Reading the temperature is very easy. If one crystal is highlighted in green that is the temperature. If two adjoining crystals are highlighted in blue and tan it is the temperature in between. Some internet photos and links may still show the old item, we are now shipping the new more accurate V2.0 Fermometer with a range of 44 degrees to 86 degrees. The moved the scale 8 degrees to the right to accommodate Belgian Ales and Moonshiners!