Acmevac sales offers air s sampler, which consists ofis equipped with a mini pump driven operated by a dc motor workingrunning on a 6volt rechargeable battery. These air samplers work function persistentlycontinuously for up to 10 hours between charging. If required,as per requirements the air sampler air sampler can be utilized used, while charging, on 220v ac mains supply. Screw arrangement of the acmevac air samplers providesallows variation of flow rales rates between 0.5 and 3.0 litres/ minutes. A flow meter is mounted posilioned on the face of the box and pulsation dampers are internally fitted attached on the inlet and outlet gas circuit of the air sampler to smoothen ease the airflow. The pump unit is fittedintegrated into a ms case of compact size. The air samplers from acmevac sales sampler unit can be kept placed on a flat surface for stabilityconstancy at the breathing zone level of the worker to take twa - tlv [8 hour] measurements. These air samplers from acmevac sales air sampler is furnishedsupplied with battery charger in a carrying case.