- The APEL AP-1000M photoelectric colorimeter adopts latest advance in microprocessor technology, the instrument provides a large LCD digital display for direct reading, %Transmittance, Absorbance and Concentration, and Auto Aero. - The test results are displayed by a large digital LCD 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 contains both round test tube and square cuvette. - AP-1000M can be used not only with 9V battery but with optional 12V car battery adapter or AC adapter. - AP-1000M is suitable for educational, biochemistry, agriculture, water and wastewater fields. - The AP-1000M photoelectric colorimeter is equally reliable in laboratories, plants, classrooms or fields.