Bill, Your link to https://is.alicdn.com/img/pb/747/046/531/531046747_904.jpg Leads me to a chart that while a bit fuzzy seems to be readable on my littl= e iPad. For instance the device is 50 Ohm at 0c, 71.400 Ohm at 50c and 82.1= 34 Ohm at 150c The link someone sent for the 100 Ohm probe at=20 http://www.thermometricscorp.com/images/Accessories/thermometricscorp_2129_= 12162627.gif Shows 100 Ohm at 0c, 142.108 at 100c, and 163.168 at 150c Almost but not quite exactly 2x the 50 Ohm probe. I would suggest that you figure out why you can't read your chart but if yo= u can't figure it out, I could send you a screen shot from my iPad Looking forward, Al Shinn (Tinker) --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .