The kit consists of one 8"x8" or 12"x12" weigh module made using either the RAP3 or RAP4 load cells and two plates for base and top. You can remove the plates and customize it to add additional holes to fit foot sizes of various tank and tank leg configurations. The kit does NOT come with any interface or calibration. If you apply a 10V DC voltage to the device, then for a full scale load the output will change by approx 20 mV proporational to applied loads.Just add analog milliovlt Force vs Voltage calibration to the order so that it is factory calibrated and can be used with your PLC or Data Acquisition system. You can add a DI-1000U or USB output or a DI-1000ZP/DI-1000BLE/DI-1000WiFi for wireless output.