inductive Ammeter
 

What are some good inductive ammeters and where can I buy them?

Those only work far AC AFAIK. Is this for a car? There are hall type that work for DC but I don't know if any are any for automotive use and I don't know what they cost. What are you trying to measure?

I am trying to measure amp draw of devices to isolate what is draining the battery down on my 1991 190E 2.6. There are specs for how many miliamps each device should draw. Is there a way to test this with a DVOM or do I need a inductive ammeter?

There are numerous threads on this subject. Search on "battery drain". The only problem is there are about 20 different ideas on how to do it. Inductive definitely will not work for DC. The usual approach is to put a 10 ohm resistor in series with the battery during the test and measure the voltage across it. Using Ohm's law, you will get 1 volt for every 100 mA, .1V for every 10 mA etc. You could also use a 1 ohm and then you get 1V per Amp , 1mV per mA etc. Technically you can use a multi-meter to measure current directly, but many people find that hard to set up so the resistor method is more straightforward. If you are looking for really small currents then the 10 ohm will probably work better since it will yield 10x the voltage for a given current.

You can't measure a milliamp draw with an affordable inductive ammeter. A simple DVOM is what you need.

Take each fuse out, one at a time, and measure the current with a meter. Write each value down for each fuse location. Check to see what is on each circuit and isolate the excessive drain from there.

Uh, not exactly.

http://us.fluke.com/usen/products/AccessoryDetail.htm?cs_id=2106%28FlukeProducts%29&catalog_name=FlukeUnitedStates&Category=PRCU(Fluke Products)

That is hall, not inductive. Inductive uses a current transformer. Hall uses a semiconductor (hall type) sensor. Induction by definition involves a change in current and/or magnetic flux. With DC there is no change. That is why inductive sensors will not sense anything when exposed to DC current. Hall type senses absolute magnetic flux so can sense AC or DC.