Laboratory 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, spectral analysis, and time-scan modes. The instrument can export all measurement data and reports via a USB flash drive, or it can be connected to a PC host with audit trail functionality to control the instrument, store data, and manage reports.

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 scans, and time-resolved scans. 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 laboratory 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.

• Standalone and PC Dual-Operation Modes: The main unit can independently complete parameter settings, measurements, and result viewing, or it can be connected to a PC host for instrument control and data processing.

• Full Data Export and Report Generation: In standalone mode, the unit supports exporting all measurement data and test reports via a USB flash drive, with support for A4-format PDF reports. The PC host supports storage of all measurement data, spectrum export, test report generation, and custom reports, facilitating the archiving of experimental data and verification of results.

• Audit Trail and Data Integrity Management: The PC host supports tiered user, role, and function-based permission management, with audit logs recording operations such as logins, parameter settings, method changes, and report exports. Combined with the raw data locking feature, this ensures a record of operations and data traceability, meeting laboratory audit management requirements.

• Spectral Bandwidth Configurable on Demand: 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 Extensions: 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 push-pull quadruple holder is available to facilitate sequential switching between multiple cuvettes, accommodating different pathlengths and sample loading arrangements.

• Lamp Replacement Without Calibration 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 Wi-Fi connectivity for software updates.