Photoacoustic Extinctiometer (PAX)

• Measured Parameters: Absorption coefficient, Babs Scattering coefficient, Bscat
• Auxiliary Parameters: Temperature Pressure Relative Humidity
• Derived Parameters: Black carbon (BC) mass Extinction coefficient, Bext Single scattering albedo, SSA Dew Point
• Measurement Range – Absorption and Scattering: < 1 Mm-1 – 10,000 Mm-1 (870 nm, 60 sec. averaging)
• Laser: 870 nm (1.4 W) Modulation Frequency: 1500 Hz nominal, square wave
• Angular Integration for Scattering: 6° to 174°
• Sample Flow: 1 L/min Flow Control: Critical orifice Diaphragm Pump
• Response Time: < 10 sec; one-second resolution
• Data Averaging Time: 1, 10 or 60 seconds, user selectable
• Zero Check: On demand, or automated at user selectable interval at 5, 15, 20, 30, or 60 minutes. Zero check with high-efficiency filtered air sample.

Front Panel Features

• Graphical colour touch-panel display screen
• Two USB-A ports
• Power switch
• User interface via touch screen or standard keyboard

Rear Panel Connections

• Sample inlet (compression fitting for ¼” tube)
• Pump exhaust (compression fitting for ¼” tube)
• AC and DC power connections
• Serial RS-232 jack
• Ethernet port
• Two analog BNC inputs
• Four analog BNC outputs

• Data Storage Capacity: > 200 days
• Communications Output: Ethernet 100/10 Mbps, RS-232 Serial
• Power Requirements: 90 – 264 V, 47 – 63 Hz (AC Power) or 12 VDC Power Consumption 45 W
• Dimensions: 18 cm H x 48 cm W x 61 cm D; rack mountable
• Weight : 18 kg
• Environmental Operating Conditions Temperature: 0 – 40°C (32 – 104°F) RH: 0 – 90% RH non-condensing

Computer Requirements for PMC Software (Computer not included):

• Windows XP, Vista, or Windows 7
• Minimum 1GB RAM

Accessories

• Hard-shell shipping case suitable for frequent travel
• PM 1.0 cyclone inlet (1 litre/min) for particle size selection
• PM 2.5 cyclone inlet (1 litre/min) for particle size selection