Photoelectric, integrated low-flow technology Air velocity rating from 1.5 m/s to 20.3 m/sec Versatile mounting options in square or rectangular configuration with modular construction Plug-in sensor Superb false alarm immunity with the latest sensor technology Broader ranges for operating temperature (-20ºC to 70ºC) and humidity (0% to 95% non-condensing) Patented sampling tube installs from front or back of the detector with no tools required A cover tamper feature to indicate a trouble condition for removed or improperly installed sensor cover Increased wiring space with 15mm and 20mm conduit knockout Improved LED status 24 VDC Backward compatibility with existing DH400 range, including remote accessories

Key Features:; Omni-directional light coverage eliminates need for device orientation. First fix capability allows electrical continuity testing prior to device fitting. Deep base option with multiple cable entries for flexible installation. Designed with full range of common fixing centres. Positive fit engagement and feedback of base with device for easy installation.

Key Features:; Omni-directional light coverage eliminates need for device orientation. First fix capability allows electrical continuity testing prior to device fitting. Deep base option with multiple cable entries for flexible installation. Designed with full range of common fixing centres. Positive fit engagement and feedback of base with device for easy installation.

EN 54-3 compliant Suitable for 12 V and 24 V DC service voltage Synchronous sound trigger Volume adjustable to 2 levels at the device

Key Features:; Approved to EN54-3 Superior sound output and low current consumption 32 tones all approved to EN54-3 Adjustable volume settings Two stage sounders enable alert and alarm sequences to be set for phased evacuation Synchronised sound output