Post by thread:[OT] Medium temperature sensor

Related question ... I just want to know what to use to measure a domestic cooking oven ... that's a mere 300C maximum. The DS1820 tends to melt, I think. I'd like to more accurately regulate the temperature. -- James Cameron (spam_OUTcameronTakeThisOuTstl.dec.com) Digital Equipment Corporation (Australia) Pty. Ltd. A.C.N. 000 446 800

James asked: >Related question ... I just want to know what to use to measure a >domestic cooking oven ... that's a mere 300C maximum. The DS1820 tends >to melt, I think. > >I'd like to more accurately regulate the temperature. > A Platinum RTD might be a good choice. You need an op-amp to bring the signal up to a useable level. But you can get inexpensive ones (< $10) and they are quite stable. Reg Neale

On Tue, 27 Oct 1998, James Cameron wrote: > Related question ... I just want to know what to use to measure a > domestic cooking oven ... that's a mere 300C maximum. The DS1820 tends > to melt, I think. > > I'd like to more accurately regulate the temperature. Thermocouple again... Peter

Peter L. Peres wrote: > > On Tue, 27 Oct 1998, James Cameron wrote: > > > Related question ... I just want to know what to use to measure a > > domestic cooking oven ... that's a mere 300C maximum. The DS1820 tends > > to melt, I think. > > > > I'd like to more accurately regulate the temperature. > > Thermocouple again... > > Peter Hi, Thermocouple is not good for this temperature range : 1. Small output 2. Need cold side compensation. I sugested Platinum RTD. PT-100 or PT-500. Ju need only drive it with current source and measure voltage on it. These devices at +266 oC doubles his resistance. PT-100 is 100oM at 0 oC , PT-500 - 500oM at 0 oC. B.R., Saras.