1405-D TEOM™, Continuous Dichotomous Ambient Particulate Monitor

1405-D TEOM™, Continuous Dichotomous Ambient Particulate Monitor

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Simultaneously measure PM Fine (PM-2.5), PM Coarse, and PM-10 mass concentrations with the Thermo Scientific™ TEOM™ 1405-D Continuous Ambient Particulate Monitor. This monitor utilizes a tapered element oscillating microbalance (TEOM) for measurements with excellent short-term precision.



Consisting of a TEOM mass sensor and control unit in a network ready configuration, the TEOM 1405-D distinguishes itself from other PM measurement methods by utilizing a direct mass measurement that is not subject to measurement uncertainties found in other surrogate technologies. It provides a self-referencing, NIST traceable direct mass measurement.Key Features:

  • Compact, stand-alone unit which utilizes a virtual impactor to measure PM Fine (PM-2.5) and PM Coarse concentrations with the ability to output PM-10
  • Design meets US and International Particulate Monitoring Regulations
  • Touch-screen GUI interface quickly and intuitively accesses system status, TEOM data, settings, and instrument conditions
  • Service screen provides access to software wizards which walk the user through calibration and maintenance procedures with detailed instructions and pictures

Standard System Configuration:

  • TEOM sensor and control unit housed in a single compact enclosure
  • A unique virtual impactor for dichotomous operation
  • Menu-driven software for user interaction via a touch-screen display
  • ActiVol flow control using Automatic Mass Flow Controller(s) and supplied Ambient Temperature and Ambient Pressure Sensors
  • ePort software for local or remote communication, USB port for automated download
  • Configuration for simultaneous output of PM Fine (PM-2.5), PM Coarse and PM-10

Filter Media:

  • Sample Filter: Pallflex TX40, 13mm effective diameter


  • Connecting and interface cables and vacuum pump
  • Consumables for average first year’s operation (ambient)
  • Pallflex TX40 Filter, 13mm effective diameter

Compatible with:

  • Streamline Pro MultiCal System
  • Complete Outdoor enclosure

Recommended for:

  • Air quality monitoring networks, including background sites
  • Special studies and supersites
  • Routine input for air quality index