DNA capillary sequencer is a type of DNA sequencing instrument that uses capillary electrophoresis to separate and analyze DNA fragments. Capillary electrophoresis is a technique that separates molecules based on their size and charge, and is highly accurate and efficient for DNA sequencing. The DNA capillary sequencer consists of several key components, including a sample injection system, a capillary array, a laser detector, and a computer-controlled data analysis system. The sample injection system is used to load the DNA fragments onto the capillary array, where they are separated by capillary electrophoresis. The laser detector detects the separated DNA fragments as they pass through the capillary array, and the data is recorded and analyzed by the computer system.