PROBLEM TO BE SOLVED: To provide emitters that can quantitatively discharge an irrigation liquid not only when the pressure of the irrigation liquid is high but also when it is low.SOLUTION: An Emitter consists of an emitter body, a film, and a cover. The emitter has a water intake part, a discharge part, a first flow pass, a second flow pass, a flow rate reduction part, a flow pass-opening and closing part, a decompression flow pass, and a bypass flow pass. When the pressure of the irrigation liquid flowing in a tube is less than a first pressure, the irrigation liquid taken in from the water intake part is introduced into the discharge part through the decompression flow pass and bypass flow pass. When the pressure of the irrigation liquid flowing in the tube is not less than the first pressure, the second flow pass is closed by the flow pass-opening and closing part and the irrigation liquid taken in from the water intake part is introduced into the discharge part through the decompression flow pass.SELECTED DRAWING: Figure 8【課題】灌漑用液体の圧力が高圧の場合だけでなく低圧の場合であっても、灌漑用液体を定量的に吐出できるエミッタを提供すること。【解決手段】エミッタは、エミッタ本体、フィルムおよびカバーから構成される。エミッタは、取水部、吐出部、第１流路、第２流路、流量減少部、流路開閉部、減圧流路およびバイパス流路を有する。チューブを流れる灌漑用液体の圧力が第１圧力未満の場合、取水部から取り入れられた灌漑用液体は、減圧流路およびバイパス流路を通って、吐出部に導かれる。チューブを流れる灌漑用液体の圧力が第１圧力以上である場合、流路開閉部により第２流路が閉塞され、取水部から取り入れられた灌漑用液体は、減圧流路を通って吐出部に導かれる。【選択図】図８
