TEMPERATURE MEASURING DEVICES; AMBIENT AIR AND WATER. 4-203.12

A. Ambient air and water temperature measuring devices that are scaled in Celsius or dually scaled in Celsius and Fahrenheit must be designed to be easily readable and accurate to plus or minus 1.5 degrees C in the intended range of use. P2 B. Ambient air and water temperature measuring devices that are scaled only in Fahrenheit must be accurate to plus or minus 3 degrees F in the intended range of use. P2