Double Beam Microprocessor V-VIS Spectrophotometer 2802 Regular Model


Technical Specifications:

Optical system:

Double Beam ( 1200 Lines/nm Grating )

Wavelength range:

190 nm-1100nm

Spectral Bandwidth :

 1 nm

Scanning Speed :

Fast /Medium / low

Wavelength accuracy:

+-0.3 nm



Wavelength repeatability:

0.2 nm

Wavelength Setting:


Keyboard :

Membrane Keypad

Light Source :

Deuterium and Tungsten Lamp

Photometric accuracy:


Photometric repeatability:

0.001 Abs

Photometric Display range:



±0.0004A/h @500nm

Baseline Flatness:

±0.001 A


±0.0003 A/H

Stray Light :

< 0.02%T

Wavelength Resolution :

0.1 nm

Photometric Mode:

A, T, C

Display :

Graphic LCD (  320×240 Dots )


Silicon Photovoltaic

Interface :

USB port and parallel port

Power : 

AC 220V /50 Hz or AC 110 V/60 Hz

Dimension :

590*460*220nm (L*B*H)


25 kg

Drift : 

<= +/0.0004 A bs/h

Cell Holder :

8 cell holders



• Wide Wavelength range, satisfying requirements various fields.

• Fully automated design, realizing the simplest measurement & satisfying the requirement of pharmacopeia

• Maximum of 9 Wavelength & 8 Sample can be measured at one time

• Automatic change –over Between W lamp & D2 lamp

• Optimized optics and large scale integrated circuits design, light source and receiver

• From world famous measurement methods all add up to high performance and reliability.

• Rich measurement methods: wavelength scan, time scan, multi wavelength

• Determination, multi –order derivative determination, double-wavelength method and triple-wavelength methods etc, meet difference measurement requirement 

• Automatic 10 mm 8 –cell holder

• Data Output can be obtained via a printer port and a USB interface

• Parameters and data can be saved for user’s convenience.

• Pc controller measurement can be achieved for more accurate and flexible requirement



* Medicine/Pharmaceutical Industry

* Environmental Monitoring

* Commodity Inspection

* Food Inspection

* Agricultural Chemistry

* Teaching in Colleges & Universities

* Metallurgy

* Geology

* Machine Manufacturing

* Petrochemical Industries

* Water and Waste Water Labs

* Food and Beverage Labs


Standard Configuration

* Glass Cell : 4 nos.

* Quartz cells : 2 nos.

* Instruments Cover : 1 no.

* Software CD : 1 no.

* USB Cable : 1 no.

* Operational Manual : 1no.

* Software Manual : 1 no.

* Software key : 1no.


DOUBLE BEAM UV-VIS Spectrophotometer with more accuracy and flexible requirements. The two detectors are used to measure sample and reference respectively and simultaneously for optimizing measurement accuracy. It has wide wavelength range satisfying requirement of various fields, such as biochemical research and industry, pharmaceuticals analysis and production, education, environment protection, food industry etc.

Basic Mode
To measure the Absorbance and transmittance

1. Coefficient Method
2. Standard Curve Up to 10 Standard sample may be used to establish a curve. Four methods for fitting a curve through the calibration points :  Linear fit. Linear fit through zero, Square fit and cubic fit.

DNA/Protein Test
Concentration and DNA purity are quickly and easily calculated: Absorbance
Rations : 260 nm / 280 nm with optional subtracted absorbance at 320 nm. 
DNA concentration = 62.9XA260-36.0XA280 Protein concentration = 1552xA260-757.3xA 280

Wavelength Scan
1. The wavelength scan intervals are 0.1,0.2,0.5,1,2,5 nm
2. Hi, Medium and low scan speed are available. They vary from 100 to 3600 nm/min
3. Wavelength are scanned from high to low so that the instrument waits at high WL. And it minimizes the degradation of UV sensitive samples.

This mode may be used for time course scanning or reaction rate calculations.
Abs v/s time graphs is displayed on the screen in real time, Wait time and measurement time up to 12 hours may be entered with time interval of 0.5,1,2,5,10,30 seconds and one min. Post-run manipulation includes re-scaling, curve tracking and selection of the part of the curve required for rate calculation. Rate is calculated using a linear regression algorithm before multiplying be the entered factor.

±0.002 A