A 7 nm mono-beam diode array visible spectrophotometer with 330-800 nm of available cover, it is miniature, user-friendly, clean and maintain, absorbency, percentage signal transmission, concentration and kinetics. Educational testing and tutorial guide included Grafico PC utility software interface and cable engineered for scientific education. The WPA S800 edition of Biochrom visible spectrophotometer is a miniature, light-weight with economic design. It is well-suited for student utilization in intensive teaching laboratories with a wide display that has user-friendly text and easy installation of the unit, offering fast results. It is compatible with standard 10 mm path-length curves or a test-tube adapter set is available for use with 10, 12 and 16 mm tubes. It analyzes absorbency, percentage of signal transmission and concentration, with ability to measure and mark output absorbency-time plots directly to chart register.