Fibre-optic instruments, namely, distributed fiber optic sensing (DFOS) instruments; fire fighting equipment, namely, fire fighting monitors that track and analyze the spreading of fire in and on long linear objects, in particular tunnel systems, buildings and industrial plants, power plants and offshore platforms, refineries, conveyor belts, and photovoltaic systems; electronic temperature monitors for electric mains and in boreholes; electronic monitors for monitoring of linear objects, nam...