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Standard Solution
442™: Your PoolMeter™ has been factory calibrated with the TDS 442 Standard Solution. The 442 Standard Solutions consist of the following salt ratios: 40% sodium sulfate, 40% sodium bicarbonate, and 20% sodium chloride. This salt ratio has conductivity characteristics closely matching natural waters and was developed by the MyronL Company over four decades ago.
Sodium Chloride: For every ppm 442 Standard Solution, there is a ppm sodium chloride (NaCl) solution which will have the same conductivity. The parts per million of the equivalent NaCl solution is on each Standard Solution label. Instruments calibrated to NaCl standards are set using equivalent NaCl values.
All MyronL Company Standard Solutions are traceable to the National Institute of Standards and Technology (NIST) and are within 1.00% of reference solutions. The concentrations of the reference solutions are calculated from data in the International Critical Tables, Vol. 6.
All MyronL conductivity Standard Solution bottle labels show three values: ppm 442, ppm sodium chloride, and conductivity in micromhos.
RECOMMENDED STANDARD SOLUTION ppm 442™ and ppm NaCl
442-3000*
442-30,000 (when used with RE-10)*
* Specify quart (Q), gallon (G) or 2 oz. (2OZ).
Ex. 442-3000Q
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