TASK DEFINITION: Translate the given Spanish text to English
PROBLEM: The apparatus measures substance concentration by detecting radiation in the far infrared range emitted by the body using an infrared detected in combination with a set of adequate filters.

SOLUTION: El aparato mide concentración de sustancia mediante detectar radiación en el rango infrarrojo lejano emitida por el cuerpo usando un infrarrojo detectada en combinación un conjunto de filtros adecuados.

PROBLEM: Form the roof of the accommodation and cover it with appropriate sheeting.

SOLUTION: Conformar el tejado del habitáculo y recubrirlo con chapa apropiada.

PROBLEM: Methods for their manufacture are also disclosed.

SOLUTION:
Tambien se revelan metodos para su fabricacion.