Compatibility: Flow Switch compatible for intellichlor salt chlorinator ic-15, ic-20, ic-40, ic-60 systems. Replace number 520736. Protect your salt and chlorine equipment They are made to last in any weather condition. Easy Connection: Flow switch with 4 button connectors, waterproof and moisture-proof, easily connect the wires at both ends. The switch come with sealant tape no leaks. The on the switch indicates the direction of the water flow to correct installation. Sensitive Detection: Red, Black/ Blue line: detect water flow. White & Green line: detect temperature. This product only solves the problem of the water flow and temperature of the Intellichlor salt system, and does not read the salinity. This will not fix a low salt reading. Easy Installation: Compatible with 2 wire, 3 wire, 4 wire cell. The wires has been strip of the flow switch. Only take several minutes make "no flow" warning light to go off. What You Will Get: You'll get 1x flow switch, 1x waterproof sealing tape, 4x button connector Colour:Photo Color Material:Plastic Package Contents: 1 set x Flow Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.