Käytännöllinen vedenpinnan mittauslaite
Mannerkoski H. Käytännöllinen vedenpinnan mittauslaite.
English title: An audible buzzer apparatus for indicating water-table levelsTiivistelmä
The paper describes an apparatus for indicating the water level in ground water wells. It gives a sound signal whenever water completes the electrical circuit between the two leads of the probe. It is inexpensive and easy to use. The level of the water surface indicated by a piezoelectric buzzer thus leaving the user free to observe the depth scale.
Vastaanotettu 31.10.2017 Julkaistu 1.1.1983
Katselukerrat 1271
Saatavilla http://suo.fi/article/9569 | Lataa PDF