Excellent for schools and universities. Metal die cast housing make the PGL well suited for applications that demand both high precision and ruggedness. PGL balances combine the solid construction and fundamental features of a high precision top loader with the simple operation of a portable balance. Left and right tare keys. Applications for weighing include parts counting, weighing, percent weighing, check weighing, density calculation. ShockGuard overload three point protection. Below balance weighing. RS-232 interface included. AC or rechargeable battery operations. Three year warranty.