Model No. SR-812DC-4 Operating voltage DC9~35V Alarm temperature 57 Static current 13mA(NC);4mA(NO) Alarm current 9mA(NC);19mA(NO) Alarm output Relay output Installation Ceiling mounted Sensitivity 2.06%ft±1.3%ft Working environment -10~+50(â?¤95%RH No congelation) Dimension 100*46mm