which direction is open and which is closed?

I tried to post a photo, but couldnt figure that out. A picture is worth a thousand words but ill try to do it with less words than that. mount the device at the top of the tank, if the tank is full the float is up and the circuit is open...(In my case the alert light is off) . If the water level drops, the float drops and the circuit is closed and my alert light is on

Brand	DEVMO
Package Dimensions	10.01 x 9.09 x 3.4 cm; 59 Grams
Manufacturer	DEVMO
Are Batteries Included	No
Item Weight	59 g

DEVMO Mini Indicator Vertical Water Level Sensor Stainless Steel 45mm Float Switch

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