Fluid inspection apparatus

A fluid inspection apparatus configured to define an inspection section of a fluid flow passage of a system, wherein the fluid inspection apparatus comprises:

• a body element having a wall that defines the inspection section, a flow inlet to the inspection section, and a flow outlet from the inspection section, the inspection section defining a flow path between the flow inlet and the flow outlet;
• and
• an impurity indicator configured to indicate the presence of an impurity in fluid flowing through the flow path,
• wherein
• the body element further comprises a first side and a second side,
• the body element defines a cavity along its length L in the first side, which extends at least part of a distance between the flow inlet and the flow outlet, the cavity being offset from and fluidly isolated from the flow path, and the impurity indicator being located in the cavity such that it is fluidly isolated from the flow path,
• the impurity indicator is a magnet,
• the second side defines a viewing region to inspect a surface of the inspection section adjacent to the impurity indicator,
• the inspection section defines a central flow axis, which extends along an extent of the body element,
• the body element defines a first end face spaced apart from a second end face along the extent of the body element,
• the flow inlet is provided on the first end face and the flow outlet is provided on the second end face such that the inspection section extends along the extent of the body element, and
• each of the first side and the second side extend from the first end face to the second end face.