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Thermo Scientific™ Spectronic™ 20+/20D+ Spectrophotometers

A low-cost, rugged and reliable spectrophotometer for teaching and industrial labs

Includes: Both models come with a box of twelve 0.50 in. (13mm) test tube cells (Part No. 331780000), 0.50 in. (13mm) sample compartment adapter (333178000), dust cover (332961149), and user manual.

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Catalog Number Mfr. No. Description Price Qty Availability  
Catalog Number Mfr. No. Description Price Qty Availability  
Accessories View Documents
Thermo Scientific™
N/A Test volumes to 0.75mL This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000.


Single-beam units are suitable for general colorimetric and spectrophotometric applications.

System Benefits

  • Compact, lightweight design saves valuable bench space
  • 340 to 950nm wavelength range enables a wide variety of spectrophotometric analyses Simple Filter Selection Lever optimizes results with its easy use

Accessories Add Power and Flexibility

  • A variety of adapters, cuvets, and test tubes for running a diverse range of chemical tests work with the versatile instrument sample compartment
  • Sample volumes as low as 0.75mL reduce waste and lower reagent costs
  • Cell pathlengths up to 1 in. allow measurement of low absorbing samples without the additional time and cost of physically concentrating the samples


  • Includes easy-to-read digital display with direct readout in percent transmittance, units of absorbance or concentration
  • Direct Computing and Printer Interfacing reduces reading and recording error
  • Concentration Mode with automatic calculation saves time, eliminating the need to manually construct standard curves for each analysis

Academic, agricultural, environmental, food and beverage, and chemical QC labs


UL/CSA listed


Manufactured in an ISO:9001 facility.

Warranty and Services

Three years.

†Over entire wavelength range when measured with accessory filter, 14-385-132.

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