Model 765 Description

Our Alcott Model 765 HPLC pump has been designed to comply with all facets of HPLC, from microbore applications, through preparative solvent deliveries to chemically inert requirements. Key among the design requirements for the Model 765 are reliability and cost effectiveness.

For a fraction of the cost of competing systems, the Model 765 provides much more. This is achieved by making additional capabilities available as standard to the basic system. For example, the 765 comes with a RS232C and 20mA Current Loop interface. These allow the user to control the pump from a central computer or manually on the lab bench. Since it is microcomputer based, the Model 765 allows parameter entry through a set of keys on the front panel. Also, visual feedback is provided via an LED display on the front panel. An additional standard feature is solvent compressibility control to help optimize your chromatography when you change solvents.

Solvent change is accomplished quickly and easily via a purge valve conveniently located on the front panel. Changes from microbore to analytical to preparative operation are attainable by simply exchanging pump heads, which are also located on the front panel.

For buffer applications, a piston rinsing option is available to reduce seal wear and to protect against piston damage. The microbore pump head provides flows from 0.001mL to 1 mL per minute, the analytical pump head allows flows from 0.01mL to 5 mL per minute, and the preparative pump head produces flows from 0.1mL to 20 mL per minute.

The Model 765 can sustain pressures up to 8900 psi (60 MPa) with the microbore pump head while preparative operation can go as high as 2200 psi (15 MPa).

The Model 765 HPLC Pump is a serial dual piston pump with only two check valves which provide a minimum rest pulsation. Use of an additional pulse dampener is generally not necessary, even when using a Refractive Index detector. Highly accurate piezoresistive pressure monitoring allows extremely fast control of the pump motor which results in virtually pulse-free flow.

Alcott’s Model 765 HPLC Pump is truly state-ofthe- art in LC solvent delivery. This pump is trouble-free and has every feature necessary for universal laboratory operation at a very reasonable price.