Performance: 1. Reasonable software, programmable biochemical test menu, 200 test programmes can be saved. 2. 1000 patients test data can be saved. 3. Clock CMOS chip inserted. 4. Hermetic solid-state optical system, low contamination of dust and dampness,long life time of hard membrane filters. 5. Back spectro photometry, 8 hard membrane filter, separate signal process circuit for each wavelength, filters select completed electronically,no mechanical movement. 6. Titanium alloy flow cell with small capacity and minimize cross-contamination. 7. Back-light LCD monitor and display character and curve simultaneously 8. Self-test program, test error