WATER HARDNESS TESTING PROBE, SENSOR, TESTING METHOD AND WATER SOFTENER

摘要

A water hardness testing probe (100), a sensor (300), a testing method and a water softener. The sensor (300) comprises a control unit (400), the control unit (400) comprising a processing module (402) and a potential testing module (401); the testing probe (100) comprises a first probe (312) and a second probe (331), when the first probe (312) and the second probe (331) are both in raw water, the potential difference between the first probe (312) and the second probe (331) being a first potential difference, and when the first probe (312) is in raw water and the second probe (331) is in softened water, the potential difference between the first probe (312) and the second probe (331) being a second potential difference; the potential testing module (401) determines a potential difference between the first probe (312) and the second probe (331); and the processing module (402) determines the water hardness of the softened water according to the difference between the first potential difference and the second potential difference. The sensor (300) can test the water hardness of the water softener in real time, and eliminate a test error caused by manufacturing and drifting of the testing probe (100).