SIEMENS OP520 Collective Optical Smoke Detector[Nov. 2, 2011 5:04:07]
Specification
* Patented optical structure and labyrinth.
* Homogeneous sensitivity for different kind of smoke.
* High stability against dust‚ electromagnetic interference‚ temperature
fluctuation‚ humidity and corrosion.
* Produced with advanced SMT technology.
* Connection is independent of line polarity.