Instrument Introduction:
UV visible spectrophotometer is an analytical instrument with a long history, wide coverage, and many uses. It has been widely used in scientific research and production work in various fields such as organic chemistry, biochemistry, drug analysis, food inspection, medicine and health, environmental protection, and life sciences.
As a professional manufacturer of analytical instruments, Beijing Puxi General Instrument Co., Ltd.'s years of experience in designing and manufacturing ultraviolet spectrophotometers are more fully reflected in the TU1901 series. The TU-1901 and TU-1900 UV visible spectrophotometer series products, with their excellent technical specifications and stable and reliable working characteristics, friendly and intuitive display interface, smooth human-machine dialogue operation, have successfully achieved the strict requirements of ultra-high precision and reliability measurement, which can greatly meet the needs of the most professional users for analysis work.

Technical parameters:
1. Wavelength range: 190nm～900nm
2. Wavelength accuracy: ± 0.3nm (automatically calibrated upon startup)
3. Wavelength repeatability: 0.1nm
4. Spectral bandwidth: TU-1900：2nm
TU-1901：0.1nm、0.2nm、0.5nm、1.0nm、2.0nm、5.0nm
5. Scattered light: ≤0.01%T(220nm,NaI； 340nm,NaNo2)
6. Luminous methods: transmittance, absorbance, reflectance, energy
7. Luminous range:- 4.0～4.0Abs
8. Luminous accuracy: ± 0.002Abs (0-0.5Abs); ±0.004Abs(0.5～1.0Abs)；
±0.3%T(0～100%T)
9. Luminous repeatability: 0.001Abs (0-0.5Abs); 0.002Abs(0.5～1.0Abs)
10. Baseline straightness: ± 0.001Abs
11. Baseline drift: 0.0004Abs/h (500nm, 0Abs preheated for 2 hours)
12. Luminous noise: ±0.0004Abs

Main features:
1. Strong instrument performance: extremely excellent optical system, advanced electronic system, high-level mechanical system, ensuring ultra-low stray light of 0.010% T;
2. Stable and reliable quality: The dual beam dynamic feedback proportional recording metering system ensures baseline stability; Key components such as deuterium lamps and photomultiplier tubes are imported to ensure the stability, reliability, and long lifespan of the instrument;
3. Accurate measurement: Using imported high-quality holographic gratings to further reduce instrument stray light and make instrument analysis more accurate;
4. Easy and efficient human-machine dialogue: UVWin Chinese operating software designed based on WINDOWS environment provides rich instrument control and operation functions. Easy to use, flexible and efficient, easily meeting the analysis requirements of users;
5. Excellent scalability: There are a large number of user selectable specialized accessories such as peristaltic sampler, ultra micro cell holder, constant temperature cell holder, optical integrating sphere, mirror reflection, fiber optic accessories, and colorimetric dish series, greatly expanding the application range of the instrument;
6. Simple and convenient equipment maintenance: The unique socket type tungsten lamp and deuterium lamp eliminate optical debugging when replacing the lamp, making equipment and instrument debugging and maintenance more convenient.