Double-Beam UV-Visible Spectrophotometer, 2 nm Spectral Bandwidth (CAT#: STEM-AL-6989-ZJF)

This spectrophotometer is designed for UV-visible photometric and spectral measurements. It uses a double-beam optical arrangement to measure sample optical response across its configured wavelength region. The instrument supports routine absorbance, transmittance, concentration, and related analytical workflows described in the source. Integrated data functions support spectral scanning and other measurement modes without requiring separate basic control hardware. The local display and control interface provide direct access to measurement settings, results, and spectral data. Data storage and external transfer functions support routine laboratory record handling. The optical and electronic design is intended to maintain stable operation during repeated laboratory measurements. Accessory and computer-control options allow the system to be adapted to different sample formats and analytical workflows.

Wavelength Range 190-1100 nm
Spectral Bandwidth 2 nm
Wavelength Accuracy ±0.1 nm At 656.1 nm And ±0.3 nm Across Full Range
Wavelength Repeatability ≤0.2 nm
Photometric Accuracy ±0.3%T Over 0-100%T
Photometric Repeatability ≤0.2%T Over 0-100%T
Stray Light ≤0.03%T
Baseline Drift ±0.001 A/h At 500 nm
Baseline Flatness ±0.001 A
Photometric Range 0-200%T, -4.0-4.0 A, 0-9999 C
Data Output USB
Display 320 × 240-Pixel 6-Inch LCD
Detector Silicon Photodiode
Light Sources Tungsten Lamp And Deuterium Lamp

Double-Path Double-Beam Optical System
Standalone Photometric And Spectral Analysis
Large LCD Interface
USB Data Output
Multi-Wavelength And Kinetic Measurement Functions
DNA/Protein Measurement Function
Data Printing Support