The Compact Outdoor Nano System

Ultra-Fine Particle Counting - Continuously & Weather-Protected

The EDM 465 combines the reliable technology of our butanol condensation particle counters with easy handling and flexible application for environmental monitoring due to a compact, robust and mobile weather housing.

The EDM 465 is applicable for short and long-term continuous monitoring of ultrafine particles and enables a real-time data analysis of nanoparticles and meteorological measurement data.

This configuration places the EDM 465 in the leading position of the mobile ultrafine particle monitoring. The EDM 465 is a fit for purpose, state-of-the-art system capable of performing accurate and high-resolution measurements.


  • real-time monitoring of ultrafine particles according to CEN TS 16976:2016
  • fully automatic 24/7 monitoring system
  • low maintenance, 30 days unattended operation, remote access
  • energy-efficient sampling with isothermal drying system
  • high precision at low and high concentrations
  • excellent counting statistics and reproducibility
  • low diffusion losses
  • versatile data acquisition and communication (data logger with GSM via internet)
  • self-test of all optical and pneumatic components for high quality standards
  • rinsing air for protecting laser and detector in optical cell
  • meteorological sensors
  • instrument parameters secured against data loss


  • mobile monitoring of ultrafine particles
  • traffic emission monitoring
  • source identification
  • epidemiological health studies
  • public site and urban monitoring

Technical Data

measurement principle

condensation particle counter
working fluid n-butanol (n-butyl alcohol)

particle size range

4 nm to 1 μm (pre-impactor)

detection efficiency

D50 = 7 nm (verified with silver particles)
D90 < 14 nm

max concentration single count mode

150 000 p/cm3

max concentration photometric mode

107 p/cm3


> 95% for single particle count mode

response time trise<5 s, tfall< 5 s



sampling and conditioning

1 m sampling pipe with sampling head, isothermal humidity extraction via Nafion membrane, sensor controlled

diffusion losses

< 30% for smallest relevant particle size of 7 nm

weather housing

stainless steel, powder-coated, thermally isolated, temperature controlled

climate sensors

wind speed and direction, precipitation, pressure, temperature relative humidity; GPS positioning


pulse free carbon vane pumps, flow rate of sample air 0.3 L/min

flow control

critical orifice, temperature-stabilized

total flow rate 1.5 L/min, ≤ 5% difference to the nominal flow rate


data logger and netbook integrated in housing for online data, meteorological sensor and GPS position


data logger, USB, GSM with SIM card for mobile network

analog input

1 port (0 - 10 V) for auxiliary sensors

power supply

110 – 220 VAC, 50 – 60 Hz

power consumption

100 - 150 W

temperature range - 20 to + 40°C (-4 to104°F), RH < 95%
pressure range 500 – 1100 mbar


housing: 49 x 28 x 65 cm (19.3 x 11 x 25.6 in), total height with sampling pipe and meteorological sensor: 140 cm (55.1 in)


38 kg (83 lbs)



sensor for temperature, relative humidity, and barometric pressure

158Lsensor for temperature, relative humidity, barometric pressure, wind speed, and wind velocity
159Lsensor 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


GRIMM developed a powerful software to visualize, process, and import as well as export your valuable measurement data.
This easy-to-use program is compatible to Windows XP and all later versions.

Please contact us for your for free trial version if you already own a GRIMM measurement device or more information if you are in the process of finding your measurement solution.


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