scope:

This European Standard applies to LTHD consisting of a sensing element using an optical fibre, a pneumatic tube or an electrical sensor cable connected to a sensor control unit, or either directly or through an interface module to a control and indicating equipment intended for use in fire detection and fire alarm systems installed in buildings and tunnels. This standard also covers LTHD intended for use in the local protection of plants and machinery. LTHD with special characteristics and developed for specific risks are not covered by this standard. This standard specifies the requirements and performance criteria. This standard specifies the corresponding test methods and the evaluation of conformity of the product to the standard.