Note: The two conveying tubes (behind) must also be completely wrapped (connected), not only wrap (connect) the two wires.
It implies there are 4 connections to be made, though I don't know the difference between the two types (tube vs wire).
Fluid Level Sensor (or transimitter)
Range: 0 - 3 Meters
Output: 4-20 mA
The upper first three letters "Do not touch.."
The lower letters "Tear apart not..."
I guess it means "Do not touch the label. The warranty is waived if it is torn apart/destroyed/damaged".
The letters on the body of the device list the supplier's address and phone number. The rest words are illegible.