Identify Semi-Volatile Compounds in Real-Time

The mobile environmental dust monitor EDM 365-SVC is a high-tech stand-alone system for simultaneous measurement of the dust mass fractions PM10, PM2.5, PM1 and the particle size distribution in 31 isze channels.

The unique feature of this instrument is the real-time detection of airborne Semi-Volatile Compounds. For this purpose, the EDM 365-SVC is equipped with a unique dual sampling system consisting of two sampling lines:

1) isothermal Nafion dryer
2) thermal evaporator

By alternating between the isotherm sample pipe to the heated sample pipe the SVC share within the total dust can be determined.

The outdoor weather protection housing is thermo-isolated with an automatic heating and proportional ventilation.


  • real-time measurement of PM10, PM2.5, PM1, total counts (TC), and particle number distribution
  • measurement of SVC ratio
  • dual sampling system with isothermal Nafion dryer and thermal evaporator
  • no radioactive source, insensitive to vibrations
  • fully automated with remote access
  • low maintenance, no consumables
  • versatile data acquisition and communication (GSM data logger)
  • self-test of all optical and pneumatic components for high quality standards
  • rinsing air for protecting laser and detector in optical cell
  • meteorological sensors for additional information
  • total inlet flow analyzed in optical cell
  • excellent counting statistics and reproducibility at low and high dust concentrations
  • stainless steel housing for continuous use in the harshest environments



  • evaluation of SVC ratio in PM mass fractions
  • investigation of aerosol formation processes
  • contribution of gaseous precursors on secondary PM
  • effect of SVC on particle number size distribution
  • aerosol science

Technical Data

measurement data

PM10, PM2.5, PM1, particle number concentration and size distribution

With and without SVC ratio

particle size range

0.25 - 32 μm

size channels


particle number

0 - 3 000 000 particles/liter

dust mass

0 μg/m3 ... 100 μg/m3


>97% of total measuring range

sampling inlet - Dual sampling system
- isothermal humidity extraction with Nafion and heated
  SVC evaporator
- selectable intervals for sampling lines

particle detection principle

light scattering at single particles with diode laser; detection volume aerodynamically focused, no border zone error


fast signal processing, 2 x 16 raw data channels

time resolution

selectable storage intervals 6 s, 1, 5, 10, 15, 30, 60 min

sample flow rate

1.2 L/min, ± 3% constant due to self-regulation

rinsing air

0.4 L/min, protection of laser optics, reference air for self-test


keypad, data logger or PC with GRIMM software or HyperTerminal


Ethernet & GSM via data logger, RS-232

analog input

1 port (0 - 10 V) for auxiliary sensors

digital input

1 port for sensors 157L, 158L, 159L (see accessories)

power supply

85 ... 264 VAC, 47 ... 63 Hz

power consumption

Pmax = 300W, Imax: 1.4 A

temperature range

-20 to +40°C (-4 to 104°F), rH <95% non-condensing

transport and storage:
-20 ... +50°C (-4 ... 122°F), rH <95%

absolute pressure range

900 - 1100 mbar
adjustable sample flow rate at high altitudes >2000 m


48.9 x 70 x 27.1 cm (19.3 x 27.6 x 10.7 in) without sample pipe
dual sample pipe: 140 x 14 cm (55.1 x 5.5 in)

total: 210 x 48.9 x 27.1 (82.7 x 19.3 x 10.7 in)


housing with spectrometer: 36 kg (79.4 lbs)
dual sample pipe: 10 kg (22.0 lbs)

total: 46 kg (101.2 lbs)



GRIMM software


GPS sensor


sensor for temperature, relative humidity, and barometric pressure


sensor for temperature, relative humidity, barometric pressure, wind speed, and wind velocity


sensor for temperature, relative humidity, barometric pressure, wind speed, wind velocity, and precipitation


Data logger for our measurement equipment including the capability to transmit all data live via GSM onto a password-protected platform

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