De-Fly turns a standard 12 volt spot sprayer into a walk-through applicator. Each animal receives one measured dose of spray as it passes through an opening on its normal trip to water or mineral. No gathering, no chute work, no internet required.
Buy the kit, $399How it worksTwo photo eyes detect each animal entering from either direction. The controller runs the pump for a set time and will not spray again until the opening is clear. An animal that stops in the opening is limited to the maximum spray time.
Runs any 12 volt diaphragm pump and any nozzle bodies. A 25 gallon 12 volt spot sprayer package covers the tank, pump and hose. The rest is standard farm store inventory.
A 12 volt battery with a solar maintainer runs it indefinitely. The controller broadcasts its own WiFi network; settings, test spray and head count are handled from a phone browser with no app and no cell service.
Every nozzle mount carries the same slot for the TeeJet 3/8 in nozzle body, and every Straight mount comes in a Sensor version with a 3/4 in hole for the photo eye. Clamps for round pipe, square tube, T-posts, round or wood posts, and flat steel.

1-5/8 to 2-7/8 in pipe, tube gates, panels

Standard 1.25 and 1.33 lb studded T-posts

Any round post, wood posts, odd pipe
Nozzle and sensor mounts are sold separately so you can match them to your gates and posts. The customer supplies the spot sprayer, nozzles, battery and solar maintainer; the buy list shows what to get and where.
$399
Controller, two photo eyes with reflectors, documentation. Ships from Texas.
Buy nowNo. The two eyes act as one detector. An animal breaks the near eye, receives one spray, and passing the far eye on the way out does nothing because the controller does not reset until the opening has been empty for the re-arm time.
No. The controller creates its own WiFi network that a phone connects to directly at the opening.
There is no limit. Cattle walking through in single file each trip the beam and each receive their own dose.
About 1.5 amp hours per day for the controller plus a small amount each time the pump runs. A 12 volt deep cycle battery with a 10 to 20 watt solar panel runs it indefinitely.
Any insecticide labeled for use on beef cattle, mixed and applied according to the product label. Water-based and oil-based livestock sprays both work with a standard diaphragm pump.