Multi-analyte photometer is a portable microprocessor based photometer. It is offered with various features including pre-programmed to measure 30 analytes automatically. There is no need for sample preparation, mixing & chemical contact. The other features include readout in concentration, absorbance or percent transmittance, time & date tags and storage of up to 100 data points for download. It can also be used to measure any type of cuvette or vial, designed for photometric analysis, provided that they are either 13mm or 16mm in diameter, to show either absorbance or percent transmittance readings.