Calectro introduces the latest evolution of our market leading single tube duct smoke detector, the Uniguard. With a simpler installation, smaller and lighter housing and even better detection capabilities, the Calectro Uniguard 8 takes a leap from its predecessors and paves the way for a new generation of single tube duct smoke detectors.
Calectro started its development of duct smoke detectors back in 1978 by offering a dual tube system. This was our first duct smoke detector and became a very important product for our company. We have always tried to be innovative, attentive to our customers and lead the development in our market segment. In 1994 we developed our first Uniguard single tube system, designed for installation in ventilation ducts. This was a unique innovation, and the first smoke detector in the world to use a only one venturi tube. We are very proud of how revolutionary our product was then, and still is today. But time stands still for no one, so we at Calectro continue to lead the way and create innovative solutions for both our users and installers.
How does single-tube smoke detection work in ducts?
The system is based on an air probe (a so-called venturi tube) 1, a smoke detector housing 2 and a control unit 3 (Uniguard smoke detector is also available with an external control unit). The venturi tube conducts the air from the duct to the detector housing, which is fitted to the outside of the duct, where a smoke detector detects potential fire particles in the air. In the event of an alarm, the smoke detector sends a signal to the control unit, which by means of relays then closes dampers 4, stops/starts fans 5 and forwards the alarm, e.g. to the substation. The aerodynamic design of the housing and the pipe are crucially important for the ability to detect small levels of smoke particles in the air at an early stage.
The Uniguard 8 is the result of over 50 yeas of dedicated development in the field of duct smoke detection. As the main purpose of smoke detection is to detect smoke in the ventilation ducts as early as possible so that counter measures can be taken, a high sensitivity for even the smallest amounts of smoke in the duct is paramount. But the system also needs notice the difference between a false alarm activated from smoke from for example a frying pan and that of a real alarm. The Uniguard 8 has, apart from world leading smoke detection, several functions to help and simplify the life of the user during the products life cycle, from installation to service. The toolless opening of the housings lids, electrical installation with spring loaded terminals for faster installations and a clear indication of the status of the system through strong LED lights are just a few of the improvements that the Uniguard 8 delivers. Another new feature for the Uniguard 8 is the patent pending rotation part that gives the possibility of a 360 degree rotation of the duct smoke detector, to make installations in tight places even easier.
The new, patent pending, Uniguard 8 is designed to reduce the installation time to a minimum. With only one venturi tube that contains both inlet and outlet of the airflow, you only need to drill one hole in the duct. Easy access, snap on lids, spring loaded terminals, premounted cable glands and the new rotation device all simplify the installation process.
Uniguard’s patented venturi tube is fitted with aerodynamic flanges that are the most effective way of drawing air from the depths of the entire ventilation duct and delivering it to the smoke detector. This facilitates the discovery of flue gases even in small doses and at low air speeds. The effect of the venturi tube has been measured and doumented by external laboratories.
The Uniguard 8’s patent pending housing has been specially designed using simulation software to achieve a maximum concentration of flue gases around the smoke detector. Together with the patented venturi tube, the UG8 housing creates an unsurpassed detection performance, even at a very low duct air speed. It is also equipped with an air flow indicator for easy inspection.
En av Uniguard 8:s unika fördelar är dess världsunika rotationsdetalj. Denna förenklar installationen avsevärt då venturirör och detektor kan installeras separat. För att lättare placeras i trånga utrymmen kan detektorn roteras upp till 360 grader medan venturiröret och rotationsdetaljen hålls fixerade i rätt luftflödesriktning.
This is how the rotation part works
First you drill a hole into the duct, then mount the rotation part together with the venturi tube with the screws.
Place the duct smoke detector on the rotation part.
The duct smoke detector can now be rotated around the rotation part for the optimal placement before being screwed in place.