Do you have a unique data collection requirement?  Are you looking for non-DJI drones? We have been designing and building custom aircraft with electronic flight stabilization since 1989 and using Ardupilot since 2010. Our designs are constantly evolving to take advantage of new technology, materials and sensors. We design safe, simple, reliable, lightweight, and cost effective UAS solutions.

5 Liter spray drone system
Automatic Winch System on DJI Matrice 300
Leaflet dispenser on DJI Mavic