Established in 1985, DGH is an industry-leading manufacturer of data acquisition hardware for use in the process monitoring and control marketplace. Our products have been used worldwide in such industries as water & wastewater management, pharmaceutical, scientific laboratories, military, automotive, transportation, energy management, and power utilities.As part of Jewell Instruments, LLC, DGH Corporation continues to innovate with a full range of Analog Input Modules, Analog Output Modules, Digital Input/Output modules, and Application Software. Programs.