Condensation Particle Counters

The Air and Space operations local/regional, air quality assessment capability is anchored on highly specialized and continuous measurement of nanometer sized, and larger, atmospheric aerosols, whether from the ground or by way of airborne platform (i.e. small unmanned air vehicle). This capability is met using “nano” condensation particle counters (CPCs).

The following specification lists the minimum requirements for the capability:

1. Condensation aerosol growing agent shall be distilled or ultra-pure water
2. Continuous, 24/7 operation, capable of operating in remote location without having to replenish / re-fill water condensation agent for extended periods with standard reservoir
3. Remove and replace the internal wick—holds condensation agent—no more frequently than once every nine months
4. Tippable; CPC capable of operating in highly dynamic environment, functions to counting efficiency specification:
a) Continuously when operating within 45 degrees of upright;
b) at least 20 min continuously when operating beyond that range of orientation, including fully inverted
5. Counts aerosol particle in the atmosphere and determines concentrations with sizes ranging from as small as 5 nanometers to as large as 2.5 micron diameter
6. Count/concentration accuracy: +/- 10%
7. Broad aerosol particle concentration range: capable of single particle counting to at least 100,000 aerosol particles/cm3 and includes continuous live-time coincidence correction
8. Operating, ambient temperature range: 100 to 350C
9. Operating, ambient relative humidity range: 0 to 95%
10. Built-in ethernet capability as well as RS-232 and USB interface
11. Option to run on battery power for up to 8 hours
12. Minimal logistics footprint: weighs less than 5kg (excluding battery and power cord); battery weighs less than 1kg; occupies less than 25x25x25 cm^3 (i.e. 10in^3), including water reservoir;
13. Data output / Data Averaging: 1 to 100 seconds
14. System control and data storage/processing software, designed for use with Microsoft® Windows operating systems, to simplify set up, operation, data collection, and analysis
15. Quantity: Ten (10) systems

Please see the SOW for further details.