Caution: color: we ship according to the color of the first picture, in the package: if the quantity is not stated in the description, we will ship the item according to the quantity and model number in the title. Hfs-20/15/25 r3/4 liquid water oil sensor control automatic paddle flow switch 15a 250v ip54 25 the product is shipped based on the color or size of the main image of the product page. Size:25 features: this flow switch is an automatic element that controls flow in pipes, which can be used on water treatment system, central air-conditioning, water cooled chiller and relative industries. Applicable fluid includes water, ethylene glycol,oil or other liquid not classified as hazardous or corrosive. Flow control value is adjustable, repeat action point is stable. Protection grade is ip54; The contactor life is up to 100,000 times. When flow rate exceeds set value, fluid drives blade and micro switch, the spdt contact can connect a circuit and disconnect other circuit. It can not be used when fluid temperature drops below freezing point. Specifications: output form: micro switch spdt output micro switch: 15a max. , 250Vac/dc modelï¼ÂšHfs-15/ hfs-20/ hfs-25 thread: r1/2 r3/4 r1 fluid: water, oil fluid temperature: 1℃~100℃ max. Pressure: 10bar ip grade: ip54 package includes: 1x flow switch & 1 x set paddles