FEATURES ? The APEL AP-120 photoelectric colorimeter adopts latest advance in microprocessor technology, the instrument provides a large LED digital display for direct reading,%Transmittance, Absorbance and Concentration, and Auto Aero. ? The test results are displayed by a large digital LED ?displayer and are displayed digitally from 0 to 100% ?Transmittance, 0 to 1.999 Absorbance, and 0 to 1999 ?Concentration at each wavelength of 5 filters which are built in the equipment. ? Sample compartment is for square cuvettes. ? AP-120 can be used with AC adapter. ? AP-120 is suitable for educational, biochemistry, ?agriculture, water and wastewater fields. ? The AP-120 photoelectric colorimeter is equally reliable in laboratories, plants, classrooms or fields.