NIS-09C is an ion sensing smoke sensor which employs the trace amount of 241 americium radioactive material in its interior. But the sensor itself is covered by metal shell so that radio active rays will not leak out and thus users can use the sensor with reassurance. In the clean air, the output equilibrium voltage has excellent consistency and thus it is unnecessary for assembling the detector to carry out measurement on ionization chamber one by one, and thereby this design can facilitate the automatic production.

NIS-05A is also an ion sensing smoke sensor, which also adopts the trace amount of radioactive material americium 241 in its interior. Since the sensor body is covered by metal shell, radioactive rays will not leak out undoubtedly and thus users can use it with reassurance. In addition, its radiation performance only utilizes 55% of NIS-09C, so users from countries that impose restrictions on the use of radiation performance can also use this kind of sensor with reassurance. Moreover, the pin configuration and output features of the sensor are interchangeable with other company''s products. 05C source chip adopts low-radiation energy, so its equilibrium voltage becomes even more stable in the clean humid air and thereby significantly reduces the rate of false alarm rate after the ionization chamber has been appropriately expanded.