DF-96ED automatic level controller 10A 220V detector sensor with 3 probes . Features: Made of high-quality material, sturdy, and wide power range, they serve you for a long time. Automatically controls the water tank, drainage and effective water level of the pool to prevent water from overflowing or pumping idle. With full water or no protection, this controller protects the pump from burning. It also controls the upper and lower pools simultaneously. The slide mounting can be installed in the distribution box for quality assurance. There are 3 probes at guests' disposal that are easily adjusted according to demand to realize the water level control. Great for water projects, printed and dyed, chemical, food, beverage, wine, sugar and other industries.1 automatic water level controller, other accessories show in the picture are not included! Specification:Model: DF-96EDContardial: Fireproof Size: app.88 x 49x67mm/3.46x1.93 x 2.64inWorking Voltage: 220V Temperature: 30AMocal: 2WColor: As the picture shownQuantity: 1 setInstructions:1. Upper Pool Installation with Single Control (Water Storage): A (red wire) is the highest water level in the upper pool. When the water level reaches a point, the probe connects to the water, and the controller automatically shuts down the pump. B (blue wire) is the lowest water level in the upper pool. When the water level is below point B, the probe disconnects from the water and the controller automatically turns the pump on for water supply. C (black wire) is the ground wire located at the lowest part of the pool, but not at the bottom. It is recommended that the ground wire be placed below point B in the metal water tank. (The probe should stay away from the tank wall.)D (green wire) and E (yellow wire) are connected to C (black wire).2. Single Pool (Drain Water) Installation: E (Yellow Wire) is the highest water level in the pool. When the water level reaches the E point, the probe connects to the water and the controller automatically shuts down the pump to drain the water. D (green wire) is the lowest water level in the pool. When the water level is lower than point D, the probe disconnects from the water and the controller automatically turns on the pump to stop the water drainage. C (black wire) is the ground wire located at the lowest part of the pool, but not at the bottom. It is recommended that the ground wire be placed below the D point in the metal water tank. (The probe should stay away from the tank wall.)A (red wire) and B (blue wire) are disconnected.3. No water protection installationC and D is the lowest water level in the pool. When the water level reaches the lowest level, C or D disconnects from the water, the controller automatically shuts off the pump. E (yellow wire) and C (black wire) are short circuits. A (red wire) and B (blue wire) are disconnected.4. Joint Up and Down Pool Installation ControlA (red wire) is the highest water level in the upper pool. When the water level reaches a point, the probe connects to the water, and the controller automatically shuts down the pump. B (blue wire) is the lowest water level in the upper pool. When the water level is below point B, the probe disconnects from the water and the controller automatically turns the pump on for water supply. C (black wire) is the ground wire in the upper and lower pools, located at the lowest part of the pool, but not at the bottom. It is recommended that the ground wire be placed below point B, D in the metal water tank. (The probe should stay away from the tank wall.)D (green wire) is the lowest water level in the pool. When the water level reaches point D, the probe disconnects from the water and the controller automatically turns on the pump to stop the water drainage. E (yellow wire) is the highest water level in the pool. When the water level reaches the E point, the probe connects to the water and the controller automatically shuts down the pump to drain the water. Note: No retail package. Please allow 0-1cm error due to manual measurement. Pls make sure you don'tmind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1 x Automatic Water Level Controller3 x Probe