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Electric water level probe

tape measure with an electrical contact at its end to measure the depth of the water level in wells etc.

Pronunciation
/əˈlɛktrɪk ˈwɑdər ˈlɛvəl proʊb/
/ɪˈlɛktrɪk ˈwɔːtə ˈlɛvəl prəʊb/