功能

• It is a sampler installed outside to receive rainwater and sediment. Usually, rainwater in the receiver is evaporated and separated to analyze the substances in the air. The funnel diameter is specified as 300±5 mm beca it is d uniformly for pollution surveys in factories and cities. It has a wire mesh at the top to protect the funnel and ward off birds.
• The trestle is separated vertically, so it is convenient for moving and storing.