General SHIELD Heat Detector is distinguishable by the low airflow resistant case and uses a single thermistor to sense the air temperature around the detector. ■ Responds well to slow-burning, smoldering fires . ■ Well suited for bedrooms and escape routes. ■ Unaffected by atmospheric pressure. ■ Ideal for environments that are dirty or smoky under normal conditions . ■ Well suited for warehouses, loading docks and parking garages ■ Unaffected by wind or atmospheric pressure. ■ Remote test feature.