442 Natural Water™ Standard Solution is used in calibrating many Myron L Instruments. It is the best choice when measuring boiler and cooling water samples, city water supply, lakes, wells, etc. "442" refers to the combination of salts mixed with deionized water to comprise this standard: 40% sodium sulfate, 40% sodium bicarbonate, 20% sodium chloride.
NaCl Standard Solution is offered to calibrate instruments that measure any sample that is predominately NaCl (sodium chloride), such as sea water, brackish water, etc.
KCl Standard Solution is used to calibrate conductivity instruments that read directly in microsiemens (micromhos) or millisiemens (1000 microsiemens). KCl (potassium chloride) is a very stable salt and is an international calibration standard for conductivity measurement.
pH Buffer Solutions 4, 7 and 10 are mold inhibited and accurate to within + 0.01 pH units @ 25°C. Myron L Buffers are traceable to NIST certified pH references and are color-coded for instant identification.