NOVELTY - The device has a coating liquid storage part (24) storing coating liquid, and a nozzle discharging coating liquid with respect to a substrate (81) i.e. glass substrate. A pipe line liquid-feeds the coating liquid with respect to the nozzle from the coating liquid storage part. A heat type flow meter is arranged by the pipe line. An air chamber (72) is positioned in a housing part (71), and accommodates the flow meter. A gas supply unit supplies gas temperature-controlled in the air chamber. A plate-shaped member (75) is positioned between a supply port and the flow meter.    USE - Device for applying coating liquid e.g. volatile solvent such as aromatic organic solvent and organic electroluminescent material, to a rectangular-shaped glass substrate for an active-matrix drive system organic electro luminescence display apparatus. Can also be used for a mask board of an LCD device, plasma display panel device, solar cell, electronic paper and a semiconductor manufacturing apparatus.    ADVANTAGE - The device allows a flow volume of the coating liquid to be measured correctly when the flow meter is used so as to control application quantity of the coating liquid in a correct manner. The device can maintain atmospheric temperature of the flow meter uniformly from the air chamber such that visibility from outside of the chamber can be improved, thus maintaining the flow meter in an easier manner. The device allows gas flow to be fixed so as to control atmospheric temperature of the flow meter in an appropriate manner. The device can prevent the gas supplied from the supply port to be blown off to the flow meter by action of a plate-shaped member, so that gas flow can be fixed to control the atmospheric temperature of the flow meter.    DETAILED DESCRIPTION - The chamber is in rectangular parallelepiped shape.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a coating liquid supply part.    Coating liquid storage part (24)    Housing part (71)    Air chamber (72)    Plate-shaped member (75)    Substrate (81)