Description:

Fluid level indicator and flow meter with a numerical display, that changes color based on how full the fluid system is (in a stationary system). You can attach it to a tank to measure the fluid level or can be used to see when to add a pump.

There are two versions: straight pipe and cross pipe.

Modes of operation:

Modes of operation can be changed from the drop-down menu, when the unit is selected.
High-ideal: 100% will be green, gradually goes through yellow to red when it reaches 0%. For systems you want to keep at 100% at all times.
Mid-ideal: 50% will be green, gradually goes through yellow to red at 0% and 100%.
Low-ideal: 0% will be green, and 100% will be red. This is for liquids you want to keep at 0%.
Flow meter (only in Factorio =<1.2): It measures the flow through this unit (shown as blue text, unit: 1/s).