If you work at a site with a large air conditioning plant or a chilled water system, then chances are your facilities manager will have a conductivity cell. They are used as a very quick means to monitor water purity and to check for signs of corrosion.
Units are expressed in uS/cm and technically pure water is non conductive. In reality all water will contain conductive ions as soon as it is exposed to CO2 in the atmosphere. The higher the impurity of the water, the more ions available and the higher the conductivity. Typical example values would be, Ultra Pure water <1 uS/cm De Ionized Water <10uS/cm Drinking water 500-1200uS/cm Salt Water 5000-10,000uS/cm Water temperature is also plays a big factor, higher temp, again more ions, to higher conductivity. John Woodgate wrote: > I read in !emc-pstc that Rich Nute <ri...@sdd.hp.com> wrote (in > <200201030028.qaa08...@epgc264.sdd.hp.com>) about 'Electric Shock and > Water', on Wed, 2 Jan 2002: > >Is there a value (or range of values) for the > > resistance of water? > > The data exists; it depends, of course, on solute nature and > concentration. Try a web search. > > >Is there a standard way of > > measuring the resistance of water? > > Yes; a conductivity cell. An apparently simple device that isn't. Once > again, a web search will probably disclose more than you ever wanted to > know. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > After swimming across the Hellespont, I felt like a Hero. > > ------------------------------------------- > 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: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: pstc_ad...@garretson.org > Dave Heald davehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old > messages are imported into the new server. -- Andrew Carson - Product Safety Engineer, Xyratex, UK Phone: +44 (0)23 9249 6855 Fax: +44 (0)23 9249 6014 ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
