Our Air Samplers have been used in... Indoor Air Quality Testing Pharmaceutical Manufacturing Food Processing Plants Filter & Clean Room Efficiency Studies Animal Care Laboratories Specialty Laboratory Testing Environmental Testing	The design philosophy of the M/G Sampler is based upon drawing air through a 0.152mm slit at 1-cubic foot/minute and impinging the particles contained therein upon an agar surface 2-3mm below the slit.  The agar is contained in a commercially available 150mm x 15mm disposable culture plate which is rotated by a synchronous drive motor.  The rate of rotation can be varied by the interchangeable drive motors.  After sampling, the plate is incubated and the colonies counted.   This count reflects the number of airborne particles carrying viable organisms.   No dilution or plating steps are required.  Results are expressed as viable particles per unit of air and a time-concentration relationship may be determined.
Features of Model 220 . . . Completely self-contained Built-in vacuum pump Improved air flow gauge  and adjustment valve Convenient slit to agar depth gauge One piece aluminum throat with precision laser cut slit Drive motor of your choice Rugged aluminum housing Easily portable (weighs only 19 lbs.) On/Off toggle switch with lighted "On" indicator. Transparent Lexan leak tight sample chamber Digital display programmable timer

On operation, the pressure of the compressed gas (maximum 125 psi, minimum 5 psi) is reduced by a constant pressure reducing regulator passed through a 0.152mm slit and the resident particles contained therein impinged upon an agar surface 2-3mm below the slit.   The agar is contained in the same commercially available culture plate as described for the Model 220 above. At the conclusion of the sampling period the drive motor and gas supply shut off automatically.  The plate is then removed, incubated and the colonies counted by standard techniques.  The results may be expressed as viable particles or colony forming units per cubic foot of gas at atmospheric pressure.

Features of Model P-320 are the same as above with the exception of the following . . .

easily portable (weighs only 15 lbs.)	transparent Lexan leak tight sample chamber with
timer actuated solenoid shut-off valve	stainless steel clamps holding the dome in position at
standard 3/8" bulkhead union for adapting to your	pressures up to 125 psi
compressed gas systems