Dry contact sensors
PowerEgg
110/230V power detection and switching
Detects failures of electricity supply
Optical Smoke Detector
detects smoke and signals a fire alarm
Suitable for installation in data centers and telco rooms
LD-63HS
Flood detector
Designed for room flood detection or exceeding of allowed water level
Air Flow SL5101
Air Flow Detector
Detects air flow below or above a specified threshold in the 1 to 10 m/s range