Are there automatic stalagmometers?
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Are there automatic stalagmometers (surface tension measuring devices) available for use? If so, where might I locate one? Manual ones are cumbersome and invite erroneous readings. The application is for measuring surface tension of chemical blanket agents design to minimize chrome air emissions...so much surface tension equals so much chrome emitted...at least in theory.
Thanks for any input.Sandra Wyman
I don't know, Sandra -- but maybe a reader does. But the American Electroplaters & Surface Finishers Society hosted the 4th Hard Chromium Plating Colloquium (1996) in Cleveland, and here is an abstract of one paper:
- "Conducting Surface Tension Measurements for Compliance with Chromium MACT Standard
Joelie Hill, Scientific Control Laboratories, Chicago, IL
Conducting surface tension measurements to consistently meet 45 dynes/centimeter is a compliance option for decorative chromium plating facilities under the U.S. EPA's National Emission Standards for Chromium Emissions (the MACT Standard). It is important to understand the various techniques and procedures for measuring surface tension in order to find a suitable method for your facility. This paper will cover methods with tensiometers (DuNouy ring and Wilhelmyplate), stalagmometers, capillary tubes, and various other methods..."
You could see if the proceedings are available. AESF / NASF (www.nasf.org) conducts periodic seminars on chrome compliance too.
Ted Mooney, P.E.
Pine Beach, New Jersey
June 8, 2010
The stalagmometer measures the number of drops coming from a known orifice to calculate the surface tension. KSV Instrument (now "Attension" by KSV Instruments) makes an AL-20 drop volume tensiometer based on the stalagmometer principle. It is an automatic stalagmometer.Greg Wills
- Linthicum Heights, Maryland, USA
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