Where is the pressure sensor of Sany truck installed?

Where is the pressure sensor of Sany truck installed? It is behind the throttle valve and is usually installed on the air inlet. High-end cars have air flow meters and intake pressure sensors. Specific location features: there is a rubber tube or copper tube, and the other end is an iron knot with two wires on it.

It is connected to the intake manifold by a vacuum tube. With the different engine speed load, it senses the change of vacuum degree in the intake manifold, and then converts it from the change of internal resistance of the sensor to a voltage signal for ECU to correct the fuel injection quantity and ignition timing angle.