ShangHJ 4 Sets Digital Load Cell Weight Sensor + HX711 ADC Module Weighing Sensor for Arduino DIY Portable Electronic Kitchen Scale Kit (5kg)

Well, if the USB load cells are too expensive according to your other comment then you could just go with a simple load cell that connects to an Arduino which you can easily connect to your computer or better, connect to a MicroSD card which can then be read on the computer so that you don’t have to keep a PC near a rocket motor. Ex- https://www.amazon.com/ShangHJ-Digital-Weighing-Portable-Electronic/dp/B09VYSHW16/ref=sr_1_3?crid=2H42CWUV5RKM&dib=eyJ2IjoiMSJ9.t_rvSWshfwRN-4DdLxJODnCC1FnyVfnr5GztXS7HcKxTcYOf112oSWplA9x-8ZHv1GeWG5db_77Q56j3ewg151YYsLzf8TNjSBKFSQwMTc2nK8HXooee1yqGQtrPAGVZ_mVefydHscgZiXPddwC3Oh0Veu8B2ESZM9D28mAUKaYPufeGK5DtUz8XXwN2OBsO9qzPbcu0D_tIOzR2mxSjLrcD8V4jovljjBak8UK--Zc.AMCU8v7mljEuEvVMqm0PLPN4qi-1HSKXfGB9_pqIlnY&dib_tag=se&keywords=Load%2Bcell&qid=1768500614&sprefix=load%2Bce%2Caps%2C311&sr=8-3&th=1