Condensation Particle Counter 3775
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Condensation Particle Counter 3775 is a general-purpose counter that detects airborne particles down to 4 nm. It provides highly accurate measurements over a wide concentration range from 0 to 107 particles/cm3. As a result, this CPC is quite versatile and well-suited for a broad range of applications.
The successor to the Model 3022A, the Model 3775 features extended single particle counting with continuous, live-time coincidence correction for concentrations up to 50,000 particles/cm3. A photometric mode takes over at higher concentrations. The 3775 also features an improved transition between the two count modes. It has a color VGA display, anti-spill design, water-removal capability, data logging and storage capabilities with a removable memory card, and USB and Ethernet ports. It includes built-in SMPS™ compatibility and our Aerosol Instrument Manager® software.
Features and Benefits
- Lower particle detection size limit of 4 nm
- Fast response to rapid changes in aerosol concentration (T95@ 4 sec)
- Extended single particle counting up to 5 x 104 particles/cm3 with continuous, live-time coincidence correction
- Smooth transition to photometric mode counting that goes up to 107 particles/cm3
- Butanol-friendly features, including anti-spill design, water-removal system, butanol odor absorber, and improved resistance to optics flooding after tilt of instrument or inlet flow restriction
- Built-in data logging and storage capability with removable memory card
- USB and Ethernet available
- Built-in SMPS compatibility (Now standard!)
- Auto recovery from power failure
- Removable saturator wick for easy transport and maintenance
- Particle concentration, plots of concentration versus time, total counts, or instrument status shown on front-panel color LCD display
- Basic aerosol research
- Filter and air cleaner tests
- Combustion and engine exhaust research
- Health effects studies
- Inhalation and exposure studies
- Atmospheric and climate studies
- Nanotechnology research
Can the CPC be operated with different carrier gases?
Yes, but only inert gases.
Is the counting efficiency for each CPC determined individually?
No. The CPC efficiency curve has been determined by testing a statistically valid number of CPCs and averaging the results to obtain the curve published in the product literature. Variation between units is very small.
What is the final droplet size after growth by condensation?
This question has been investigated, theoretically, by Ahn and Liu (1990). For the initial particle diameters of 5 and 20 nm, the computation results show a final droplet size of 11.3 and 12.3 micrometers, respectively (Ahn and Liu, 1990). Similar experimental results have also been determined.