Meter Conductivity
To determine the conductivity to TDS conversion factor for your solution:
Appendix
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.
3. TDS Your Material—These columns are for you to write in your application-specific conductivity-to-ppm values and conversion factors for future reference.
Factor = actual TDS ÷ Actual Conductivity @ 25°C lists some commonly used conversion factors.
Conductivity | TDS KCl | TDS NaCl | TDS 442 | TDS Your Material | ||||
ppm Value | Factor | ppm Value | Factor | ppm Value | Factor | ppm Value | Factor | |
1413 μS | 744.7 | 0.5270 | 702.1 | 0.4969 | 1000 | 0.7078 | ||
12880 μS | 7447 | 0.5782 | 7230 | 0.5613 | 11,367 | 0.8825 | ||
HOLD/SET，when in the Measurement Mode, it acts as HOLD function.
When in the Setting Mode, it acts as Confirmation or Selection function.
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