I'm doing a lot of work with thermistors these days....my current prototype is <0.1c accuracy and 0.1c resolution on the digital side. This is from a $4 thermistor encased in copper. You'll actually find "standing air" response times published by most thermistor manufacturers -- as long as it's a thermistor truly meant for instrumentation. In my experience, they're in the order of 25s in standing air. Moving air, stirred oil, and water figures are sometimes supplied and will all be faster. Not sure if that really helps, my my 2 cents Canadian ;) -marc On Wed, Jun 25, 2008 at 12:13 AM, PicDude wrote: > > I'm searching for a fast temp sensor for measuring ambient air temperature > (with some overhead) -- say -10deg-C to 120deg-C. 1% accuracy or better. > > There are a lot of sensors that meet this numerical criteria, but what > types > of temps sensors are *fast*? I usually don't see response time listed in > the datasheets (and not even sure what the parameter is for response time), > and I don't have a specific value for how fast it should be, but I want to > compare various sensor types and start investigating/experimenting with the > fastest of these. > > I did find "fast response RTD's" and wondering how they compare > (speed-wise) > to other alternatives such as semiconductor sensors. I expect the plastic > housings for TO-92 types and similar would be enough of an insulator to > significantly increase the response time. Will the metal can versions > (TO-39 IIRC) be considerably faster? Open element sensors and low-mass > sensors should be fast. But I'm sure I am missing a lot of other > possibilities here. > > Any links/clues on this? > > Thanks, > -Neil. > > -- > View this message in context: > http://www.nabble.com/Fast-temp-sensor--tp18104658p18104658.html > Sent from the PIC - [EE] mailing list archive at Nabble.com. > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist