Letter 5077

Spiral Contractometer 

. Greetings, We are developing a high speed near zero stress nickel electroforming bath. As such our method of measuring the stress in the bath does not translate easily into Pounds per square foot, however a Brenner-Senderhof Spiral Contractometer does. My question is Where can I get a contractometer? I thank you in advance for any help I receive. Anthony J. Covey Corona, California

A spiral contractometer is a slow test. The same plating solution at the same temp with the same coil, stripped and prepped can easily give data that is 1-2000 different. Two people testing a split sample on different equipment will rarely get the same answer. I bought mine from Kammaras, year ago. King Corp, Larry sells one also.

Quality Control Instruments in Oak Ridge, TN sells a modified one based on a Boeing patent. While I have never used one, but from having my hands on one, This looks like it would be considerable easier to load, calibrate and operate. If I were to do it again, it is the way that I would go.

James Watts
- Florida

To James Watts-

I, too, want one of the easier to handle contractometers. I tried to contact Quality Control Instruments in Oak Ridge, TN and the operator told "no such place". Do you have a number?

Jeanne Kitazaki
United Airlines - San Francisco, CA

The units in question are now offered by QCI's successor, Industrial Instruments Inc. in Newport News, Virginia.

 
Ted Mooney, P.E.
Finishing.com - Brick, NJ

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