The Stand-Alone Brother of the Approved EDM180

The mobile environmental dust monitor EDM 365 was developed and designed by Grimm for the mobile industrial use. This high-tech stand-alone system EDM 365 satisfies customers world-wide with its high precision and the low maintenance and operating costs. The EDM 365 detects airborne particles in real-time without the loss of the semi-volatile compounds.

Every single aerosol particle is detected in the optical measurement cell. This precise and reliable single particle count allows for a simultaneous measurement of the dust mass fractions PM10, PM2.5, PM1 and also the particle size distribution in 31 size channels.

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


  • equivalent to norms US-EPA, UK-MCERTS, CN-CMA
  • weather-protected system in powder-coated stainless steel housing
  • continuous use in harshest environments
  • real-time measurement of PM10, PM2.5, PM1, total counts (TC), and particle number distribution
  • fully automated monitoring system with remote access
  • extremely energy-efficient, low maintenance, no consumables
  • no loss of semi-volatile compounds
  • no radioactive source, insensitive to vibrations
  • 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
  • temperature and relative humidity sensors
  • total inlet flow analyzed in optical cell
  • excellent counting statistics and reproducibility at low and high dust concentrations


  • Continuous PM measurements where no container can be placed
  • AMS for PM networks
  • Industrial surveillance
  • epidemiological studies
  • monitoring of construction and mining sites

Technical Data

measured mass fractions

PM10, PM2.5, PM1

particle size range

0.25 - 32 μm

size channels


particle number

0 - 3 000 000 particles/liter


>97% of total measuring range

detection principle

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

optical cell

diode laser 660 nm


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

sampling inlet

isothermal humidity extraction via Nafion membrane, sensor-controlled, without loss of semi-volatile compounds (SVC)


keypad, data logger or PC with GRIMM software or HyperTerminal


Ethernet & GSM via data logger, RS-232 (GESYTEC)

analog input

1 port (0 - 10 V) for auxiliary sensors

digital input

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

power supply

in: 230 V/50 Hz; optional 115 V/60 Hz

power consumption

Pmax = 150 W, Imax: 1.4 A

temperature range

-20 to +40°C (-4 to 104°F), non-condensing

absolute pressure range

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


48.9 x 70 x 27.1 cm (19.3 x 27.6 x 10.7 in) without sample pipe


36 kg (79.4 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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