Description
The Unico SQ4802 Double Beam Spectrophotometer delivers precise UV-Vis absorbance measurements with a 1.8 nm slit width, split beam optics, and a user-friendly LCD display. Designed for academic, industrial, and clinical laboratories, it ensures high-resolution, reproducible results for complex analytical workflows.
- Split Beam Design with 1200 Lines/mm Grating – Provides real-time reference correction for high photometric stability.
- Wavelength Range of 190–1100 nm – Ideal for UV and visible spectrum quantitative analysis.
- 1.8 nm Spectral Bandpass – Delivers sharp peak resolution for nucleic acid and protein assays.
- Low Stray Light (<0.1%) & Flat Baseline (±0.002 A) – Supports high-integrity data for regulated environments.
- Integrated LCD Display (320×240) – Facilitates standalone operation and real-time data monitoring.
Reliable, High-Resolution UV-Vis Spectrophotometry for Modern Labs
The Unico SQ4802 is a high-performance double beam spectrophotometer designed to meet the precision and throughput needs of research and quality control laboratories. With a wavelength range of 190–1100 nm, narrow 1.8 nm bandpass, and robust optical stability, it excels in applications requiring accurate absorbance, transmittance, and concentration measurements. Its large-format LCD display and intuitive interface allow seamless standalone operation, while its rugged construction ensures consistent performance in high-volume environments.
Features and Benefits
Enhanced Optical Precision
- Split Beam Optical System: Uses a dual light path to simultaneously measure sample and reference, minimizing drift and enhancing measurement reliability.
- 1200 Lines/mm Grating: Produces high-resolution dispersion for accurate spectral analysis.
Accurate UV-Vis Performance
- 1.8 nm Spectral Bandpass: Ensures precise detection of closely spaced peaks in absorbance curves.
- Wavelength Accuracy ±0.3 nm | Repeatability ±0.2 nm: Enables reproducible assay performance in critical testing environments.
- Low Stray Light (<0.1% T): Delivers superior optical clarity at 220 nm and 340 nm.
User-Friendly Operation
- 320×240 Dot Matrix LCD Display: Shows real-time results, method parameters, and absorbance curves.
- Menu-Driven Keypad Interface: Simplifies operation, setup, and calibration without requiring a PC.
- RS-232 Interface: Enables optional PC connectivity for data export and software control.
Product Specifications
Optical and Measurement System
- Optical Configuration: Split beam with 1200 lines/mm holographic grating
- Wavelength Range: 190–1100 nm – Covers full UV to visible spectrum
- Spectral Bandpass: 1.8 nm – Supports high-resolution peak analysis
- Wavelength Accuracy: ±0.3 nm – Ensures precise wavelength targeting
- Wavelength Repeatability: ±0.2 nm – Critical for reproducibility
- Photometric Range: 0–200% Transmittance (%T), –0.3 to 3.0 Absorbance (A)
- Photometric Accuracy: ±0.3% T – Suitable for regulated lab protocols
- Photometric Repeatability: ±0.2% T – Supports consistent results
- Baseline Flatness: ±0.002 A – Improves full-spectrum data quality
- Stray Light: <0.1% T at 220 nm and 340 nm – Minimizes spectral noise
Detection and Illumination
- Detector Type: Silicon photodiode – High-sensitivity response
- Light Sources:
- Deuterium lamp for UV (190–360 nm)
- Tungsten-halogen lamp for visible (360–1100 nm)
Display and Control Interface
- Display: 320×240 pixel dot matrix LCD – Clear visualization of data and functions
- User Interface: Keypad control with menu navigation
- Connectivity: RS-232 port for optional PC communication
Sample Handling
- Cuvette Compatibility: Standard 10 mm optical path cuvettes
- Sample Compartment: Static single-position holder; multi-cell options available separately
Physical Specifications
- Instrument Dimensions: 24.4 in (L) × 15.7 in (W) × 11 in (H) | 620 × 400 × 280 mm
- Net Weight: 53 lbs (24 kg)
- Shipping Dimensions: 28.3 in (L) × 20.7 in (W) × 14.6 in (H) | 720 × 525 × 370 mm
- Shipping Weight: 62 lbs (28 kg)
Why Choose the Unico SQ4802 Over Other Spectrophotometers?
The Unico SQ4802 offers laboratory-grade precision with intuitive operation and a compact footprint. Its narrow spectral bandpass, low stray light, and real-time LCD output make it an ideal choice for UV-Vis applications in research, clinical diagnostics, and industrial quality control.
- Real-time split beam measurement for optical stability
- High-resolution 1.8 nm slit width enhances spectral accuracy
- Integrated LCD screen for data display without a PC
- Robust, lab-ready construction with compact dimensions
- Meets performance needs for FDA, CE, and ISO-regulated environments
Manuals and Troubleshooting Guides
- Unico SQ4802 Double Beam Spectrophotometer – User's Guide
- Unico SQ4802 Double Beam Spectrophotometer – Catalog
Frequently Asked Questions (FAQs)
What is the wavelength range of the Unico SQ4802?
The Unico SQ4802 measures from 190 to 1100 nm, covering ultraviolet and visible light spectrums.
Can the SQ4802 operate without a PC?
Yes, the Unico SQ4802 features a standalone keypad and LCD for full functionality.
What is the benefit of split beam over single beam?
Split beam optics measure sample and reference simultaneously, reducing drift and increasing accuracy.
Is the spectrophotometer suitable for regulatory labs?
Yes, with low stray light, high accuracy, and repeatability, the Unico SQ4802 meets lab compliance standards.
How is data displayed and exported?
Data appears on a high-resolution LCD and can be exported via RS-232 to a connected PC.
