EV-2800 Single Beam UV/VIS Spectrophotometer

Product Introduction

The EV-2800 Single Beam UV/VIS Spectrophotometer is a laboratory analytical instrument designed for quantitative and qualitative optical measurements. Featuring a single-beam optical system, a fixed spectral bandwidth of 1.8 nm, and a wavelength range of 320–1100 nm, it supports routine absorbance, transmittance, and concentration analysis. Its high-quality holographic grating, silicon photodiode detector, and low-stray-light optical design provide reliable measurement performance for laboratory testing. The large 320 × 240-dot LCD, automatic wavelength setting, real-time data storage, and optional PC scanning software make the EV-2800 suitable for universities, research institutions, and industrial quality control laboratories.

Performance Features

• Reliable Single-Beam Optical System: Supports routine UV-visible spectrophotometric analysis with a 1.8 nm fixed spectral bandwidth.

•  Wide Wavelength Coverage: Measures from 320 to 1100 nm for visible and near-infrared applications.

• Low Stray Light and Noise: The optimized optical system helps improve measurement reliability.

• High-Precision Data Processing: A high-speed microcontroller and high-precision analog-to-digital conversion support efficient data acquisition.

•  Automatic Wavelength Setting: Provides automatic wavelength adjustment with 0.1 nm resolution and automatic blanking.

•  Large Graphic LCD: The 320 × 240-dot display presents measurement results and spectral curves clearly.

•  Real-Time Data Storage: Saves measurement data and curves for convenient review.

•  High-Quality Optical Components: Uses a blazed holographic grating, silicon photodiode detector, and pre-aligned tungsten and deuterium lamps.

• Convenient Lamp Maintenance: Each lamp can be switched on or off independently, and pre-aligned lamps simplify replacement.

•  Flexible Data Output: USB and RS232 interfaces support data communication, with mini serial and PC printer compatibility.

•  Optional PC Scanning Software: Enables additional spectral scanning and data analysis.

•  Durable Construction: A reinforced baseboard and bracket support long-term laboratory operation.

Working Principle

The EV-2800 uses single-beam UV-visible spectrophotometry to measure the interaction between light and a sample. Light from the tungsten or deuterium lamp passes through a monochromator equipped with a 1200-lines/mm blazed holographic grating, which selects the required wavelength. The selected light passes through the sample, and a silicon photodiode detects the transmitted intensity. The instrument compares the measured intensity with the reference or blank intensity to calculate absorbance or transmittance. These measurements can then be used for concentration determination, standard curve analysis, and qualitative spectral evaluation.

Technical Parameters

Application Scenarios

• University Laboratories: Supports teaching and research in analytical chemistry, spectroscopy, and material characterization.

• Quality Control Laboratories: Enables routine absorbance, transmittance, and concentration measurements.

• Chemical Analysis: Assists in quantitative determination of suitable light-absorbing compounds.

• Pharmaceutical Laboratories: Supports spectrophotometric testing of compatible raw materials and formulations.

•  Environmental Testing: Facilitates UV-visible analysis of suitable water and environmental samples.

•  Industrial Testing: Provides optical measurement capabilities for raw material inspection and product quality control.

• Research Institutions: Supports qualitative spectral evaluation, quantitative analysis, and experimental investigations.

EV-2800 vs. Double-Beam UV/VIS Spectrophotometers

Note: Actual performance depends on the instrument configuration and measurement conditions. The comparison reflects general optical system differences rather than a universal performance ranking.

Frequently Asked Questions

1. What is the EV-2800 Single Beam UV/VIS Spectrophotometer used for?

It is designed for qualitative and quantitative spectrophotometric analysis, including absorbance, transmittance, and concentration measurements in laboratory and industrial environments.

2. What is the wavelength range of the EV-2800?

The instrument covers 320–1100 nm, supporting measurements in the visible and near-infrared regions.

3. What is the spectral bandwidth of the EV-2800?

It has a fixed spectral bandwidth of 1.8 nm, suitable for many routine spectrophotometric applications.

4. Does the EV-2800 support automatic wavelength adjustment?

Yes. It features automatic wavelength setting with a resolution of 0.1 nm, along with automatic blanking.

5. Which light sources are used in the EV-2800?

The instrument uses tungsten and deuterium lamps to provide light across its operating wavelength range. Both lamps are pre-aligned and can be controlled independently.

6. Can the EV-2800 measure sample concentration?

Yes. It supports concentration readings and quantitative analysis, including standard curve-based methods when configured for the relevant analytical procedure.

7. What data communication options are available?

The EV-2800 provides USB and RS232 ports and supports mini serial and PC printers. Optional PC scanning software is available for additional spectral analysis.

8. What types of cuvettes can the EV-2800 accommodate?

Its sample compartment accommodates cuvettes with optical path lengths from 5 to 100 mm, allowing flexibility for different sample measurement requirements.

9. What is the difference between a single-beam and double-beam spectrophotometer?

A single-beam spectrophotometer measures the reference and sample in separate measurement steps, while a double-beam instrument compares sample and reference optical paths. The EV-2800's single-beam design is suitable for routine analysis where straightforward operation and appropriate blank measurement are sufficient.