automatic sampler meaning

• [Mechanical engineering]
  "A mechanical device to sample process streams (gas, liquid, or solid) either continuously or at preset time intervals."

• sampler:    Noun: sampler  ...
• bottom sampler:    [Engineering]Any i ...
• composite sampler:    [Engineering]"A hy ...

Examples

1. standard guide for sampling wastewater with automatic samplers
2. petroleum liquids-automatic pipeline sampling-statistical assessment of performance of automatic samplers determining the water content in hydrocarbon liquids