I’ve been “playing” with ultrasonics for over two-thirds of my life now and am absolutely convinced that there is still more to know about the technology than anyone knows. The “fish tank” in the lab continues to reveal more questions than answers when it comes to this complex technology. The Ultrasonic Fish Tank in the Lab Still, … Continued
Today we are, again, going to bring ultrasonic sounds into the realm of human audibility by lowering the frequency to ones that most people with normal hearing can hear. Several preceding blogs have discussed the effects of varying the pulse width and pulse period of an ultrasonic generator in an ultrasonic cleaning system. If you’ve … Continued
Pressure regulating valves were discussed in the preceding blog Valves – Pressure Reducing Valves. Pressure reducing valves, although commonly used where pressure is an issue, are not always the best alternative. The pressure reducing valve has a close cousin called a “Back Pressure Regulating Valve” which monitors and controls pressure in a similar but different … Continued
It is not an uncommon practice to use flow restricting valves in an effort to reduce and/or control pressure in even the most sophisticated industrial cleaning machines. In the blog “Reducing Flow vs. Reducing Pressure – Which is it?” the risks of using flow restricting valves to control pressure were discussed in some detail. Reliable pressure control … Continued
There is always a temptation to use solvents in cleaning applications. Although it is a “no-brainer” that there is a risk of fire or explosion when using a flammable solvent, it won’t hurt to review what flammability is all about. You may be familiar with the “Combustion Triangle.” In simple terms, there are three things … Continued
Some means of reducing water hardness as we’ve described in preceding blogs is an almost universal first step in making water pure enough for most cleaning applications. But water softening only addresses the removal of only a few of many contaminants that are commonly present in our water supplies. The remaining contaminants range from ions … Continued
Preceding blogs on metrology have introduced some basic concepts which can serve as food for thought. Today, I would like to give you a couple of examples of the practical application of the concepts discussed so far in industrial cleaning applications. Monitoring Contaminant Removal – Everyone wants to know how long it takes for a … Continued
At first it may sound like a “no-brainer,” but deciding what to measure can be a challenge. The first part of that challenge is determining what measurements are required to establish that a particular criteria has been met. The next is to determine if the tools required to perform the required measurements are available and, … Continued
Sweep in ultrasonic lingo simply means varying the ultrasonic frequency up and down. A sound clip in an earlier post demonstrated the sound of sweeping the ultrasonic frequency. Single Frequency Sweep In an earlier post we also learned that ultrasonic transducers have a property called “resonance.” Very simply, this means that they will make a … Continued
In today’s blog we once again bring ultrasonic sounds into the range of human audibility and listen to the sound of frequency sweep. Previous blogs have revealed the sound of amplitude modulation and pulse modulation. Frequency sweep is all about frequency – ideally there is no change in amplitude as frequency is varied. In some … Continued
