目录:上海铂勒机电设备有限公司>>水质分析仪器>>pH/ORP计测定仪>> 147011
Most natural waters range from pH 4 to pH 9, but commonly are above pH 7 because of carbonates and bicarbonates (alkalinity). The pH of water used in industry, boiler feed water, and swimming pools usually is kept within a narrow range. Simply add indicator to the sample and compare the color to the spots on the color disc to measure pH.