Hannu Mannerkoski

Käytännöllinen vedenpinnan mittauslaite

Mannerkoski H. Käytännöllinen vedenpinnan mittauslaite.

English title: An audible buzzer apparatus for indicating water-table levels

Tiivistelmä

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 1169

Saatavilla http://suo.fi/article/9569 | Lataa PDF

---