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MIE DATARAM 4000 Thermo Scientific Get Quote



The DataRAM 4 (Model DR-4000) continuously monitors the real-time concentration and median particle size of airborne dust, smoke, mist, and fumes. In addition, air temperature and humidity are displayed. With appropriate particle discriminators it provides measurements correlated with PM10, PM2.5 and respirable fractions. Its patented two-wavelength particle detection system provides the volume median particle diameter of the sampled aerosol, over a concentration range of up to 400 mg/m3. Unlike typical particle counting devices, the DR-4000 is totally immune to particle coincidence errors, even at the highest concentrations. Volume median particle sizes down to 0.05 micron can be measured by this unique spectral nephelometric technique. This patented technique provides a continuous measurement of PM 2.5, independent of particle size and moisture- without heating, diffusion drying, or denuding the sample stream.

Key Features

  • Selectable alarm levels with built-in audible signal as well as switched and signal outputs, RS-232 and RS-485 communications ports, and a programmable analog (voltage and current) concentration output
  • Stored information includes individual point averages, particle size, temperature and humidity with time information as well as overall average and maximum concentration and tag numbers
  • Covers a wide measurement range from 0.0001mg/m3 (0.1µg/m3) to 400mg/m3, a four million-fold span ranging from very clean air to air with extremely high particle concentrations
  • Instrument automatically checks its own optical background during the zeroing sequence and indicates any significant deviations requiring maintenance
  • Powered by internal rechargeable battery or by an AC power supply/charger (included)
  • Designed for portable operation, as well as unattended fixed-point operation
  • Compact, rugged, and totally self-contained
  • Monitors mass concentrations of fine particulate (PM 2.5)
  • Complete, large-capacity (50,000 data point) internal datalogging capabilities with data retrieval on screen or through an externally connected computer
  • Datalogging for work-shift monitoring

Technical Specifications

Range 0.0001 to 400 mg/m3 (autoranging)
Accuracy +/- 2% of reading
Particle Size Range Maximum Response 0.1 to 10µm
Sample Flow Rate 1.0 to 3.0 liters/minute
Datalogging 50,000 data points in up to 99 data goups
Output RS-232/RS-485 port
Power Sealed lead-acid battery, up to 20 hours operation, or AC operation with adapter


  US Metric
Dimensions 6.54 x 8.90\" x 12.87\"\" 166 x 226 x 327 mm


  US Metric
Weight 12 lbs 5.44 kg

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