Which sampling device allows for sampling without a pump?

Which sampling device allows for sampling without a pump?

• A. Adsorption Tubes
• B. Passive Dosimeters
• C. Filter Cassettes
• D. Personal Air Sampling

Answer: (B)

Sampling without a pump relies on diffusion: contaminants move to a collecting medium along a concentration gradient over time. Passive dosimeters are designed around this principle, allowing them to be placed in the worker’s breathing zone or in the work area and to accumulate contaminants without any powered airflow. They provide an integrated exposure over the sampling period and require no pump or electricity. The other devices rely on actively pulling air through a sorbent or filter with a pump, or are used in configurations that require a pump to collect samples; adsorption tubes typically need a pump to draw air through the sorbent, filter cassettes require air to be drawn through to capture particulates, and personal air sampling usually uses a pump attached to the worker for time-resolved sampling. Thus, the device that allows sampling without a pump is the passive dosimeter.

Sampling without a pump relies on diffusion: contaminants move to a collecting medium along a concentration gradient over time. Passive dosimeters are designed around this principle, allowing them to be placed in the worker’s breathing zone or in the work area and to accumulate contaminants without any powered airflow. They provide an integrated exposure over the sampling period and require no pump or electricity. The other devices rely on actively pulling air through a sorbent or filter with a pump, or are used in configurations that require a pump to collect samples; adsorption tubes typically need a pump to draw air through the sorbent, filter cassettes require air to be drawn through to capture particulates, and personal air sampling usually uses a pump attached to the worker for time-resolved sampling. Thus, the device that allows sampling without a pump is the passive dosimeter.