Bodger
Newbie level 3

I am a programming whiz, but an electronic dunderhead 
I have a friend that wants to measure temperatures from 100 deg F to 300 deg F (37 deg C to 150 deg C) on 8 different temperature sensors once every 30 seconds.
I want to know which would be better for this application, the primary concern is cost the less money the better.
I really do not know much about either thermocouples or thermistors, which would be better for this range of temperatures and monitor rates? The little I read about thermistors is that they only work good around 350 deg F, which is way above the temperatures we want to measure. Although the challenge of the nonlinear values is easy for me to handle, I can use many numerical methods to get to an accurate reading with a good set of data curves.
In this article:
https://linuxgazette.net/118/chong.html
The author uses the pc parallel port to do a/d conversion, yet it looks like each thermistor in his design uses 2 channels. Can you tell me why he uses 2 channels? Is there a way I could use only 1 channel (I need 8 sensors)?
Thanx
Bodger
aka Julian
I have a friend that wants to measure temperatures from 100 deg F to 300 deg F (37 deg C to 150 deg C) on 8 different temperature sensors once every 30 seconds.
I want to know which would be better for this application, the primary concern is cost the less money the better.
I really do not know much about either thermocouples or thermistors, which would be better for this range of temperatures and monitor rates? The little I read about thermistors is that they only work good around 350 deg F, which is way above the temperatures we want to measure. Although the challenge of the nonlinear values is easy for me to handle, I can use many numerical methods to get to an accurate reading with a good set of data curves.
In this article:
https://linuxgazette.net/118/chong.html
The author uses the pc parallel port to do a/d conversion, yet it looks like each thermistor in his design uses 2 channels. Can you tell me why he uses 2 channels? Is there a way I could use only 1 channel (I need 8 sensors)?
Thanx
Bodger
aka Julian