Calectro ST-P-DA Optical smoke detector insert, replacement head / replacement smoke detector for duct smoke detectors

✅ Optical smoke detector insert for reliable and fast smoke detection

✅ Replacement head / replacement smoke detector for duct smoke detector UG-2-A2, UG-2-A3 and UG-2-A4(-OPP) and Strulik BR-Ü, BKI-Ü, BKU-Ü and BK326-Ü overflow dampers / secondary air vents

✅ Easy installation and maintenance

✅ High-quality sensor technology for minimized false alarms

✅ Tests according to EN-54