Are you not yet sure exactly which microscope or refractometer you need?
These Checklists will help you!
Practical microscope application matrix
Which microscope is the right one to use in typical biological, metallurgical applications, typical polarisation or stereo microscope applications
“My ideal microscope”
Practical checklist which you can use to quickly find the right microscope by using filters for the relevant objectives, magnifications, field of view, grinding for the lenses and much more
“My ideal refractometer”
Practical checklist which you can use to quickly find the right refractometer