Uncertainty in ammonia flux measurement systems Conference Paper uri icon


  • Uncertainty analysis was performed on an ammonia sampling and analyzing system by using the first order Taylor series techniques. The system included analyzers, mass flow controllers, calibration gases, and analog outputs. The uncertainty was found to be 9.4% when measuring a 40 ppm ammonia stream with a 50 ppm span. Uncertainty analysis was performed with a higher purity gas and a higher quality (lower uncertainty) flow meter to determine the reduction in uncertainty of the system. The uncertainty of the higher quality gas and flow meter were reduced to 8.3% at 40 ppm with a 50 ppm span. The overall uncertainty reduction comes however with increased costs due to instrumentation and quality control.

published proceedings

  • ASAE Annual International Meeting 2004

author list (cited authors)

  • Boriack, C. N., Capareda, S. C., Lacey, R. E., Mutlu, A., Mukhtar, S., Shaw, B. W., & Parnell, C. B.

complete list of authors

  • Boriack, CN||Capareda, SC||Lacey, RE||Mutlu, A||Mukhtar, S||Shaw, BW||Parnell, CB

publication date

  • December 2004