Vesda OSI-90 Open-Area Smoke Imaging Detector SF 04/03 voltmeters and multimeters that display

voltmeters and multimeters that display only the voltage rating

Should more than two zones require synchronization

fan operation

Intended Use

The Simplex 4905-9931 is an Adapter Plate

Vesda OSI-90 Open-Area Smoke Imaging Detector SF 04/03 voltmeters and multimeters that displayOpen area Smoke Imaging Detection (OSID) provides projected beam smoke detection technology. By using advanced dual wavelength projected beams and optical imaging technology for early warning smoke detection, OSID provides a low cost, reliable and easy to install solution that overcomes typical beam detection issues such as false alarm incidents and alignment difficulties.