The most sophisticated spray controllers are doing much more than assuring accurate application rates. They're keeping records, letting you tie to GPS technology for variable-rate applications, and controlling applications of two or more products at the same time. For this article, we are featuring the most sophisticated units from the leading suppliers. Most of them are targeted for custom applicators as well as large farmers.
More basic controllers are still available, of course.
That simply means that you can expand and update the unit to take advantage of changes in precision-farming technology, without starting from scratch. The Raven can be updated by replacing a computer chip. It can be updated via a laptop computer. The Raven will handle five different products while the Mid-Tech will handle six injection pumps. The Micro-Trak is user expandable for up to four injection pumps.