>Take a look at Zetex ZXCT1009 and ZXCT1010 (from Mouser),
...

Also the LT6100 and LTC6101 from Linear Technology, and HV7800 from Supertex 
Inc. This one can be used at mains voltages (up to around 400V IIRC).

>You can put two on them back-to-back to measure bi-directional
>current.

These would all need the same as well for that purpose. 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist