Research Article
FPGA Based Single Chip Solution with 1-Wire Protocol for the Design of Smart Sensor Nodes
Table 1
pH readings taken from HQ40d meter and Atlas pH meter at different dilutions.
| Sample number | Amount of water (mL) | Amount of acidity (H2SO4) (mL) | Amount of alkalosis (NaOH) (mL) | HQ40d meter | Atlas pH meter |
| 1 | 100 | — | 5 of 0.1 M | 11.80 | 11.89 | 2 | 100 | — | 4 of 0.1 M | 11.69 | 11.72 | 3 | 100 | — | 3 of 0.1 M | 11.60 | 11.63 | 4 | 100 | — | 2 of 0.1 M | 11.40 | 11.43 | 5 | 100 | — | 1 of 0.1 M | 11.00 | 11.04 | 6 | 100 | — | 5 of 0.01 M | 10.54 | 10.58 | 7 | 100 | — | 4 of 0.01 M | 10.38 | 10.43 | 8 | 100 | — | 3 of 0.01 M | 10.28 | 10.35 | 9 | 100 | — | 2 of 0.01 M | 10.06 | 9.98 | 10 | 100 | — | 1 of 0.01 M | 9.37 | 9.32 | 11 | 100 | — | — | 6.85 | 6.92 | 12 | 100 | 1 of 0.01 M | — | 5.74 | 5.79 | 13 | 100 | 2 of 0.01 M | — | 4.02 | 3.93 | 14 | 100 | 3 of 0.01 M | — | 3.65 | 3.56 | 15 | 100 | 4 of 0.01 M | — | 3.48 | 3.41 | 16 | 100 | 5 of 0.01 M | — | 3.34 | 3.28 | 17 | 100 | 1 of 0.1 M | — | 2.85 | 2.80 | 18 | 100 | 2 of 0.1 M | — | 2.53 | 2.47 | 19 | 100 | 3 of 0.1 M | — | 2.41 | 2.37 | 20 | 100 | 4 of 0.1 M | — | 2.29 | 2.23 | 21 | 100 | 5 of 0.1 M | — | 2.20 | 2.14 |
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