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Chapter 1
Overview
This chapter describes the Waters
®
1525µ and 1525EF (Extended Flow) HPLC Pumps,
discusses fluid-handling and electronic components, and explains control of the pumps.
The pumps combine the most important aspects of eluent delivery for HPLC: high
precision, reliability, smooth eluent flow, and proven performance.
Both pumps perform their intended functions equally well:
• The 1525µ Binary HPLC Pump is designed for precise, reproducible gradient delivery
at low flow rates up to 5 mL/minute (Figure 1-1
).
• The 1525EF Binary HPLC Pump is designed for increased flow rates of up to
22.5 mL/minute (Figure 1-2
).
Both pumps are controlled over the IEEE-488 interface by Waters MassLynx™ 4.0 SP1
and Breeze 3.3. The microprocessor-controlled stepper motor and noncircular gears of
each pump ensure smooth and precise flow regardless of backpressure, flow-rate setting,
or eluent compressibility.
Figure 1-1 Waters 1525µ Pump
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