”On-site” means measuring Ammonium and Phosphate in the tank. The main advantage is that short sample paths give quick, undistorted results. This is the idea behind the new digital analyser generation from HACH LANGE—AMTAX sc and PHOSPHAX sc. The concept is a practical, logical extension of the proven AMTAX and PHOSPHAX series. It combines all the advantages: the high precision of an analyser and the simplicity of a probe.