Depending on how you want to approach this and how well your bench spare parts collection is you might consider a DIY meter.
I made one using the Allegro 1302 Hall effect sensor and a Motorola LP2951 voltage regulator.
Very inexpensive and quick to build. Almost rivals my lab unit for accuracy too.
I use it to measure ion pumps magnets. It will also detect the earth magnetic field well.
I mounted the Hall sensor at the end of a plastic straw with some heat shrink over. The readout is a voltage on my DMM.