Increasingly, managers and owners of enterprises and organizations trust automation to protect their production and office space from fire. Modern smart security systems not only give an alarm in a timely manner, but also independently start extinguishing. The eyes of any automatic system are sensors (detectors). They directly respond to the primary fire factors, creating a signal consisting of electrical impulses, understandable to fire automation. The fire detector IP 212 3SU is one of the modern sensors that meets the highest requirements.
A little about the first fire detectors
The first fire detectors were thermal devices of the TP brand. This is 99% of all detectors used in fire protection systems of objects until about 1995. The device consists of two brass plates soldered with a special composition with a low melting point.
Depending on the type of room, on its operating temperature, alloys with different characteristics are used. After all, in the steel shop and, for example, in the warehouse of finished products atIn an ice cream factory, operating temperatures will vary greatly. Such sensors are placed evenly over the area of the room, as well as above the most fire hazardous points.
The principle of operation of the device is easy to describe. When the temperature rises above the critical one, the alloy is destroyed, the plates are separated from each other under the action of the elastic force, which causes a sharp jump in 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 for the solder to melt, the fire must already be burning in the room.
Working principle
The IP 212 3SU detector is one of the more advanced devices that can detect a fire at an early stage. What is the basis of his work?
The "heart" of the device IP 212 3SU is a smoke chamber. A light wave emitter and a photodetector are located in the camera body. Their mutual arrangement is such that in normal mode, the light produced by the emitter does not enter the receiver.
But standing in the room, and accordingly, in the smoke chamber, smoke appears (and 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 fall into the photodetector. And when the intensity of the radiation received by the photocell overcomes a certain predetermined threshold, the IP 212 3SU is triggered, and there is a sharp drop in resistance in the alarm loop circuit. The electronic filling of the device helpscut off false alarms by filtering out natural light fluctuations and household dust entering the chamber.
Application and characteristics
IP 212 3SU is used in all modern fire automation systems in conjunction with detectors and sensors of other designs, cameras and other security devices.
Used for smoke detection:
- in private homes;
- apartments of multi-storey residential buildings;
- office space;
- in warehouses of material assets of any type;
- in industrial buildings and structures of any, including agricultural, direction.
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 supply - 9…30 V;
The response time is no more than five seconds.
