Brass material Flow switch:on/off signal output

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{"cid":"79985","pid":"18287582","pimg_url":"\/\/img1.tradegrowthhub.com\/e3\/64\/b1595ee69e69\/product\/56738676_s-w400xh400.jpg","name":"DN32 MJ-HS32 G11\/4\" Brass Flow Switch Water Level Regulator Piston Switch Material","attrs":{"Price":"Negotiable","MOQ":"1 Piece","Delivery Time":"Negotiable","Brand":"MOJO"}}

{"cid":"79985","pid":"18287573","pimg_url":"\/\/img1.tradegrowthhub.com\/e3\/64\/b1595ee69e69\/product\/56738638_s-w400xh400.jpg","name":"Brass Material MJ-CL41C 1\/4\" Brass 8mm Tubes Magnetic Type 10% Water Flow Switch","attrs":{"Price":"$7.50(1 - 49 Pieces) $7.00(>=50 Pieces)","MOQ":"1 Piece","Delivery Time":"Negotiable","Brand":"MOJO"}}

{"cid":"79985","pid":"18287564","pimg_url":"\/\/img1.tradegrowthhub.com\/e3\/64\/b1595ee69e69\/product\/56738591_s-w400xh400.jpg","name":"MJ-0808L OD 8mm POM nylon and fiberglass food material water flow switch","attrs":{"Price":"$5.25(1 - 49 Pieces) $5.04(50 - 99 Pieces) $4.72(100 - 499 Pieces) $4.20(>=500 Pieces)","MOQ":"1 Piece","Delivery Time":"Negotiable","Brand":"MOJO"}}