My fan will cool a serverrack.
Then I would think accuracy was the last of your problems, calibrating against any half-decent thermometer would do.
But the temperature sensor will be place in the ceiling.
Normally you sense at the location that needs cooling, just be careful that there's no reason the relationship between the ceiling temp and the server temp is not linear. EG if there's a window that allows a breeze to flow along the ceiling the sensor will think it's nice and cool while the server is cooking.
Also you have to look at the temp difference between the ceiling and the server box, no point calibrating for the ceiling of the server is always 20C hotter.
BTW I won't be online for the next few days or even a week, so if there are any more questions maybe someone else can answer.
This design project is already accepted :)
I read a research that some serverrack has holes in the top of the rack. Then the temperature of server rack will go directly to the top of the room.
I just need to get an idea how can i test my temperature sensor if its accurate. Please help me.
do you have suggested tables. or suggested temperature to compare. Because i think i need to get 4 different temperature and i don't know how to get these measurement. My other idea is pump a hair blower to my sensor. Or some dry ice I think. Because my design prototype will be placed in a box. I don't know what kind of box yet. But i will represent the server room.
My device will run depending on the temperature . If the temperature is 13C and below. The fan will be off. If the temperature is between 13C and 18, Fan will be level 1. If the temperature is between 19 and 22, Fan will be level 2. And 23 and above. The fan will be level 3 which is the max level.
I already make a design that will run this things. All i need now is the data gathering for my thesis.
I based the temperature because i read a research that a "SERVER ROOM TEMPERATURE" should range from 13C to 22C.
PS: I will be using 4 temperature sensor.(4 LM35 to get the average temperature)