How Does Multi Gas Detector Work?

Multi gas detector is a kind of single gas detector or multiple gas detectors that can be flexibly configured. It can be equipped with oxygen sensor, combustible gas sensor, toxic gas sensor or any four gas sensors or any single gas sensor.
The principle of the detection part of the four-in-one gas detector is that when the concentration of combustible gas measured exceeds the limit value, the amplified bridge output voltage and the circuit detection set voltage are passed through the voltage comparator and the square wave generator to output a group of square wave signals, control the sound and light detection circuit, the buzzer generates continuous sound, the led shines, and the detection signal is sent out.

The principle of the detection part of the four-in-one gas detector is that when the concentration of combustible gas measured exceeds the limit value, the amplified bridge output voltage and the circuit detection set voltage are passed through the voltage comparator and the square wave generator to output a group of square wave signals, control the sound and light detection circuit, the buzzer generates continuous sound, the led shines, and the detection signal is sent out.

The principle of the multi gas detector shows that if an electromagnetic interference can affect the signal to detect, the data deviation; If there is a collision, vibration resulting in device circuit will be broken detection failure; If the environment is excessively humid or the equipment is flooded, it may also cause a short circuit in the four-in-one gas detector, or the resistance value of the line changes, causing a detection fault.

The four-in-one gas detector is composed of detection and detection parts and has detection and detection functions. Four in one gas detector detector sensor detection components and fixed resistance and zero potentiometer constitute a detection bridge. Platinum wire was used as catalytic element in the bridge circuit. After electrification, the temperature of platinum wire rose to the working temperature, and the air reached the surface of the element by natural diffusion or other means. When no combustible gas in the air, bridge circuit output is zero, when the air contains flammable gases and spread onto the detecting element, because the flameless combustion catalyst, temperature, detection element, platinum resistance increases, the bridge road out of balance, to have a voltage signal output, the size of the voltage is proportional to the concentration of combustible gas, signal amplifying, modulus conversion, through liquid display shows the concentration of combustible gas.