Spinning droplet impingers – spinners for short – help us determine if our treatments hit our target at the intended rate. These devices rapidly rotate teflon coated microscope slides, collecting any insecticide droplets in the vicinity. Back in the lab, we can use a microscope to determine if droplets from our treatment (marked with an invisible dye) were collected, and measure their density and size.

We have two different designs – one with larger slides, and one with smaller slides and a timer – but you might see either of them over night in your neighborhood if you are slated for a treatment.