Where’s the sensor of the bilge pump?

[Krumelur]

Bavaria 40, 2010: I thought I'd have one of these bilge pumps activated by a lever that would float in case there's water in the bilge. But now, back at the boat, I find the setup to be different. It's a small pump and a downward facing strainer connected to it.
Is this thing auto activating? How? Where's the sensor?

[symphony2]

No it is operated by the switch on the panel. You can replace it with an automatic bilge pump if you want, but these are only really useful if you have a boat that leaks a lot - which Bavarias don't!

[kavok]

My solution on 40 Cruiser. A new electric pump twice power of the standard+ an automatic pum with own water sensor, h 24, and dedicated electric mini panel and switch.
The standat pump is to little for 40 ft boat.