Kray Technologies

Kray Technologies builds Kray Protection, an unmanned drone that sprays fertilizer and pesticide on crop fields. The site says the drone is the first fully unmanned digital crop sprayer of its kind. It delivers products to farm fields on demand. The site does not state where the company is based.

The drone is built to replace crop spraying aircraft. The site says it can process up to 1,200 acres per day. Its top speed is 70 mph, and its typical working speed is 56 mph. The site gives an application rate of 0.6 to 4.5 pounds per acre. It says the drone can work with the EPA application safety rules.

The site lists the drone's main specifications. The maximum take-off weight is 94 pounds (42 kg). The chemical tank can carry 33 pounds (15 kg). The application strip is 16.4 feet (5 m) wide. A datasheet can be downloaded from the site.

The drone flies in a fully automatic mode. It uses a computer vision system to change its path with the terrain. It also avoids obstacles in its way. The site says up to 85 percent of the drone's time is productive. Only 15 percent goes to tank refills and battery charges.

The company says the drone uses less fuel and needs less maintenance. It says fewer staff are needed to run it. The site claims that the cost of spraying falls to one tenth of the usual cost or less.

The site describes a method called 5D precision spraying. The method combines the spatial placement of fertilizer with the right amount of pesticide and the right timing of the spray. The site says these factors together improve the precision of fertilizing.

The company offers partnership projects for industry players. A business can order one or two drones to run a pilot project. The site lists three groups for these projects: chemists, pesticide operators and farmers. Each group has a page that explains the benefits for its work. The site has a contact form for questions and comments. It also has a video library that shows how the drone works. Links to Facebook, LinkedIn and YouTube pages are on the site. The site lists sections for history, team, publications, products, news and a gallery.