Task At Hand – In a previous blog I declared that I am not a fan of the aluminum foil test for evaluating ultrasonic performance. I question its validity and relevance on a number of fronts. If my purpose here is to question my own skepticism, then I guess I should probably define the factors … Continued
I just spent a couple of hours re-reading several of the ISO specifications related to “Millipore” testing including ISO16232-3 and -7. I put the word Millipore in quotes here because although these are normally called Millipore specifications, none of them mentions the word Millipore. (Millipore happens to be the name of a company that developed … Continued
After three + months of sheltering in place, things are slowly returning to the “new normal” here in New York state which is where I write this blog. We all know all too well what’s been going on around the world over the past several months so I’m not going to belabor those details here. … Continued
Until recently, I was only able to theorize about the mechanism involved in the perforation of aluminum foil by ultrasonic cavitation. I no longer have to theorize! My theory had always been that perforation of aluminum foil was due to the repeated flexing of aluminum foil as cavitation implosions occurring on opposite sides of the foil … Continued
If you’ve heard of ultrasonic cleaning you’ve probably heard of the aluminum foil test. The practice of putting a piece of aluminum foil into an ultrasonically activated tank of water probably began as a novelty demonstration. The holes produced in the aluminum foil by the collapse of cavitation bubbles at least showed that something interesting … Continued
It was in 1962 during my junior year in high school when my chemistry teacher, Mr. McBain, described an unusual phenomenon related to a specific element. At the time, I think it was more intended as a test question to see who had studied their notes. I recently witnessed this phenomenon for the first … Continued
Liquid level sensors are used to indicate liquid level by sensing the presence of a liquid using several different means. The “float” type sensor is the one that probably comes to mind first for most of us. The float valve in a toilet tank is a prime example. In the case of the toilet, a … Continued
Technological advancement in parts cleaning equipment can be seen in the newest generation of cleaning systems from Ransohoff and Blackstone-NEY Ultrasonics.
Using the right amount of chemistry is important to successful industrial cleaning. Since there is no standard convention for expressing the amount of chemistry to use, it sometimes takes a little effort to sort things out. Chemistry is supplied in either liquid or powder form with several different conventions for each. Let’s look at liquids … Continued
Although the importance of “degassing” liquids prior to their use in an ultrasonic cleaning or rinsing process is pretty much common knowledge, the source of the gas and details of how to remove it are less well known. This blog is the beginning of a series which will describe in some detail where that gas comes … Continued
