2018 show will launch MeteoWind Compact anemometer, ezMETAR weather stations and MeteoHelix research-grade micro-weather stations based on the award-winning helical MeteoShield Pro design.

The inventor of the helical radiation shield will be presenting and explaining the principles behind this innovative helical weather station. After over 12 years of research and 10 years of field experience, MeteoHelix weather stations based on the patented design of the helical solar shield, allow previously difficult-to-achieve measurement accuracy, precision and reliability in an economical all-in-one weather station. These solar powered and wireless all-in-one weather stations are able to remain operational for 6+ months without sunlight and can use satellite data uplinks for meteorological data with satellite LoRaWAN gateways.

BARANI DESIGN Technologies will be exhibiting the helical MeteoShield Professional, MeteoHelix and professional AWOS weather stations in booth 10005 at the Meteorological Technology World Expo on 09-11 October 2018 in Hall 8, Amsterdam RAI, in the Netherlands.


Monsanto in Europe begins evaluation testing of MeteoHelix IoT Pro in field experiments as part of SkyMaps’ agro solutions

 MeteoHelix Pro weather station in agricultural field experiments

MeteoHelix Pro weather station in agricultural field experiments

MeteoHelix IoT Pro micro weather stations designed to achieve strict accuracies as set by the World Meteorological Organization (WMO) have been deployed to crop field experiments throughout Europe by Monsanto as part of Skymaps s.r.o. precision agricultural solution. The precise measurement properties resulting from their helical, spiral or twister design makes these wireless weather stations unique in the marketplace.

Recent advancements in wireless technologies enabled BARANI DESIGN Technologies to design a complete wireless weather station into a cavity where only a sensor could fit before. This new helical weather station design is not only accurate and compact, but also economical. With the target MSRP end-user price set at 499 Euro (VAT exclusive) or $550 USD, the measurement quality and installation convenience offered can be considered a steal. For precision agriculture experiments where accurate climate monitoring is of utmost importance, the long-term measurement stability offered by the self-cleaning MeteoHelix IoT weather stations is a strong selling point, along with their ease of use, installation and operation.

The MeteoHelix IoT Pro is not the only meteorological measurement technology being evaluated by Monsanto. Understory weather stations have been in evaluation for some time. MeteoHelix IoT Pro is however the most accurate, theft proof, vandalism proof weather station on the market today.