I want to purchase a thermal ammeter. However, I have been unable to locate a manufacturer or distributor of this type of ammeter. I might be using the incorrect name for this instrument. A thermal ammeter is an ammeter that uses the heating effect of a current to determine the current that is running through a circuit; this method is instead of the more common method of using an ammeter that measures the deflection of an electromagnet in which the current runs through.
David