Why glycerine is used in pressure gauge?

We have pressure gauge and temperature gauge, the pressure gauge has glycerine and the temperature gauge doesn’t have it and why is that?

In most cases, glycerine filled pressure gauge is installed in a place where the chances of vibrations are high.

It’s just damping the motion of needle indicator and acting as small opposing torque to gear connected with the primary sensing element… in order to reduce wear, because of slight variations in pressure.