The Arktis fast neutron detector provides spectral and timing information, unbeatable robustness, simple integration and operation in challenging environments. The easy to use fast neutron detector allows for a better understanding of the neutron flux in a given experimental area. A tunable and settable energy threshold allows to concentrate on the neutron energies of interest. The detector delivers a standard TTL output for each detected neutron, making it easily compatible with other detection systems and suitable for drop-in replacements. The Rugged-by-Design family of neutron detectors uses a SiPM* based signal readout, making it immune to shock and vibration, and scalable in length.