... post–spectro and fixed wavelength, can take dual-wavelength measurement3. 20 years of maintenance-free period for grating monochromator, all-digital ... point calibration assay, absorption spectrophotometry, dual-wavelength method3. Temperature control system: PELTIER temperature control component, 25°C, 30°C, 32°C, 37° ... Sample Volume:200-9999μL (adjustable) HF-800A Semi-Automatic Biochemical Analyzer