Visible Spectrophotometer

Designed for routine visible-light analysis, this instrument employs a single-beam C-T optical system, a holographic grating, and a photodiode (PD), and is equipped with a tungsten lamp light source with a wavelength range of 320–1100 nm. Its compact design, combined with a 7-inch color capacitive touchscreen, facilitates laboratory bench setup and daily operation. It supports photometric measurements, multi-wavelength measurements, quantitative analysis, spectroscopy, and time-scan modes. The instrument can export all measurement data and reports to a USB flash drive.

It is suitable for routine visible-light colorimetric and quantitative analysis in applications such as water quality testing, environmental monitoring, food and beverage quality control, agricultural production testing, basic chemical analysis, and educational experiments. It is primarily used for samples that have undergone color development or exhibit characteristic absorption in the visible light region. It can be used to determine parameters such as ammonia nitrogen, nitrite nitrogen, and total phosphorus in water; formaldehyde, nitrogen oxides, and ammonia in air and exhaust gases; as well as cyanide, volatile phenols, and sulfides in soil and sediments, in accordance with relevant standard methods. It supports photometric measurements, multi-wavelength measurements, quantitative analysis via standard curves, spectral scanning, and time-resolved scanning. Its compact design makes it suitable for laboratories with limited space, as well as for daily teaching and quality control operations. The instrument’s measurement range is 320–1100 nm; it is not suitable for analyses that rely on absorption in the ultraviolet region for direct determination, such as the UV method for nitrate nitrogen, the UV method for total nitrogen using alkaline potassium persulfate digestion, and the direct UV determination of nucleic acids and proteins.

• Single-beam visible light measurement system: Utilizes a C-T monochromator, a 1200-line/mm holographic grating, and a photodiode (PD), equipped with a tungsten lamp light source. The wavelength range is 320–1100 nm, making it suitable for measuring absorbance and transmittance in the visible light region, as well as spectral scanning.

• Wavelength and Photometric Performance: Maximum permissible wavelength error of ±0.1 nm (at 536.2 nm) and ±0.5 nm (across the entire wavelength range); maximum permissible transmittance error of ±0.3%T (0–100%T); transmittance repeatability of ≤0.1%T; stray light of ≤0.05%T.

• Compact Design and Touchscreen Operation: Dimensions 460 × 360 × 205 mm (W × D × H), weight (14 ± 1) kg, making it easy to fit on a lab bench. Equipped with a 7-inch color capacitive touchscreen with a resolution of 1024 × 600, supporting both Chinese and English interfaces.

• Multi-mode Measurement and Data Processing: Supports photometric measurement, multi-wavelength measurement, spectral scanning, quantitative measurement, and time-resolved scanning; capable of fixed-wavelength measurement, quantitative analysis via calibration curves, and recording of absorbance changes over time. Equipped with automatic wavelength calibration, baseline correction, peak detection, and calibration curve fitting functions.

• Full Data Export and Report Generation: The standalone unit supports exporting all measurement data and test reports via a USB flash drive and generates A4-format PDF reports.

• Spectral Bandwidth Configurable as Needed: The standard configuration features a 2 nm spectral bandwidth, with optional specifications of 1 nm, 1.8 nm, and 4 nm available; users can select the appropriate configuration based on the bandwidth required by the measurement method.

• Multi-pathlength and Quadruple Holder Expansion: The standard configuration includes a 10 mm standard cuvette holder; optional adjustable-pathlength holders are available to accommodate pathlengths ranging from 10 to 100 mm. Additionally, an optional manual slide-out quadruple holder is available to facilitate sequential switching between multiple cuvettes, accommodating different pathlengths and sample loading arrangements.

• No Calibration Required After Light Source Replacement and Maintenance Management: No optical path recalibration is required after replacing the light source. The system supports recording of light source usage time, making it easy to track usage and schedule maintenance. The main unit supports software updates via Wi-Fi.