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Condensation particle counter CPC 5421 CEN
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Condensation particle counter CPC 5421 CEN

GRIMM CPC 5421
19" condensation particle counter

CPC in 19” rack design available as CPC 5421 CEN with a D50 of 10 nm for full compliance with the EN16976 for 24/7 real-time monitoring of UFP in ambient air, or the standard calibrated model CPC 5421 with a D50 of 4 nm.


Functionality: Condensation particle counter

  • Precise nanoparticle counting: n-Butanol based CPC
    • Standard version: D50 = 4.0 nm
    • CEN-compliant version to EN 16976: D50 = 10 nm
  • Droplet size control
  • Single count mode up to 150,000 particles/cm3
  • Photometric mode up to 107 particles/cm3
  • Integrated sample pump
  • Flow rate controlled by critical orifice
  • Saturator shutter
  • Long-term butanol and condensate tanks

  • Harmonized UFP monitoring
  • Easy integration in measurement stations
  • No external vacuum required
  • Unattended 24/7 operation for up to 6 weeks (0.3 l/min sample flow rate version)
  • Prompt transport without butanol drying

  • Regulatory monitoring, e.g. governmental networks
  • Compliant for use in ACTRIS  
  • Fundamental aerosol research
  • Environmental aerosol research
  • Nanotechnology process monitoring
  • Studies on atmospheric nucleation
  • Nanoparticle transport  
  • CPC 5421
  • CPC 5421 CEN
Detection principleCondensation Particle Counter
Measuring variableParticle number concentration / cm³
Working fluidn-butanol (n-butyl alcohol)
Particle concentration rangeSingle count mode: Up to 150,000 particles/cm³ Photometric mode: Up to 107 particles/cm³ *
Particle concentration accuracySingle count mode: ≥ 95%Photometric mode: ≥ 90%
Data output interval1 … 90 s (user selectable)
Counting efficiencyD50 = 4.0 nm (determined with tungsten oxide particles) to greater 3 µm
Response time t10 … t90< 3 s
CPC sample flow rate0.3 l/min
Flow controlCritical orifice with stabilized temperature
Data recordingOn PC with GRIMM 5475 nanoSoftware, on USB flashdrive or direct USB / RS-232 read-out
ConnectivityUSB, USB flashdrive, RS-232, analog input for meteorological sensors, analog pulse output
Power requirements110 … 240 VAC; 50 / 60 Hz; maximum 130 W
Ambient aerosol conditionsTemperature: -20 … 40 °C (-4 … 104 °F)Humidity: 0 … 95 % RH, non-condensingAbsolute pressure range: 500 … 1,100 mbar
Transport and storage0 … 50 °C (32 … 122 °F), RH < 95%
InstallationIn 19ʺ instrument rack**Indoor or outdoor*** protected environment Temperature: 20 … 30 °C (68 … 86 °F)Humidtity: 0 … 95% RH, non-condensing
Dimensions (h x w x d)19″, 22 x 48 x 41 cm (8.7 x 19 x 16 in)5 height units 19ʺ
Weight16.2 kg (35.7 lbs)

* For short-term measurements
** Requires 19ʺ rack rails
*** Outdoor installation requires weather protection shelter


Detection principleCondensation Particle Counter
Measuring variableParticle number concentration / cm³
Working fluidn-butanol (n-butyl alcohol)
Particle concentration rangeSingle count mode: up to 100,000 particles/cm³ (0.6 l/min sample flow); up to 150,000 particles/cm³ (0.3l/min sample flow)Photometric mode: Up to 107 particles/cm³ *
Particle concentration accuracySingle count mode: ≥ 95%Photometric mode: ≥ 90%
Data output interval1 … 90 s (user selectable)
Counting efficiencyD50 = 10 ± 1 nmD90 = ≤ 20 nm
Linearity slope1 ± 0.05
Response time t10 … t90< 2 s (0.6 l/min sample flow)< 3 s (0.3 l/min sample flow)
Sample inlet pipeNafion® based dryerDrying of aerosol flow to ≤ 40% RHMaximum particle losses ≤ 25% at 10nm
Total inlet flow rate1.8 l/min (through sample pipe)
CPC sample flow rate0.3 or 0.6 l/min
Flow controlCritical orifice with stabilized temperature
Standards and certificatesEN 16976:2024ISO 27891:2015ACTRIS compliant instrument**
Data recordingOn PC with GRIMM 5475 nanoSoftware, on USB flashdrive or direct USB / RS-232 read-out
ConnectivityUSB, USB flashdrive, RS-232, analog input for meteorological sensors, analog pulse output
Power requirements110 … 240 VAC; 50 / 60 Hz; maximum 130 W
Ambient aerosol conditionsTemperature: -20 … 40 °C (-4 … 104 °F)Humidity: 0 … 95 % RH, non-condensingAbsolute pressure range: 500 … 1,100 mbar
Transport and storage0 … 50 °C (32 … 122 °F), RH < 95%
InstallationIn 19ʺ instrument rack***Indoor or outdoor**** protected environment Temperature: 20 … 30 °C (68 … 86 °F)Humidtity: 0 … 95% RH, non-condensing
System componentsCPC 54215438-1.5 butanol and condensate tank unit182-1.5 1.5m sample pipe
Dimensions (h x w x d)CPC: 22 x 48 x 41 cm (8.7 x 19 x 16 inch); 5 height units 19ʺTank unit: 9 x 48 x 32 cm (3.5 x 19 x 12.6 inch)

* For short-term measurement
** 0.6 L/min sample flow rate version
*** Requires 19ʺ rack rails
**** Outdoor installation requires weather protection shelter


  • Optional
665
199
180DL

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