Klett-Summerson MODEL 800-3 Photoelectric Colorimeter (Light doesn´t work)

Laboratory‑grade photoelectric colorimeter designed for quantitative color and turbidity measurements using the Klett color system. Widely used in microbiology, water analysis, and industrial quality control. Durable metal construction, simple operation, and stable optical performance. Manufactured in the USA. Technical Specifications Model: 800‑3 Instrument Type: Photoelectric colorimeter Measurement Method: Photoelectric light absorption Scale: Klett scale (transmittance converted to Klett units) Light Source: Tungsten/halogen lamp (internal) Optical Filters: Interchangeable Klett color filters (filter holder integrated) Sample Holder: Standard Klett cuvette slot Power Requirement: 110 VAC, 100W Frequency: 60 Hz Construction: Heavy‑duty painted metal housing Controls: Zero adjustment knob, filter selector, measurement readout Display Type: Analog dial indicator Wavelength Selection: Via removable color filters Operating Principle: Measures transmitted light intensity through sample cuvette Application Areas: Microbial growth monitoring, colorimetric assays, turbidity testing, laboratory research Origin: Made in U.S.A. Manufacturer: Klett Manufacturing Co., N.Y. Please review pictures carefully and let us know if you have any questions!