Used Perfect Weighing Scales for sale - Perfect. Perfect WM Weighing Systems High Speed Checkweigher 35Kg Capacity Model WM35GEP-1000Q, with QC150FEG-S Scale Display. This Checkweigher can process 34-55 PC/Min. Memory can hold up to 100 products, TCP/IP, RS $4,950. Bardstown, KY, USA.