Conductivity To
TDS Conversion Factors
1. Factor - the conductivity to
ppm TDS conversion factor. Multiply conductivity by this factor to get
ppm TDS for the type of TDS reading needed.
2. 442 - a formulation that most
closely represents the conductivity to ppm relationship, on average,
for naturally occurring fresh water.
Factor = Actual TDS /
Actual Conductivity @ 25 oC.
Conductivity
at 25 oC |
TDS
KCl |
TDS
NaCl |
TDS
442 |
| ppm Value |
Factor |
ppm Value |
Factor |
ppm Value |
Factor |
| 84 µS |
40.38 |
0.5048 |
38.04 |
0.4755 |
50.50 |
0.6563 |
| 447 µS |
225.6 |
0.5047 |
215.5 |
0.4822 |
300.0 |
0.6712 |
| 1413 µS |
744.7 |
0.5270 |
702.1 |
0.4969 |
1000 |
0.7078 |
| 1500 µS |
757.1 |
0.5047 |
737.1 |
0.4914 |
1050 |
0.7000 |
| 8974 µS |
5101 |
0.5685 |
4487 |
0.5000 |
7608 |
0.8478 |
| 12,880 µS |
7447 |
0.5782 |
7230 |
0.5613 |
11,367 |
0.8825 |
| 15,000 µS |
8759 |
0.5839 |
8532 |
0.5688 |
13,455 |
0.8970 |
| 80 mS |
52,168 |
0.6521 |
48,384 |
0.6048 |
79,688 |
0.9961 |
Copyright © 1997 Eutech
Instruments Pte Ltd. marketing@eutechinst.com
|
