This dial thermometer is accurate and easy to read.  Besides temperature, it also has a hygrometer that measures the moisture content of the air to determine the relative humidity.  The mechanical hygrometers take advantage of a time-tested method in which a synthetic fiber expands as it absorbs moisture from the air.  This expansion, in turn, moves the metal coil to which it is bonded.  As the coil twists, the pointer moves up the scale.  As the fiber dries, the coil contracts and the pointer reverses direction.  Relative humidity ranging from 45% to 70% is generally considered to be comfortable.  The casing is solid brass, never any peeling, flaking or rusting.  This weather station is made in the USA and the manufacturer gives it a lifetime guarantee.  This stands 5.75" high, the face is 4.24" in diameter.