Metering device for produced fluid of coal-bed gas well

The utility model discloses a coal-bed gas well produced fluid metering device which comprises a box body and a PLC (Programmable Logic Controller), the box body is formed by combining a dry chamber and a water storage chamber; a flow monitoring loop is arranged in the dry chamber; a liquid level meter is arranged in the water storage chamber; an inlet and an outlet of the flow monitoring loop are respectively connected with the water storage chamber and the sewage pool; and the liquid level meter and the flow monitoring loop are electrically connected with the PLC respectively. The flow monitoring loop comprises a micro drainage pump and a liquid flow meter; an inlet of the miniature drainage pump is connected with the water storage chamber through a pipeline, an outlet of the miniature drainage pump is connected with an inlet of the liquid flowmeter, and an outlet of the liquid flowmeter is connected with the sewage pool. According to the utility model, the pressure type liquid level meter, the flow meter a