SM-7204 Personal Silica Monitor

SM-4000 Real-Time Personal Silica Monitor The SM-4000 air sampler is mounted in the OSHA defined breathing zone allowing for a more accurate representation of workers exposure. Having a Real-Time Optical Sensor placed in the breathing zone, reduces inner wall dust deposition, experienced by other Real-Time optical devices on the market. In addition, having a gravimetric filter cassette directly behind the optical sensor allows for maximum particle deposition on the filter and thus a more accurate representation of worker exposure. The SM-4000 offers Real-Time Concentration Readings and the DustComm Software allows for graphical analysis and comprehensive time history reporting.




  • Foundry Work
  • OSHA compliance
  • Stone Cutting
  • Quarry Work
  • Tunneling
  • Rock Drilling
  • Any occupation which cuts, chips, drills, grinds silica into respirable size fractions


  • Flow compensated pump
  • An optical sensor mounted in the OSHA defined breathing zone
  • Accepts any standard 27 or 25mm pre-loaded filter cassette
  • Validated sampler meets the ISO 7708 Standard
  • Easy to clean optical sensor with calibration span verification.
  • On screen programming for creating a unique aerosol library and data sets.


Weatherproof Enclosure

Inline 37 or 25 mm preloaded filter cassette.  

Sensing Range: 1-500,000ug/m3

Flow Compensated Sampling flow rate: 1.0-5.0 LPM

Alarm output: 90 db at 3 ft

Digital Output: Micro USB

Record Time: 1 s. to 15 days

Operating temp: 0 to 50°C

Battery: 22+ hrs @ 2LPM with IOM and no filter

Weight Instrument 1.14lbs

Sensor Weight:  0.6lbs

Dimensions Instrument: 3.5″ x 2.25″ x 4.75″


Dimensions Sensor: 1.75″ x 1.5″