I suppose that a sealed stainless steel tube, with the sensor inside, and between sensor and tube, you may put thermal conductive grease. I think it may be a solution. Gabriel.- -----Mensaje original----- De: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]En nombre de Claudio Martin Enviado el: Miircoles, 14 de Agosto de 2002 09:11 Para: PICLIST@MITVMA.MIT.EDU Asunto: Re: [EE]:Measure liquids temperature with 18S20 Liquid is wine stored in tanks and the range of temp. is from 10 to 30 degrees. Regarding the response time isn't that important, because it's a huge mass of liquid. I have to check the temperature at a point located at the center of the mass of liquid. This point is about 3 meter from the top cover of the tank. I guess one stainless steel tube could be a good solution, but one point to work out is how to keep the sensor in contact with the end of the tube, is there any kind of glue with a good thermal conductive coeficient?. >From: Spehro Pefhany >Reply-To: pic microcontroller discussion list >To: PICLIST@MITVMA.MIT.EDU >Subject: Re: [EE]:Measure liquids temperature with 18S20 >Date: Tue, 13 Aug 2002 17:42:19 -0400 > >At 05:44 PM 8/13/02 -0300, you wrote: >>What temperature range do you have to cover > >And what is the liquid? Human blood? 120'C fuming Nitric acid? Sewage? >Food? A microbial cell culture? The water in a hot tub? (same thing?) > >Any kind of sheath is going to slow down the response, and you have to >make sure that any materials that are in contact with the liquid are >compatible with it. Industrially, the most common probe material is >probably 300-series stainless steel tubing, TIG welded, which meets >NSF standards for food contact as well as being resistant to a lot of >common chemicals under normal conditions. > >Best regards, > >Spehro Pefhany --"it's the network..." "The Journey is the >reward" >speff@interlog.com Info for manufacturers: >http://www.trexon.com >Embedded software/hardware/analog Info for designers: >http://www.speff.com >9/11 United we Stand > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email listserv@mitvma.mit.edu with SET PICList DIGEST in the body _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu