Horiba LAQUAtwin NO3-11 Meter
The only pocket meter that directly measures nitrate ion and nitrate-nitrogen concentrations in 0.3ml sample (or 0.05ml sample with sampling sheet B). Unique sensor allows measurement of viscous liquids, solids, and even powder samples. No need for a beaker to calibrate your meter or measure a sample. Just place a few drops of the standard or sample onto the flat sensor. This procedure saves you time and prevents wasting your precious sample. Note: For soil sampling, the 30 ppm and 300 ppm calibration solutions are required. For crops, the 300 ppm and 5000 ppm calibration solutions are required.