Hello,I am creating aabout water treatment and I would like to sell a precision scale dedicated to the measurement of TSS.I need an accuracy of 0.001g.Could you clarify that for me, please?- The model you recommend- the selling price- shipping time- the warranty- the minimum weight- Calibration conditions? (a regulatory calibration is required every year in the laboratory).- Is the equipment available in 220V 50 Hz AND 110 v 60 Hz?Do you agree todropshiping?BR Show More