At 10:32 -0400 6/3/04, John Brohan wrote: >Hello > >I have a device which has a PT-100 temperature sensor. The probe of this is >too thick for what I need. I want to measure the temperature of liquid in a >test tube while I'm adding some reagent. It seems that the PT-100 is a >device with some size to it, and is just too bulky to fit in the test tube >along with a stir bar. I'd prefer to use a thermocouple. > >Does anyone know of a way to transform the signals from a thermocouple to >mimic the a PT100. Not really. A thermocouple generates its own voltage on a microvolt scale. A PT-100 is a resistor that changes its value which is about 100� at 0C.
BUT you can get some small PT-100 sensors. Sensing devices has a pt-12A which we buy a lot of. These are about 1.6 mm in diameter and 12 mm long. I think they also have an 8 mm long one. <http://www.thomasregister.com/olc/SmartCat.aspx?az=72980675&type=details_order&backlink=yes&template=http://www.sensingdevices.com/template.htm&counters=no&ptno=PT100/12A> -Scott
