Features: Microprocessor control, 16×2 LCD display; Auto zero and auto 100%T adjustment provided; Calibration curve can be set up by either measuring or entering up to 10 standards or entering K and B factors directly via the keyboard; Parameters can be saved for later use; Up to 10 calibration curves can be stored and edited for user’s convenience; Standard manual 4-cell holder accommodates cells from 5-50mm and changeable to long path length cell holder of 100mm. Data can be printed out via a printer port; PC control measurement can be achieved via a USB port for more accurate and flexible requirements.