MICROPROCESSOR FLAMICROPROCESSOR FLAME PHOTOMETER is an ideal instrument for the determination of Sodium, Potassium, Calcium and Lithium. It uses the latest microcontroller technology and advanced engineering techniques so as to give enhanced accuracy and reproducibility. Lt has soft touch membrane keys for ease of operation. The solution is aspirated through an atomizer. Air, sample and the fuel are mixed in the mixing chamber which is then sprayed as a very fine mist into the flame. The color of the flame is changed depending upon the concentration of elements present. A radiation from the flame passes through the sensing system and specific Narrow band interference filter which permits only the characteristic radiation to pass to the photo detector. The output of the Photo clerestory is then processed by the microcontroller and the final results are displayed on the digital display. The 5 point Calibration facility and non-linearly correction is provided through an automatic curve fitting software. Facility has been provided for Re-standardization with a single standard, thereby, eliminating the need of multiple standards once a calibration has been performed.