Description

The versatile and reliable ST 728 Stand-alone photoelectric smoke detector can be calibrated into either UL, BSI Standards. It features ULapproved Photoelectric sensing components with precise smoke detection. and long life (18 months) 9V battery operation (9V Ultralife Lithium battery model for 7-year life is available too). ST-728 also comes with optional heat detection combo model and various power input.