Instrumental factors:

i)          Furnace heating rate.

ii)        Recording or chart speed

iii)       Furnace atmosphere

iv)       Geometry of Sample holder/ location of sensors

v)         Sensitivity of recording mechanism.

vi)       Composition of sample container.

2.         Sample Characteristics:

a)         Amount of sample

b)         Solubility of evolved gases in sample.

c)         Particle size

d)        Heat of reaction

e)         Sample packing

f)          Nature of sample

g)         Thermal conductivity.

Now we will take up a few important factors within some detail.