Bosch ISC-BDL2-W12G Blue Line Gen2 TriTech Motion Detector, 40' x 40' Coverage, PIR, Microwave, 10.525 GHz

The Bosch ISC-BDL2-W12G is a Blue Line Gen2 TriTech motion detector combining passive infrared (PIR) sensing and 10.525 GHz microwave detection with 40 x 40-foot (12 x 12-meter) coverage. Designed for compatible wired intrusion alarm systems, it operates at 9-15 VDC with a current draw of 10 mA at 12 VDC and features First Step Processing, dynamic temperature compensation, and Microwave Noise Adaptive Processing to reduce nuisance alarms. Its compact white housing includes sealed optics, a normally closed alarm relay, tamper protection, and an integrated bubble level for installation.

Bosch ISC-BDL2-W12G Blue Line Gen2 TriTech 40-Foot PIR and Microwave Motion Detector

The Bosch ISC-BDL2-W12G is a dual-technology wired motion detector combining passive infrared (PIR) sensing with 10.525 GHz microwave Doppler detection for commercial and residential intrusion alarm systems. Part of the Bosch Blue Line Gen2 TriTech Series, this detector provides 40 x 40 feet (12 x 12 meters) of wall-to-wall detection coverage, allowing installers to monitor rooms, hallways, offices, retail spaces, and other protected interior areas. Its dual-sensing architecture evaluates thermal movement and microwave activity to help distinguish legitimate intrusion events from environmental disturbances. The detector integrates with compatible hardwired security control panels through a normally closed alarm output and separate tamper circuit. Its low-profile white enclosure and installer-friendly mounting features make it suitable for new alarm system installations and replacement of compatible wired motion detectors.

The ISC-BDL2-W12G incorporates First Step Processing (FSP), Microwave Noise Adaptive Processing, and dynamic temperature compensation to improve motion detection consistency and reduce unwanted alarms. First Step Processing evaluates infrared signal amplitude, polarity, slope, and timing to identify movement patterns associated with human activity without requiring installers to manually select a PIR sensitivity level. Microwave Noise Adaptive Processing adjusts to repetitive background disturbances that could otherwise cause nuisance activations, while dynamic temperature compensation modifies detection sensitivity as surrounding temperatures change. The detector also features sealed optics and protected electronic components that help prevent dust, insects, drafts, and accidental handling during installation from affecting the sensing chamber. A selectable visible alarm LED supports walk testing and can be disabled after commissioning. These detection and signal-processing features provide stable performance in properly designed indoor intrusion detection applications.

The Bosch ISC-BDL2-W12G operates from a 9-15 VDC low-voltage power source and draws approximately 10 mA at 12 VDC in both standby and alarm conditions. Its microwave sensing circuit operates at 10.525 GHz, while the PIR sensor monitors changes in infrared energy within the protected detection pattern. The detector provides a normally closed, supervised solid-state Form A alarm output rated for a maximum of 100 mA at 25 VDC, along with a separate normally closed cover tamper contact rated for the same voltage and current. The tamper circuit can be connected to a compatible 24-hour protection zone to indicate unauthorized opening of the detector housing. Its detection pattern incorporates improved lookdown coverage and supports wall-to-wall intrusion monitoring when installed at the recommended height. The detector is designed for mounting between 7.5 and 9 feet (2.2-2.75 meters), with an installation height of approximately 7.5 feet recommended by Bosch. An adjustable microwave range control allows installers to refine microwave coverage according to room dimensions and surrounding conditions.

The ISC-BDL2-W12G features a white, high-impact ABS plastic enclosure measuring 4.2 inches high, 2.4 inches wide, and 1.7 inches deep (105 x 61 x 44 mm). Its self-locking sliding housing incorporates an integrated bubble level and lift-gate terminal blocks to simplify mounting, electrical termination, and mechanical alignment. The detector can be installed directly on a flat wall or in a room corner, while optional Bosch accessories provide additional aiming flexibility. Compatible mounting accessories include the B328 gimbal-mount bracket, B335-3 swiveling low-profile wall mount, and B338 universal ceiling-mount bracket. The detector operates within a manufacturer-specified temperature range of -20 F to 130 F (-30 C to 55 C), with a restricted operating range of 32 F to 120 F (0 C to 49 C) for UL-listed installations. It supports relative humidity levels up to 95% non-condensing under general specifications, or 85% maximum for UL applications. The enclosure is rated IP30 and IK04, indicating suitability for protected indoor environments rather than exposed outdoor locations.

The Bosch ISC-BDL2-W12G is designed for integration with conventional hardwired intrusion detection and burglary alarm systems requiring dual-technology motion sensing. The detector is UL 639 listed for intrusion-detection units, with applicable FCC certification and Canadian CAN/ULC-S306 recognition documented by Bosch. Its radio-frequency interference immunity helps maintain stable operation in environments containing compatible electronic equipment, while the tamper-protected housing supports professionally monitored security installations. The ISC-BDL2-W12G is specifically the non-pet-immune 40-foot TriTech model; the separately ordered ISC-BDL2-WP12G provides selectable pet-friendly operation for supported applications, including installations with one or two pets weighing up to a combined manufacturer-specified 100 pounds. The ISC-BDL2-W12H uses a different 10.588 GHz microwave frequency for designated international markets. The standard W12G requires an external wired alarm control panel and does not include a wireless transmitter, integrated siren, or standalone alarm communicator. Combining 40-foot dual-technology detection, low-current 12V operation, adaptive signal processing, sealed optics, and simplified mounting, the Bosch ISC-BDL2-W12G provides an intrusion detection solution for commercial buildings, residential properties, and compatible wired security system upgrades.