Products
Spectrophotometers
The Welso Basic 100/200 Series UV-Visible Spectrophotometer is designed to meet the essential analytical needs of teaching laboratories, research institutions, environmental monitoring, and industrial quality control.
Product Details
The Welso Basic 100/200 Series UV-Visible Spectrophotometer is designed to meet the essential analytical needs of teaching laboratories, research institutions, environmental monitoring, and industrial quality control. With reliable optical stability and intuitive operation, it is ideal for daily routine tests and foundational scientific experiments.

Key Features
Reinforced Structural Base
The instrument adopts a thickened and reinforced base design to ensure stable optical alignment, reducing mechanical vibration and enhancing measurement repeatability.
Sealed Monochromator Design
The enclosed monochromator prevents dust and humidity from affecting the optical system, ensuring long-term reliability and prolonging instrument service life.
High-Stability Light Sources
Equipped with a long-life deuterium lamp and tungsten lamp (≥2000 hours lifespan), with a user-friendly plug-in lamp holder for quick replacement and reduced maintenance difficulty.
High-Resolution Optical System
The 1200 line/mm holographic grating and moisture-resistant optical mirrors provide high spectral resolution and precise absorbance measurement, improving test accuracy.
Measurement Capabilities
Supports photometric measurement, quantitative analysis, and standard curve creation, meeting the needs of routine laboratory testing and scientific research study.
Typical Applications
University and college chemistry & biology teaching labs
Pharmaceutical ingredient purity analysis
Water quality and environmental monitoring
Food and beverage production quality testing
Research lab sample absorbance and concentration measurement
Welso Basic Series — A stable and economical UV-Vis solution for daily laboratory workflows.
Technical Specifications
Specification | WSVT100 | WSVT200 | WSUT100 | WSUT200 |
Optical System | 1200 line/mm Grating, Single Beam | |||
Wavelength Range | 325–1100 nm | 320–1100 nm | 195–1100 nm | 190–1100 nm |
Spectral Bandwidth | 4.0 nm | 4.0 nm / 2.0 nm | 4.0 nm | 4.0 nm / 2.0 nm |
Wavelength Accuracy | ±1.5 nm | ±0.8 nm | ±1.5 nm | ±0.8 nm |
Wavelength Repeatability | ≤0.2 nm | |||
Photometric Accuracy | ±0.004A (0–0.5Abs), ±0.008A (0.5–1.0Abs), ±0.5% T (0–100%T) | |||
Photometric Repeatability | ±0.002A (0–0.5Abs), ±0.004A (0.5–1.0Abs), ±0.2% T (0–100%T) | |||
Stray Light | ≤0.1 T @ 360 nm | ≤0.1 T @ 360 nm; 220 nm | ||
Stability | ±0.002A / h @ 500 nm | |||
Baseline Flatness | ±0.004A | |||
Noise | ±0.001Abs | |||
Display | 480×272, 5-inch touch screen | |||
Photometric Mode | T, A, C | |||
Photometric Range | 0–200% T, –0.301–3.0A, 0–9999.9C | |||
Detector | Silicon Photodiode | |||
Light Source | Deuterium Lamp, Tungsten Lamp | |||
Input | Touch Screen | |||
Interface | USB-B ×1 | |||
+86 21 51096910
sales@welsobio.com
marketing@welsobio.com
1-1009, National Industrial Design Park, No. 599 Jianzhu Road, Binhu, Wuxi , Jiangsu, China, 214062
Head Office: No. 439 Jinglian Road, Minhang District, Shanghai,China, 201108