jan 1, 1936 - The Beckman pH meter is released
Description:
The meter was produced in order to find a better way to measure the pH of solutions. Beckman fit all of the needed instrumentation in a nice small box.https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/beckman.html
Added to timeline:
Date:
jan 1, 1936
Now
~ 89 years ago