Displacer-Type Level Transmitter

Did you try to contact the manufacturer? And why do you need to know the weight? The easiest way is to disassemble and weigh each component then add the weights for a total. Knowing the sizes is only going help if the material the component is made of, is it hollow or solid?

The basic equation for weight is;

Weight = (mass * gravitational acceleration) / (gravitational constant)

I am assuming this is in a level switch and would try the manufacturer first.

Good Luck