How precise do yo need to be?
how much money do you want to spend?
If you are loading trough a nozzle , this means it comes from a pneumatic transport system , right?
You are disengaging in the bag?
you must have sone sort of filter then your measurement is not going to be very good.
then how fast do you have to be?
If you do not have pressure, impact loads , or a need for precission.
Any electronic load cell will do the job, if you can do it yourselves with strain gages remenber to compensate for temperature.
Or use the archimides principle, float the bag in a container within a container with water, keep the tolerances tight but not too tight. and read the water level, if necesary use a sepparate transparent pipe and incline it to amplify the readings.
When you are a student you have to use your creativity not your money, new products are generated this way all the time. The proffeessor gives you a challenge, prefferably he detects a need, you provide your time yoiur hands and your un contaminated minds.
try everything buy nothing.
if you need more help e mail me at email@example.com
Sponge Iron (DRI) handling
Sponge Iron DRI Automated Storage Firefighting and Root Cause Analysis
Pneumatic Conveying Consultants
Phone 5281 8300 4456.