Date: Mon, 11 Aug 1997 03:49:43 -0800 From: Robert L. Smith To: Multiple recipients of list CHIPDIR-L Subject: Re: Hall Effect Sensors At 10:33 PM 8/10/97 -0800, you wrote: >Hello everybody! > >I am looking for Hall Effect Sensors that can measure D.C. current between 10A to 100A. Can anybody please help? > >Thanks in advance and best regards. > >Udit -- >Author: Udit Mukhopadhyay This topic was pretty well discussed a few weeks ago. Here is a copy of one of the last messages that pretty well sumarizes it. *************************************************************************** > >Dear colleagues, > I am looking for the sensors for measuring > 1) large currents: 500A - 1000A > 2) High voltages: 3kV - 5kV >I suspect, that Hall sensors would be suitable for large >currents. What frequency range???? If mains power (50-400Hz) this is normally done with current transformers. Hall effect sensors will work also and, if properly designed, will extend to DC. At DC a current shunt will also probably do a good job. But I do not know who manufactures them. >What are the common types of Hall current sensors? Hall effect sensing breaks down into the closed loop technique and the open loop technique. PCIM ("Power Conversion and Intelligent Motion") magazine had a feature artical on hall effect sensors a few months ago which discussed these techniques. Try http://www.pcim.com and be sure to visit their Online Buyers Guide. If no luck there try http://www.eemonline.com for the online edition of the "Electronic Engineers Master" >Also, I would be grateful, if somebody would >point out some types of high voltage sensors, Human safety is the overriding concern here. Purchase a high voltage divider of known quality from an established supplier. DO NOT attempt to home brew one, resistors due funny (unpleasant) things under the influence of Kv range voltages. which >would allow me to read the high voltage safely into microcontroller. Use lots of safety devices, current limiting resistors and voltage limiting zeners, etc. and pray a lot!! *************************************************************** Even though your current range is less than the original poster, the information is still valid. Good Luck, Bob Smith