The LE-SLR-24V can be used in all areas where Photoelectric Smoke detectors are required. The wide range smoke chamber makes the LE-SLR-24V well suited for fires ranging from smoldering to flaming fires. LE-NS-4 Series, LE-NS-6 Series, LE-HSC-4R or LE-HSCxxx R Style bases may be used with the LE-SLR-24V. Current interchangeable/compatible devices are the LESIJ-24 ionization detector, the LE-SLR-24H photoelectric detector with heat sensor, and the LE-dCd-135/190 heat detectors. All LE-NS conventional devices are mechanically compatible with Lifeco LE-HSB, LE-HSC and LE-YBA type bases which may have been used in previous installations. Please check individual panel listings for compatible bases.