You are dealing with two very different densities and it is impossible for
one hydrometer to measure both.  A mead hydrometer requires a range from
0.990 to 1.120.  This is spread along several inches of scale.  A honey
hydrometer (mine anyway) is scaled from 1.350 to 1.450.  This covers honey
ranging from impossibly watery to very dense.  A mead hydrometer would not
start to sink in honey.I suppose one could weight it with  a number of
metal washers sitting on the bulb to make it sink.  You would then need to
graduate a new scale using a real honey hydrometer or refractometer in a
wide range of made up  honeys from weak to dense.
                                        Sid P.