Unico Double Beam Spectrophotometer

The Unico SQ‑4802 is a high-performance double‑beam UV/Vis spectrophotometer with simultaneous sample and reference measurement. Designed for research, QA/QC, biotech, and clinical labs, it offers precise analytical analysis across a wide wavelength range with robust software and accessory support.

Overview

Equipped with dual detectors and a Littrow‑type monochromator (1200 lines/mm grating), the SQ‑4802 covers 190–1100 nm with a tight 1.8 nm bandwidth. It features a large backlit 320 × 240 LCD for viewing %T, absorbance, concentration, kinetics, scanning, and DNA/protein modes. USB and parallel ports allow data export and PC connectivity. Applications include quantitative analysis, standard curves, kinetics, multi-wavelength scanning, and more.

Key Features

• Double‑beam optical path: Simultaneous sample and reference measurement enhances precision
• Wide wavelength range: 190–1100 nm for UV through near-IR analysis
• 1.8 nm spectral bandwidth: Sharp resolution with minimal stray light
• Dual detectors: One for sample, one for reference—minimizes drift and noise
• Intuitive interface: Large LCD with onboard modes for %T, A, concentration, kinetics, DNA/protein, and scanning
• PC connectivity: USB and parallel ports for exporting data and optional software control
• Built‑in software: Standard curves, multi-wavelength, scanning, kinetics, DNA/protein readouts
• Auto calibration: Automatic wavelength calibration on startup improves reliability

Product Specifications

• Model: SQ‑4802
• Wavelength range: 190–1100 nm
• Spectral bandwidth: 1.8 nm
• Wavelength accuracy: ±0.3 nm
• Wavelength repeatability: ±0.2 nm
• Photometric range: 0–200 %T, –0.3 to 3.0 A
• Baseline flatness: ±0.002 A
• Stray light: <0.1 %T at 220 nm and 340 nm
• Display: 320 × 240 backlit LCD
• Monochromator: Double‑beam Littrow with 1200 lines/mm grating
• Light sources: Tungsten‑halogen and deuterium lamps
• Detectors: Silicon photodiodes (sample & reference)
• Ports: USB and parallel interfaces
• Dimensions: 620 × 400 × 280 mm
• Weight: 24 kg (53 lb); shipping ~28 kg (62 lb)
• Power: 115/230 VAC switchable, 50/60 Hz
• Certifications: CE, ISO 9001

Ideal For

• Pharmaceutical, biotech, and clinical laboratories
• Quantitative assays: absorbance, concentration, DNA/protein, kinetics
• Academic research and teaching labs requiring reliable scanning
• QA/QC and routine testing in production environments
• Users needing robust connectivity and PC data integration