This device is designed to count and measure the diameter of particles emitted from a crop sprayer nozzle. The number and size of the drops determines how effectively the sprayed chemicals cover the crop and how much spray chemical drifts away from the target. The three main influences on the drop size spectrum are the design of the nozzle, the exit velocity of the spray and the physical properties of the spray. The spectrum of drop sizes in any given spray is measured at present by one of three methods: Petri Dishes containing an oil or water sensitive paper, light diffraction and optical methods. The first being very tedious and time consuming, the other two unsuitable for use outside the laboratory. The aim of the device is to provide an accurate, simple means of measuring the drop size spectrum of pesticide spray in both laboratory and real operating conditions.

Wireless mobile device for counting and measuring spray droplets

248th National Meeting (2014)

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