sentences:  In practice, the error can be as high as 25 percent.The color indicator tubes are well suited for infrequent, rough estimations of moisture in natural gas; for example, if the tube indicates 30 pounds of water, there is a high degree of certainty that it is over 10 pounds.This type of device is considered to be the "gold standard" when it comes to measuring the dew point of water in gaseous media.