Is this float switch circuit really all I need?

[MarkMc]

I need to turn on a solenoid valve to let water in to a container
whilst a float switch is down (n/c configuration).

I was just going to put the switch and the solenoid in series with a
240v AC supply.

Is this really all I need or is this rather naive?

Regards,
Mark

 

[John Fields]

I need to turn on a solenoid valve to let water in to a container
whilst a float switch is down (n/c configuration).

I was just going to put the switch and the solenoid in series with a
240v AC supply.

Is this really all I need or is this rather naive?

---
If the current and voltage rating of the switch is >= the voltage
and current rating of the solenoid then that's all you should need.

If it isn't, then you'll need to use the switch to drive a relay and
the relay (in series between the mains and the solenoid) to drive
the solenoid.

 

[MarkMc]

AFAIK, it is, so thanks!

cheers,
Mark

 

[Jasen Betts]

I need to turn on a solenoid valve to let water in to a container
whilst a float switch is down (n/c configuration).

I was just going to put the switch and the solenoid in series with a
240v AC supply.

Is this really all I need or is this rather naive?

That is almost exactly how washing machines fill to the apropriate
level. (except they use a pilot tube pressure sensor)

Bye.
Jasen