The WS1 Indicator is the basic weighing system. The display shows the weight in the hopper and this can be put into memory for each load.
The Spreader Monitor type WS2 monitors the hopper and spread rate, showing the weight in the hopper, total amount spread, average spread rate and the area covered. When the WS2 is actually spreading it shows the live spread rate. At the end of each field or batch, a record can be saved into memory with the date and time of spreading.
The WS3 model has the same functions as the WS2, but also has an output on RS232 of weight in hopper and current spreading rate for use in field mapping.