OldG
Elite Hobbyist
These are the conversions for the various metrics used to measure Total Disolved Solids or EC. It is why often you wonder how on earth nutes could be pushed to 1600 TDS but your pen is in 500 (1100 roughly on the 500 TDS scale).
EC | 500 scale (Hanna) | 700 scale |
0.1 | 50 | 70 |
0.2 | 100 | 140 |
0.3 | 150 | 210 |
0.4 | 200 | 280 |
0.5 | 250 | 350 |
0.6 | 300 | 420 |
0.7 | 350 | 490 |
0.8 | 400 | 560 |
0.9 | 450 | 630 |
1 | 500 | 700 |
1.1 | 550 | 770 |
1.2 | 600 | 840 |
1.3 | 650 | 910 |
1.4 | 700 | 980 |
1.5 | 750 | 1050 |
1.6 | 800 | 1120 |
1.7 | 850 | 1190 |
1.8 | 900 | 1260 |
1.9 | 950 | 1330 |
2 | 1000 | 1400 |
2.1 | 1050 | 1470 |
2.2 | 1100 | 1540 |
2.3 | 1150 | 1610 |
2.4 | 1200 | 1680 |
2.5 | 1250 | 1750 |
2.6 | 1300 | 1820 |
2.7 | 1350 | 1890 |
2.8 | 1400 | 1960 |
2.9 | 1450 | 2030 |
3 | 1500 | 2100 |