The DH500 duct housing is designed to sample air
currents passing through a duct and allows the early
detection of developing fire. The DH500 duct housing
will accommodate either the intelligent ionisation
sensor or the intelligent optical sensor, either of which
provides continous analogue monitoring of the unit’s
sensitivity. When sufficient smoke is sensed, an alarm
signal is initiated at the control panel monitoring the
detector, and appropriate action can be taken to shut
off fans and blowers, change over air handling systems,
etc. This can prevent the rapid distribution or isolation
of toxic smoke and fire gases throughout the areas
served by the duct system.
The DH500 duct detector system features the
superior capabilities of an intelligent sensor in a
unit that is easy to install and maintain, making
this duct detector the new industy standard.
The twist-in, twist-out detector and base allow
the removal of detectors easily and quickly for
cleaning and maintenance. In addition, detector
heads can be changed to fit the application
without removing the duct housing. The DH500
comes with a built-in exhaust tube. Sampling
tubes are available to fit ducts from 0.6M to 3M
(1 to 10 feet) wide.
• Accommodates intelligent ionisation or optical detectors
• Continous sensitivity monitoring and alarm verification from the panel
• Simple change of detector heads: twist-in, twist-out
• Easy and quick mounting to round or rectangular ducts
• Outputs for remote test station (separate 24 Vdc is required)
• Air velocity rating from 150 to 1200 metres per minute (500 to 4,000 feet per minute)
• Clear polycarbonate cover for convenient visual inspection of sampling tube filters
• Rugged Noryl® housing (mounting portion)
• Three year limited warranty
mechanical
Dimensions (HxWxD): 127 x 367 x 102 mm
Weight: 1.1kg (2 lbs)
Operating temperature: -10°C to 60°C
Humidity: 10% to 93% non-condensing
Air velocity: 150 to 1200 metres (500 to 4,000 feet) per minute
electrical
Operating voltage: 15 to 32 Vdc
Current consumption: 200 μA at 24 Vdc
7 mA at 24 Vdc LED current nominal Terminals: SEMS screws with clamping plates for up to 2.5 mm2 (13 AWG) wire