Increasingly, managers and owners of enterprises andorganizations entrust protection from the fire of their production and office areas to automation. Modern smart security systems not only provide an alarm in a timely manner, but also independently start to extinguish. The eyes of any automatic system are sensors (detectors). They directly react to the primary fire factors, creating a signal consisting of electrical impulses, understandable to fire automatics. The fire detector IP 212 3SU is one of the modern sensors that meets the highest requirements.
The first fire detectors were thermaldevices of mark TP. This is 99% of all detectors used in fire protection systems of objects until about 1995. The device is two brass plates welded with a special composition with a low melting point.
Depending on the type of premises, from its workingtemperature, alloys with different characteristics are used. After all, in the steel shop and, for example, in the finished goods warehouse at the ice cream factory, the operating temperatures will vary greatly. Such sensors are placed evenly over the area of the room, as well as over the most flammable points.
The principle of the device is easy to describe.When the temperature rises above the critical temperature, the alloy collapses, the plates are dilated under the action of the elastic force from each other, which causes a sharp jump in the resistance in the AL circuit. Despite the phenomenal simplicity, such a detector had one significant drawback - an extremely low response rate. After all, in order to melt the solder, the room should already burn the fire.
Detector IP 212 3SU refers to more advanced devices that can detect ignition at the earliest stage. What is the basis of his work?
The "heart" of the device IS 212 3SU is a smokecamera. In the body of the chamber are located the emitter of light waves and a photodetector. Their mutual arrangement is such that in normal mode the light produced by the radiator does not enter the receiver.
But it is in the room, and accordingly, in the smoke(smoke is nothing but particles of solid carbon in the form of coal and graphite), as the picture changes. Some of the light rays reflected from the smoke particles begin to enter the photodetector. And when the intensity of the radiation received by the photocell overcomes a certain predetermined threshold, the ИП 212 3СУ works, and a sharp drop in resistance occurs in the loop of the alarm loop. The electronic filling of the device helps to cut off false alarms by filtering out changes in natural light and getting into the camera of household dust.
Used IP 212 3SU in all modern fire automation systems in conjunction with detectors and sensors of other designs, cameras and other security devices.
It is used for smoke detection:
- in private houses;
- apartments of multi-storey apartment houses;
- office premises;
- in warehouses of material values of any type;
- in production buildings and structures of any, including agricultural, orientation.
IP 212 3SU has the following performance characteristics:
- dimensions: diameter - 9 cm, height - 5 cm;
- weight - 0,1 kg;
- can be used in the range from minus 40 to plus 60 ° C and humidity up to 98%;
- V power supply - 9 ... 30 V;
The response time is not more than five seconds.
