Bosch ISC-BDL2-W12G Blue Line Gen2 TriTech Motion Detector

The Bosch ISC-BDL2-W12G combines passive infrared sensing with 10.525 GHz microwave Doppler radar across a 40 x 40 ft room. Both channels evaluate movement before the alarm output changes state, helping reject disturbances that affect only heat detection or only microwave reflection.

First Step Processing responds quickly to human movement, while microwave noise-adaptive processing and dynamic temperature compensation tune the response around background conditions. A sealed optical and electronics chamber, wall-to-wall coverage, an optional look-down zone, and a cover tamper support consistent operation after installation. This exact W12G model is the standard non-pet version.

For an existing security system takeover, this detector can be a useful upgrade where nuisance alarms have made a basic PIR difficult to trust. Allied confirms the available 9-15V DC power, keeps microwave energy within the intended room, and walk-tests both technologies together instead of treating the catalog range as a finished design.