Water level and temperature sensor

The utility model relates to a simple and practical water level and temperature sensor for a solar water heater, which is composed of a water temperature probe and a water level probe. The utility model is characterized in that a temperature sensitive element of which the periphery is filled with silicone grease is embedded in a water pipe joint from outer side and does not contact water, one end of the joint is connected with an aluminum plastic pipe in which a magnetic core buoy is arranged, a plurality of magnetic sensitive rings each of which is formed by connecting 3 to 5 dry reed pipes with resistors of different resistance values in parallel are arranged outside the pipe, the magnetic core buoy follows the rise and the fall of the water surface height to act on the magnetic sensitive rings, and then, the water surface height can be determined. The sensor has the advantages of simple structure, no water corrosion, scale deposit prevention, stable and reliable performance, long service life, adjustable test point height and number, convenient and flexible use and no water tank size and type limitation, and is especially suitable for matching with the solar water heater to use.