pressure switches / pressostate

The 2 differnt types i bought and i have no idea how they really work, but with the help of the internet I found out that one of them is  from a dishwasher and not from a washing machine. With a multimeter I made a continuity tests and it looks like that one is having 1 trip points and the other is having 2 trip points.

With the contiuty test you can test the pins how they respond and if the work.  You just have to measure two  pins and them blow into the switch, if the switch works you hear a click from the switch and the continuity will change from 1 to a 3 digit number and vice verce. Those pins will later be connected to the solenoid valve or water pump and send the signal to water our plants :)

Here is small video that explains pressure switches.
youtube pressure switch video

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Acerca de andreas

Is a trained chemist and architect. He got trained at the Treibacher Chemical Factories where he got formed in different laboratories like Reseach & Development , Active Oxigen, Central Analyses etc.. etc... Then after a profound and wide education in chemistry, he was 2 years responsable for the physical laboratory of the Rare Earth Division. Made the school leaving examination at night and moved on to Graz to study chemistry. After two years of chemistry, from one day to another, in a somehow schizophrenic move he decided to become an architect. A decision he never regreted. He studied architecture at the TU GRAZ and at ETSA Sevilla and worked in different national and international architectual studios in Vienna, Sevilla and Barcelona. For 2010 he will get founded with the Nicola Tesla Schoolarship that will take him to Paris. Currently he is living in Barcelona, prepairing to finish his studies in Paris at the École Nationale Supérieure des Beaux-arts.