The product is an economical analytical instrument with RS232 (not included) interface output. Excellent metering accuracy is higher than that of the same instrument. It is widely used in medical testing, food, petrochemical industry, environmental protection and monitoring. field. Product description: Optical system: achromatic Czerny-Turner (1200L / mm grating) Wavelength range: 350-1020 nm Wavelength accuracy: ±2nm Spectral bandwidth: 6nm Wavelength repeatability: ≤1nm Stray light: ≤0.1%T @ 360nm Photometric accuracy: 0.5% T Photometric repeatability: 0.2% T Drift: ≤0.2%T Noise: ≤0.3%T Stability: ±0.004A / h@500nm Working mode: T, A, C Zero mode: automatic Wavelength drive mode: manual wavelength Print interface: optional RS232 (not included) Energy (light source): tungsten lamp Weight: 10 kg The package includes: 1 x visible spectrophotometer 1 x power cord 1 x glass cuvette 1 x instruction Note: Place it in dry, shady, no sun exposure. Dust cleaning is necessary at intervals