Oakton, WD-00653-16, 84 uS Conductivity Standard Calibration Solution, 1 Pint All OAKTON Conductivity/TDS calibration solutions are cross checked using different test methods, premixed, and ready to use. OAKTON conductivity/TDS solution bottles are labeled with the name and CAS number for all ingredients to conform with "Right-to-Know" requirements, and includes an MSDS. Solutions come in one pint bottles.