Hazardous Location Photoelectric Smoke Detector

The Explosionproof Smoke Detector has been designed for use in hazardous industrial and commercial locations. It is a sensitive yet rugged, state-of-the-art, life safety device. The detector is designed to operate effectively with both slow smoldering and fast burning fires.

The detector uses a solid state infrared emitting diode (IRED) and a light sensing photovoltaic cell arranged in a labyrinth assembly. Such an assembly permits free access to smoke but restricts external light. A light beam from an IRED with associated optics is projected across the interior of the labyrinth into a light catcher. A recessed photodiode provides voltage for amplification to “alarm signal” level. The main enclosure of the detector contains the electronics, alarm relay, supervision relay and facilities for connection to system wiring.

For use in combustible storage facilities, munitions manufacturing, volatile chemical storage, chemical processing plants, petroleum refineries, turbine enclosures or any hazardous location where photoelectric smoke detection is required.

Each detector contains one set of Form A (SPST) N/O contacts for connection to the alarm initiating circuit and a set of (SPST) N/C power supervision contacts.  The detector locks in on alarm and has a lock-in alarm indicator (LED) on the outer surface of the housing. Detector reset is achieved by momentary interruption of power.

Standard Features

• Labyrinth assembly
• Self-checking components
• Infrared (IRED) light emitting diode as light source
• Maximum operating air velocity is 3960 FPM
• Input voltage: 20-28 Vdc
• Input current: 10mA Standby & 35mA Alarm
• Operating temperature rage: -4°F to 140°F
• Agency Approvals: VDE, Designed to meet Class I, Div 1, Groups C & D; Class II, Div 1, Groups E, F & G