Scientific
New Member
It was really easy. Table salt in a lid or cap (I used the lid from an olive jar). Fill it almost to the top with salt. Add just enough distilled water to make a slurry, with no floating water above the salt. Put the lid and the hygrometer in a zip lock bag, making sure the sensor isn't blocked by the plastic. Seal and wait for the RH to stabilize (mine took about two hours). It should read 75%. Calibrate or make note accordingly.
Done!
Thanks ITS. Adding that to my notebook.