dft - Digital filter selection for sensor

I am having a LM35 sensor which gives $10\textrm{ mV}$ signal per degree rise of temperature. Now I have one question, which digital filter will be the best for this ?

This sensor will be use in very noisy industrial environment. Also digital filter have some cutoff frequency what should be the cutoff frequency set for this filter ? As signal coming from sensor is an analog signal but not a periodic frequency signal.

One I know is FIR Moving average filer. This takes the mean of previous samples. This I do not want to use as I have used it before, $$\frac 1N\sum_{n=0}^{N-1}x[k-n]$$

If I am right then DFT is not required as I am not interested in the spectrum analysis of the signal coming from LM35 sensor.

Is there any other DSP digital filter which I can use ?