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Hewlett Packard 1100 Series G1312A Binary PumpThis unit's reliable design keeps maintenance to a minimum by using electronically-controlled active inlet-valves for flow rates up to 5.0 mL/min. Floating pistons ensure the highest seal, low internal and external volumes of capillary connections, minimum bench space needed due to two dual-piston, in-series pumps in one housing.A wide flow range starting at typically 50 uL/min for reproducible gradients at low flow with solvent degassing.The binary pump is based on a two-channel, dual-piston in-series design which comprises all essential functions that a solvent delivery system has to fulfill. Metering of solvent and delivery to the high-pressure side are performed by two pump assemblies which can generate pressure up to 400 bar.**This item has been tested for basic functionality. Unit has some stains from normal use. Front panel plastic lens is slightly scratched & back of unit is missing metal plate. See photos for details.Manufacturers Specifications:Power consumption: 220VAAmbient operating temperature: 455 C (41131 F)Ambient non-operating temperature: -4070 C (-4158 F)Humidity: < 95%, at 2540 C (77104 F) Non-condensingOperating Altitude: Up to 2000 m (6500 ft)Non-operating altitude: Up to 4600 M (14950 ft)Additional Prep Fees May Apply