... precision 16 times higher2. Fully-closed solid-state optical system, grating post–spectro and fixed wavelength, can take ... testing, whole process in one machine4. Self-check function: self-check system failures after power on Main Technical Index:1. ... calibration assay, absorption spectrophotometry, dual-wavelength method3. Temperature control system: PELTIER temperature control component, 25°C, 30°C, ...