The structure is simple and the service life is long. It can be used for long-term use and is not easy to corrode and fall off, and it can effectively resist the scaling problem. The maintenance is very simple and easy. 1: The level sensor must be placed in the water to measure the water level. It is forbidden to directly measure the sensor and the common pole. 2: When the standard liquid level sensor is not long enough, the user can extend the wiring by himself. In order to avoid the controller failure, the selection of the extension cable should be a shielded conductor to prevent -damage. : Plumbing Product name: water level sensor Product features: high temperature 105 degrees Scope of application: solar energy, air can. Special hot nozzle colour: White + red + blue Material: ABS+stainless steel size: 1.5m,2.5m,3.5m Package Contents: 12 x Water level controller Only the above package content, other products are not included. Note: Light 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. Electrode type water level controller adopts electrode rod to form an insulating sleeve with plastic. It adopts anti-short circuit design, and will not cause malfunction due to moisture or conductivity of water tank or well wall. The conductivity of water in boiler is used, when the water level in boiler The change occurs, because the electrode rods of different lengths and different water levels contact and separate, the electrical circuit is closed or opened, and the signal of the reaction water level change is transmitted outward, and then the signal can be further processed according to the signal, the electrode type water level The sensor uses the conductivity of water as the working principle, the sensing quality is stable, it is not easy to generate false signals, and the signal of the position in the water can be reliably received and transmitted.