Hi Mr DEB

at first i design all pump swich panels with 24V control voltage
i do this because the panels are in a wet envoirement and maintainance personel here in cambodia is not that high qualified in schooling (if the have any) so that small acidents happen more frequently here than on other places in the world

The second thing here is that getting the part here that you want result in long waiting times and inconsistend delivery if availible in asia

so i am more or less depending on what is localy available and believe me that is not that much

Still i have to control the cost also against the reliability and posible problems and a relais is still a good, reliable, easy to exchange, cheap and easy to get device

maybe not high tech or sophisticated but it works

Robert-Jan