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Originally Posted by pHaestus
1a) for pH 
Some SERIOUS comments:
I actually really like my Digitec thermometers that use thermistors. They are incredibly robust and very stable. But they aren't much good for measuring air temperatures because the fluctuations kill you (you just can't physically record temperatures rapidly enough to get good statistically sound data).
Does the Cole-Parmer unit accept YSI 400 or 700 or both type thermistors? If it accepts 400 then look for the little 1/8" sheathed probes. I have a Fisher Scientific number for them if needed. They'd be good for your die sim; better than the larger units for sure. Do you need any more 700 series probes? I have a box full of them for liquid or air measurement (from my Digitecs)...
I would get at least another Cole-Parmer unit if you possibly can. You probably have to give the temperature reading a minute or two (check the manual) to stabilize fully when you switch channels. This makes it hard to record die and water in temps. I have 3 digitecs on top of one another (wb in, wb out, and air) and that seems to work "OK" for doing testing. |
I am not 100% sure but I think the Digitec D5830 is the same as the Cole Parmer unit I got. Digitec unit:
http://www.process-controls.com/Inst...ors_D5830.html . My Cole Parmer unit:
http://www.coleparmer.com/catalog/pr...=1&sel=0850216
They look identical. Which units do you have?
The one I have has a temp differential button. I hit that button and it tells me the temp differential between 2 probes.
I was planing on using that for the dT measurments. It accepts 400, 500 and 700 series. The three probes I got now are rather large, they are 700 series. I would like to get some smaller one's. I will look into those 400 series one's. I guess I need those to design the die sim around.