Low-Volume Wetted-Wall Air Sampler

SASS 2400 Wetted-Wall Air Sampler

The SASS® 2400 LV air sampler is our smallest wetted-wall aerosol particle collection system. It is designed to operate with a much lower air flow and fluid sample volume than the SASS 2300, while still employing the highly successful wetted wall aerosol collection strategy that has received U.S. Department of Homeland Security Certification under the U.S. Safety Act of 2002.

The cyclone used in the SASS 2400 operates at a 40 LPM air processing rate and requires only 1 ml of fluid, whereas the larger SASS 2300 processes 325 LPM of air and requires 4 to 5 ml of sample fluid. Water loss through evaporation is correspondingly reduced. Makeup water sources will last longer, or can be reduced in size.

Extremely long collection periods continue to be a product highlight — sample fluid is maintained at a constant amount independent of collection time, ambient air temperature, or relative humidity, providing unsurpassed monitoring capabilities in environments ranging from farmyards to hospitals to battlefields.

World Class Sampling Performance

  • Features
  • Applications
  • Specifications


Product Features

  • 40 LPM wetted wall cyclone
  • An onboard sample vial filling station
  • A water reservoir sufficient for 7 days of operation
  • Makeup water metering via onboard peristaltic pump
  • Peristaltic pump/pinch valve-based fluid sample routing
  • Impact- and water-resistant case
  • Convenient tube stub inlet and threaded outlet port
  • Firmware upgradeable/customizable via the RS-232 port
  • 30,000 hour blower



  • UAV's (Unmanned Aerial Vehicles)
  • Agriculture
  • Indoor air quality
  • Environmental
  • Homeland security
  • Mailroom



Operating principle: Multi-stage wetted-wall cyclone with enhanced particulate collection.
Air collection rate: 40 LPM, nominal, when operating at a liquid charge of 1 cc.
Particulates collection range: 1-10 µm.
Concentration ratio: 40,000/min., nominal.
Liquid inventory: 1 cc, nominal, adjustable by user. Proprietary control loop maintains a constant liquid volume in the sampler, independent of collection time, temperature or humidity.
Make-up water: 1.3 liter on-board reservoir; supplemental off-board reservoirs may be used in fixed installations: 0.1 cc/min typical evaporation rate at 20°C/50% RH.
Physical size: 18.4 cm x 21.3 cm x 34.3 cm (7.2" W x 8.4" D x 13.5" H).
Weight: 3.7 kg without battery, 4.7 kg with battery (8.2/10.4 lbs). Add 1 kg (2.2 lbs) for 1 liter of water.
Air inlet connection: 15.4 mm diameter tube stub. It is recommended that third-party accessories have an airflow channel of comparable diameter or larger.
Air outlet connection: Industry-standard threaded adapter. It is recommended that third-party accessories have an airflow channel 2.54 cm diameter or larger.
Humidity Operating Range: Non-condensing conditions.
Temperature Operating Range: Above freezing conditions to 66° C
Power source: 15 VDC BA-5590/U primary battery, UBI 2590 rechargeable battery, or 82-265 Volt (47-63 Hz) AC transformer for mains power.
Baseline power consumption: 15 V @ 0.6 A, 9 W
Sample extraction: On-board 12 cc/min peristaltic pump, manual or remotely controlled. Vial filling module included. Air sampling may continue during extraction.
System controls: Microprocessor controlled. RS-232 or optional wireless link for remote operation or reprogramming. Additional TTL and motor drivers available.
Sound level: 70 dB (A) at 1 meter
Package: Lightweight two-piece molded plastic shell with swivel-style carrying handle.
Accessories: Carrying case; inlet hose; inlet screen; sample bottles; rechargeable battery and charger; RF link.
Approvals: U.S. Dept. of Homeland Security certified under U.S. Safety Act of 2002

CBRN International reserves the right to change specifications without prior notice.