drumfunk Posted August 27, 2008 Share Posted August 27, 2008 I want to purchase a thermal ammeter. I am not sure if that is the common name for the instrument. The ammeter measures the temperatur change undergone when the current runs through the instrument and then determines the current that must of run through it. I would appreciate any help in finding a distributor or manufacturer of this type of ammeter. David Link to comment Share on other sites More sharing options...
big314mp Posted August 27, 2008 Share Posted August 27, 2008 This? http://original.britannica.com/eb/topic-591330/thermal-ammeter Why a thermal one instead of a "normal" one? Link to comment Share on other sites More sharing options...
drumfunk Posted August 29, 2008 Author Share Posted August 29, 2008 I want a thermal ammeter because it does not have a bandwidth for which it can measure current accurately unlike other ammeters. Thanks a lot for answering all my questions. David Link to comment Share on other sites More sharing options...
big314mp Posted August 29, 2008 Share Posted August 29, 2008 You could build one And I'm only half joking...a two dollar thermocouple from radioshack and a resistor. Wrap the two together tightly in something insulating, and calibrate. Could be an interesting little project. Again, assuming you are building a tesla coil: You could make a small coil (few turns) around the primary to act as a transformer of sorts. The voltage on the little coil will be proportional to the field strength around the primary, which is directly related to the amps in the primary. Link to comment Share on other sites More sharing options...
drumfunk Posted September 2, 2008 Author Share Posted September 2, 2008 Thanks for the advice. I will look into building a thermal ammeter. David Link to comment Share on other sites More sharing options...
big314mp Posted September 2, 2008 Share Posted September 2, 2008 Post back if it works well...I'm quite curious. Link to comment Share on other sites More sharing options...
John Cuthber Posted September 2, 2008 Share Posted September 2, 2008 They are sometimes known as "hot wire" meters. http://www.practicalphysics.org/go/Experiment_698.html;jsessionid=alZLdQlAHb1 Link to comment Share on other sites More sharing options...
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