savage_tentation:
Hello guys, i need your help. New to arduino and this forum. I want to measure water temperature before and after my boiler. Can i attach some kind of sensor on the pipes and use arduino to show the 2 tempertatures on an lcd dispay? Which type of sensors? actually i need only the temp after the boiler but knowing the before/after would be cool.
The DS18B20 is good for +/- 0.5C up to 85C and to lesser accuracy to 125C. You can have a swag of DS18B20s shared on one pin. It is OK to use the type pictured above held against the pipe. I use a short length of foam pipe insulation. The sensor sits in a dab of heat sink paste but plain silicon goo should suffice.