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Labomed Inc.

Visible Spectrophotometer
Spectro 20D
Plus RS-232


Spectro 20D Plus RS-232C is a traditional analytical device used in small and educational laboratories.  This spectrophotometer delivers enhanced ease-of-use, precision and accuracy resulting in time and cost savings, as well as unprecedented confidence in test results. Spectro 20D Plus RS-232C has spectral bandwidth of 6.0 nm.  This instrument has a single cell holder for test tubes and two adapters for 10 x 10 mm cells.  Spectro 20D Plus RS-232C is lightweight and compact with a continuous wavelength from 320 to 1000nm.  Equipped with a microprocessor, this instrument is ideal for small laboratories and educational institutions. Spectro 20D Plus RS-232C offers ease of use and reliability which can be used in various applications. Spectro 20D Plus RS-232C can be used extensively for qualitative and quantitative analysis.

Spectro 20D Plus RS-232C is a versatile digital spectrophotometer with a built-in RS-232C port permits the instrument to be linked to a computer and a printer to display the photometric and spectral data on the PC monitor.  This interface provides easy communication between the spectrophotometer and the Window based PC.

Spectro 20D Plus RS-232C utilizes soft keys for user-friendliness; with buttons to access settings such as absorption, transmission, concentration and factor, adjusting 0A and 100%T.  Spectro 20D Plus RS-232C is able to send data to the computer or print directly from the Spectro to an external printer. 

This Spectro can be used by itself or linked to a PC.

Labomed, Inc. is certified by
ISO 9001-2013, has CE Conformity and is FDA Licensed.



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  • Microprocessor controlled.

  • Large Digital LCD Display.

  • Auto transmission, absorption, concentration and factor.

  • Silicon Photodiode detector

  • It can use square or round cells.

  • Interface RS232 to link to a computer.

  • Wide continuous wavelength range.

  • Built in stray light filter.

  • 1200 /mm. grating mirror.

  • Computer System is optional (NOT INCLUDED).

  • Can use 13mm. test tube.


Included Accessories

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  • 2 adapters for 10x10 mm. square cells

  • 2 optical glass cells 10x10 mm.

  • Instruction Manual.

  • 1 Zero absorption cell.

Optional Accessories

  • Set of 2 performance testing filters (1 "E filter" for photometric accuracy test
    and 1 didymium filter for wavelength accuracy test)

  • External printer

  • RS232 interface cable

  • Software for Windows 95/98/XP/7. Includes RS232C cable and operator's
    manual (Specify: Spectro SC)

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Technical Specifications

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Wavelength Range: 320-1000nm.
Spectral bandwidth: 6nm.
Data Processing: Microprocessor
Wavelength Accuracy: +- 1nm.
Wavelength Repeatability: +- 1nm.
Optical System: Grating, 1200 lines/mm.
Stray Light: <-0.5%T at 340 nm & 400nm.
Display: 3.5 LCD
Photometric Range:


Zero & Blank set: Automatic
Photometric Accuracy: +- 1%T
Drift: -<0.003 A/hour after warming up
Detector: Silicon Photodiode
Light Source: Tungsten Halogen lamp, 6V 10W
Sample Volume: 0.4ml (minimum)
Sample Container: Round and Square cuvette
Data Output: Analog output, RS 232C interface, Printer (SEIKO dpu-414)
Power Requirements: 110-240V. AC, 50/60Hz., Selected automatically

330 (W) x 130 (H) x 270 (D) mm.

Net Weight: 5.2 kg.

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Labomed Inc.

Labomed, Inc. Mailing Address: 2728 S La Cienega Blvd.

Los Angeles, CA 90034 U.S.A

TEL (310) 202-0811 FAX (310) 202-7286

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