DSM- Micro

DSM- Micro TM


  • Small, portable and dedicated cell density instrument
  • Instrument is powered by a rechargeable battery
  • Simple one button operation for functions
  • USB port allows easy data collection or printing results
  • Fully built-in controls and software requiring no computer for operation

Technical Information:


The DSM-Micro TM instrument is a cell density meter that is portable, light weight, easy to use and battery powered. The device functions as cell density meter for measurement of E. Coli, yeast cells and other biological agents in suspension at the 600 nm wavelength of light.

The instrument has the functions of % transmission (% T), logarithmic transmission absorption (Abs) and also provides an intervalometer for time-lapse recording. The instrument is sized to permit it to be used in smaller spaces, used in incubation chambers, anaerobic compartments or other environmentally controlled areas.

A LED provides 600 nm light that is focused to the sample via fiber optic cables to obtain the readings. A simple touch panel provides all the function buttons. The control panel with the user buttons is constructed of glass for easy wipe down and spill clean-up.

A USB 2.0 port is provided to connect to a PC.  The PC connection provides a method to input the instruments data collected for further analysis. A fully recharged battery assembly will provide 30 hours of operation free of AC power. The recharge time is 1-2 hours when the instrument is turned off.

Cleaning the instrument can be accomplished using common laboratory agents like de-ionized water, ethanol, or sterilized with formaldehyde or ethylene. Organic solvents like acetone should not be used as it may degrade the sample sites.

The DSM-Micro TM comes preconfigured to provide testing using extremely small drop 20 ul samples.


Technical Specifications

Center Wavelength CWL (nm)

600 nm 

Full Width-Half Max. FWHM (nm)

10 nm 


Optical density -0.3 to 1.99 A 


± 0.05 A at 1 A


± 0.02 A at 1 A 

Micro-Volume Pedestal

As low as 20 micro liter


USB 2.0


1000 readings 


240 x 160 graphic LCD

Power Requirements

Internal rechargeable NiMH battery or universal external power supply (wide range 110-220 V)

Approximate Dimensions

194 × 84 × 173 mm (W × H × D) 


0.8 kg 

Safety Certifications

CE, RoHS complaint