That would be fantastic!! Is it still available?

Oh wow. Okay thanks. Anyone else out there have better news? Thanks, Hawkbox.

Hi there, I have an RHB 0-80 analogue refractometer that does not want to calibrate today. I've looked for tips elsewhere online, but the calibration steps aren't solving my problem. When I put a few drops of distilled water on the plate and point towards the sun, there is no null line: instead...