Atmo Switch active with 0kg pressure

511.7kg is above (higher than) 0kg => switch active.

The differences between athmos and fluid switch are the scale of their slider (0-2000g vs. 0-1000kg) and the images.

The 517kg is liquid, not gas. This is an atmo switch. Current pressure is correct: 0kg.

Edited June 1, 2017 by onebit

Sorry, first coffee didn't take this morning and you confused me with adding the water.

After playing a bit with the debug mode, the issue is the following:
The (Hydro/Atmo) Switch will change activation status when the pressure traverses over the set threshold (=reaches the other side), so a switch set to 'above 0kg' will never turn off after having been activated as a pressure below zero is impossible to reach.

 

It looks to me like the switches are >= <= instead of > <. The labels would indicate < >.

What I want to do is detect if there is any amount of liquid or gas present.

hydro > 0kg says "have liquid, no gas"

atmo > 0g says "have gas, no liquid"

Edited June 1, 2017 by onebit