Fluke 971 temperature humidity meter fluke fluke 971 the fluke 971 measures temperature dew point or wet bulb from 20 deg c to 60 deg c and measures relative humidity from 5 percent to 95 percent plusmn 2 5 percent rh its 99 point data storage capacity means users can take multiple readings and store them for later analysis the fluke 971 temperature humidity meter features a liquid crystal display with backlight and a low battery indicator the unit operates on four aaa alkaline batteri