Yellow Jacket 68802 HVAC Refrigerant Electronic Charging Scale 110 Lb 1999 Channel balance: 1dB or less B20939MAT Channel balance: 1dB or less (1kHz) This functionality is made possible by combining the rich radio system database from Radio Reference with Uniden's patented radio system selection methods to correctly identify and monitor only nearby systems in the USA and Canada The Ritchie (Yellow Jacket) 68802 is a digital electronic refrigerant charging scale with a 110 lb (50 kg) capacity designed for HVAC R technicians It eliminates refrigerant transfer between containers by allowing technicians to charge directly into or recover from a system while weighing the cylinder on the platform—real time digital display shows exactly how much refrigerant is being added or removed