Figure 1
Because root demand turns the PlantWatcher on and off, we say: “With PlantWatcher, the plant waters itself."  With water available, PlantWatcher stands by in the plant (Figure 1). The space age sensor, (Figure 2) is in contact with the soil constantly measuring soil moisture. Moisture decreases as the roots suck water out of the soil. Available water in the soil migrates toward the roots and sucks water out of the sensor by capillary action. When water is removed from the sensor, air can flow through the sensor and allow water to slowly drip out of the PlantWatcher. In other words, the sensor is an air control valve.

 

The release of water by air is the same principle that exists when water is held suspended in a straw by the finger tip. When the finger tip is removed, the incoming air allows water to flow out of the straw. If the finger tip is reapplied before all of the water runs out of the straw, the flow is stopped and the straw will hold the remaining water until the finger tip is again removed.

 

The outlet drip point at the end of the water delivery tube (water director) is placed near the center of the root system. PlantWatcher is installed in the soil about 3 to 5 inches away from the drip point. The water coming out of the PlantWatcher wets a surface circle of 6 to 10 inches (15 to 25 centimeters) diameter. Also, gravity and the soil particles take the water deep down into the soil.  As water is released at the end of the delivery tube, it migrates toward the sensor and when it contacts the sensor, it shuts air flow off and therefore stops the water flow. This on and off cycle, triggered by the needs of the roots, continues supplying water precisely as needed. Only PlantWatcher provides for alternate wetting and drying of the soil, simulating nature, and allowing the roots to breathe oxygen. Oxygen is very important for growth in the synthesis of potassium and phospates.

 

The unit automatically compensates for various types of soil, humidity, the needs of the plant and other ambient conditions such as sunlight because it is controlled by the demands of the root system.  As a result, plants grow in a more healthy way, free from the stress of over or under watering. The plant care-giver enjoys many benefits. The guess work and concern of when to water is never an issue. Vacations and time away from the plant can be worry free because plants are watered automatically in a timely and most healthy way.  Patents are pending. 

 

Figure 2

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