But, to use this temp sensor, and actually to use 6-8 of them, would involve the appropriate wiring and coding including the necessary #includes and #defines. So, while it looks like the TMP36 is probably the better choice from a cost standpoint and offers a range of -40C to 125C which is perfect for my application are there cheaper options that have a comparable range? The DS18B20, though more expensive, might be preferred if the number of analog inputs becomes a problem as it might with the Mega2560 so I plan to test this part out for S&G's if nothing else. My project idea, which I hope to bring to market at some point, would benefit from the cheapest solution possible given the need for 6-8 temp readings and even at $1.50 each that would bring the parts cost to perhaps $10 or more just for the temp values - I have several other sensors (current, fan speed) as well as several voltage readings I need to make so anywhere I can save money would be an advantage. I should mention that in addition to the Mega2560 (real one) I also have a Teensy 3.6. So, looking about there appears to be several options like the TMP36 or the DS18B20 with the first being cheaper but requiring a dedicated analog input pin for each sensor while the second one is more expensive but would not require any analog pins as best I can tell.

I do have one or more temps that could be below 0C and perhaps as low as -40C as this will be the ambient temp sensor so it could be below freezing. OK, I have a project idea that will require 6-8 temp sensors with most of the temps being in the range of 0C to 75C and more typically 15C to 50C. First off I'm new here and new to Arduino and I have a lot to learn!

Arduino sensors cost