Thermo Scientific™

1405-D TEOM™ Continuous Dichotomous Ambient Particulate Monitor

 Related applications:
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.

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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
  • Remediation projects (Superfund, hazardous waste)
  • Indoor air, exposure chamber, and industrial hygiene measurements
  • In and around industrial and material handling facilities
User services

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Service offerings
Overview of all services including support plan options, repairs and calibrations, spare parts and technical training.

Factory Depot 
Request an RMA number and send your instrument to our factory for repair.


Manuals & protocols