As long as you multiply both resistors by the same value , you can scale the resistance up to say 100k & 47k.
You could consider using a 50k trim pot for the 47k (if R1=100K) and that would allow you to calibrate the system .
As long as you multiply both resistors by the same value , you can scale the resistance up to say 100k & 47k.
You could consider using a 50k trim pot for the 47k (if R1=100K) and that would allow you to calibrate the system .