The present invention provides a sprinkler with both a reversing part-circle mode and a non-reversing full-circle mode. The single crystalline dielectric layer can be patterned into various crystalline dielectric portions including dielectric fins, dielectric nanowires, and a dielectric fin-plate assembly. This single unit along with an electronic control unit and mass flow controllers provide a humidity-controlled system designed to control the atmosphere of TGA sample and reference chambers simultaneously.