For long life sensors, paramagnetic are amongst the best. A couple of linx: http://www.yokogawa.com/an/oxy-gas/an-mg8e-001en.htm http://www.servomex.com/Servomex.nsf/GB/products_home.html Then there are companies with standard electrochem cells, for example http://www.gmiuk.com/ Echem will be less expensive and well suited to 1% to 21% O2. Paramagnetic will be better bellow 1%. If your just after a basic meter then some of the diving gas analysis units will be in the range of $100 to $500 http://www.vandagraph.co.uk/. Best Regards David Greig ______________________________ GigaDyne Ltd Buchan House Carnegie Campus Dunfermline KY11 8PL United Kingdom t: +44 (0)1383 624 975 www.gigadyne.co.uk ______________________________ -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Creswick, Steven Sent: 22 March 2006 17:31 To: [log in to unmask] Subject: Re: [TN] Oxygen sensor Richard, Also look into the MAP 9000 from PBI-Dansensor out of Denmark http://www.pbi-dansensor.com/content.asp?siteID=1&pageID=91. It has worked well for me - no cell to trouble with. Steve Creswick - Gentex Corp -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. Sent: Tuesday, March 21, 2006 3:12 PM To: [log in to unmask] Subject: [TN] Oxygen sensor Can anyone recommend a good oxygen sensor that can be used to verify the level of a nitrogen blanket? I am looking for one that can be used to verify the oxygen percentage inside of the reflow oven, or on a rework station, or within a nitrogen box used for storage of components. Thanks for any responses. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- -- Virus scanned by Lumison. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------