581-S photoelectric colorimeter, compact instrument, simple structure, clear digital display; High precision, low price, and good performance. Direct reading of concentration, easy operation, and rapid testing. Can be used for rapid and precise colorimetric analysis in daily experiments by industrial analysis and medical laboratories.

Technical Specifications:
Wavelength range: 400-700mm
Range: T.0-A.0-1.999: C0-199.9
Sensitivity: ≥ 0.01 absorbance (measured by injecting 0.001% potassium dichromate solution into a 10mm cuvette/cup and using a No. 42 color filter)
T/A: Conversion accuracy: ≤± 0.00 (at 0.)
Stability: After preheating for 15 minutes, zero drift ≤ 1.5% T/3min
Reproducibility: Reading error of the same solution ≤ 0.5% (T)
Power supply voltage: AC 220V
Net weight of the instrument: 4.5 kilograms Gross weight: 6.75 kilograms
Dimensions: 350 × 300 × 140 millimeters