Scanning UV/VIS Spectrophotometer BK-UV1900 190-1100nm, 2nm Bandwidth (CAT#: STEM-LT-1009-ZJF)

The BK-UV1900 and BK-V1900 series scanning spectrophotometers are high-precision instruments designed for comprehensive spectroscopic analysis. With a wavelength range covering either UV/VIS (190–1100nm) or visible (320–1100nm) spectra, they support multiple operation modes including photometry, quantitative analysis, kinetics, multi-wavelength measurement, scanning, and six biological assay methods. The user-friendly TFT LCD interface, large memory for curve storage, and PC connectivity (for PC models) make these spectrophotometers versatile tools for both routine and advanced analytical applications.

BK-UV1900
Optical System: Single beam, grating 1200 lines/mm
Wavelength Range: 190–1100nm
Spectral Bandwidth: 2nm
Wavelength Accuracy: ±0.5nm
Wavelength Repeatability: ≤0.2nm
Photometric Accuracy: ±0.002A (0–0.5Abs), ±0.004A (0.5–1.0Abs), ±0.5%T (0–100%T)
Photometric Repeatability: 0.001Abs (0–0.5Abs), 0.002Abs (0.5–1.0Abs), ≤0.2%T (0–100%T)
Stray Light: ≤0.04%T @360nm; 220nm
Stability: ±0.001A/h @500nm
Baseline Flatness: ±0.002A
Noise: 0.0005Abs @500nm
BK-UV1900PC
Same as BK-UV1900, includes scanning software
BK-V1900
Same as BK-UV1900 except:
Wavelength Range: 320–1100nm
Light source: Tungsten lamp only
BK-V1900PC
Same as BK-V1900, includes scanning software
Common Specifications
Display: 480×272 65k true color TFT LCD
Photometric Mode: T, A, C, E
Photometric Range: 0–200%T, –0.301–3.0A
Detector: Silicon photodiode
Light Source: Deuterium & tungsten lamp (UV models), tungsten lamp (visible models)
Input: Membrane keypad
Output: USB print and data output, PC connection (PC models)
Standard Accessories:
UV models: 1cm glass cuvette×4, 1cm quartz cuvette×2, quadruple cuvette holder×1
Visible models: 1cm glass cuvette×4, quadruple cuvette holder×1
Scanning software (only for PC type)
Optional Accessories: Single slot cuvette holder, long path cuvette holder, micro cuvette, solid sample holder, deuterium lamp (UV only), tungsten lamp, quadruple cuvette holder, thermostatic absorption pools, reflection accessories, software packages
Power Supply: AC110/220V ±10%, 60/50Hz
Packing Size: 620×500×370 mm
Gross Weight: 18 kg (UV), 16.5 kg (Visible)

SiO2 coating optical mirror reduces external contamination.
High-quality grating and hermetic light path design for ultra-low stray light.
G-L-P self-check function for wavelength and photometry accuracy.
Real-time monitoring of Deuterium and Tungsten lamp lifetimes with advanced system.
Automatic wavelength calibration, lamp source change, and dark current calibration.

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