Probe Material:stainless steel Wire Length=2m / 78.74inch Install with other instructions: 1, in order to ensure the normal operation of the liquid level controller, please check the input and output wiring again after installation, whether the probe cable is reliable or not. Move the probe up and down to bring it into contact with the water and simulate whether the water controller is installed correctly and can work according to your needs. 2, it is recommended to fix each point of the probe in the for tank wall, so as to avoid displacement of the probe position lead to malfunction of the water level controller (if the pool wall is metal, in addition to the ground outside the C point should not be connected to the wall to avoid short circuit, Controller does not work). 3, according to the above connection method is connected, check the right side of the product "manual / automatic" switch (DF-96D none), whether it can be manually according to user needs to open and close the pump, use it to adjust back to "automatic" position , Water level controller into working condition. 4, the temporary need to open, turn off the pump, please use the left side of the water level controller "manual / automatic" switch control (DF-96D) type without manual switch. 5, to avoid malfunction, do not install the product in humid, corrosive and high metal content of the gas environment. Package include: 3 pcs Water Liquid Level Sensor Probes