Mounting Position of Sensing Element

The possible mounting positions of the sensing element depend on the catalytic converter type used:

Ensure that there is a sufficient distance between the sensing element and the exhaust gas turbocharger. Normally this distance should be at least 1 meter (3.3').

The NOX sensor is only suited for measurement when mounted in an exhaust pipe.

The mounting position of the sensing element must be defined in such a way that no condensation water is able to collect in the protective tube of the sensing element.

A pipe connected to the exhaust system (e.g. for changing the gas mass flow or gas pressure) must not be located in the environment of the sensing element.

If the intake pipe is located near the sensing element, the distance between the sensing element and the intake pipe must be chosen in a way that condensed liquid droplets will not stream back to the sensing element due to gas pulsation.

When mounting the sensing element after the catalytic converter, make sure that no material escapes from the catalytic converter.

The possible tilt angles of the sensing element depend on the course of the exhaust pipe. Mounting in a vertical exhaust pipe is not recommended by MOTORTECH.

Tilt angles horizontal exhaust pipe

01_Neigungswinkel-horizontal

01_Neigungswinkel-horizontal

      Exhaust gas flow

 

 

Tilt angles vertical exhaust pipe

01_Neigungswinkel-horizontal

    Exhaust gas flow

 

The sensing element heats up as soon as the NOX sensor is powered. Therefore, the sensing element must be installed on the exhaust pipe at a suitable location at which people at the plant cannot be burned by it, or an appropriate protection must be installed around the sensing element that prevents contact with it.

Make sure that the sensing element of the NOX sensor does not overheat at the mounting location. Avoid accumulated heat at the sensing element and ensure sufficient ventilation of the sensing element by ambient air. Also comply with the specified temperature limits (see section Mechanical Data).