Hello Hamid, Thursday, April 15, 2004, 7:29:19 AM, you wrote:
AH> hi AH> I am interested to know about the AH> liquid(oil/dielectric)spefication use in such AH> switches. I am interested to refurbish a sensr. AH> regard, AH> hamid There are several different principles of tilt switches around. The most common ones some years ago contained a small drop of mercury inside a sealed glass bulb and at least two contacts. When the drop of the liquid metal connected the two electrodes you knew the sensor had a certain position. Mercury is a highly toxic heavy metal and has since been banned in most countries of the western world. When such a sensor breaks the mercury can escape and has to be carefully cleaned up. Mercury vapor (at room temperature) is also highly toxic! Never try to reverse engineer, dismantle or otherwise investigate such a sensor! (unless you know what you are doing) The modern equivalent uses a small metallic ball inside an enclosure with two (or possibly more) electrodes. When the sensor has a certain position the ball will come to rest on top of the electrodes, closing the electric circuit. Modern sensors with a higher degree of resolution (instead of simply ON/OFF) would contain a micromechanic sensor inside a special chip. No chance for you to fix anything here - if it's broken, get a new one. Uwe. -- Author: Uwe Zimmermann INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
