The lower chamber encapsulates a glass cartridge which contains the Polyurethane foam for vapor entrapment. The dual chambered sampling module is designed for easy access to both upper and lower media. The threaded lower canister is removed with the cartridge intact for immediate exchange. Air flow rates are infinitely variable up to 280 liters per minute. The voltage variator adjustment screw alters the blower motor speed to achieve the desired flow rate.
Periodic calibration is necessary to maintain on-site sampling accuracy.
A seven day mechanical timer is included as standard equipment and permits weekly scheduling with individual settings for each day and 14 trippers to turn the sampler on and off. Any day or days may be omitted and day and night periods are distinctly marked. Other timers and programmers are available optionally to suit any sampling requirements.