I hate to be a spoilsport but I believe we are also missing something which will react at millivolt or milliamp/meter field intensities. All these other sensors are reacting to relatively strong stimuli.
---------- >From: "Veit, Andy" <[email protected]> >To: EMC-PSTC Discussion Group <[email protected]> >Subject: RE: EMI sniffer goggles >Date: Wed, Aug 8, 2001, 7:23 AM > > > Along the lines of "EMI sensitive paper"... > > There is such a thing for viewing magnetic fields, funnily enough. Its > called "Magnetic Viewing Paper" and McMaster Carr has it for $14.22 for 27 > square inches, p/n 5702K21. When the paper is laid over magnets, the paper > shows the outline and shape of the field lines. Its handy for checking > magnet assemblies for motors, and I have seen it used for this purpose. > > Another interesting paper is the new "electronic paper" being developed for > electronic books. Embedded in the construction of the paper are millions of > tiny spheres. Half of each sphere is black, half white. The spheres are > aligned during the "printing" process with magnetic fields to show light or > dark areas. There were photos and an article in the new issue of one of the > free design rags that pile up on my desk. > > And don't forget that X-rays have been used to expose film for over 100 > years. > > Sounds like we're "just" missing something sensitive to the portion of the > spectrum between DC and X-rays! ;-) > > -Andy > > Andrew Veit > Systems Design Engineer > MTS Systems Corp > Ph: 919.677.2507 > Fax: 919.677.2480 > 1001 Sheldon Drive > Cary, NC 27513 > > > -----Original Message----- > From: Doug McKean [mailto:[email protected]] > Sent: Tuesday, August 07, 2001 5:18 PM > To: EMC-PSTC Discussion Group > Subject: Re: EMI sniffer goggles > > > > Okay, here's what I'd like to have ... > > Translucent material which is color responsive to emi. > Similar to the material on the side of batteries which > responds to voltage levels. > > A pane of translucent material which can be put on the > end of a stick much like a pane of glass or a pane of > of it which could be stood from a floor support next > to the product and show a pattern of emi strengths > by color. > > Or, a thin sheet of it much like plastic wrap which can > be placed on a part of a product (such as a surface or > edge) which would also respond to field strength. > > Or, I could rip off a sheet much like plastic wrap about > a foot long and place over a pcb and instantly "see" the > emi patterns produced by the board. > > Near or far field use. > > There'd be 2 versions of the material: one for electric > fields which would respond with various shades of > red and another for magnetic fields which would > respond in various shades of blue. > > - Doug McKean > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: [email protected] > Dave Heald [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
