Analysis of the principle and usage method of a four in one gas detector
With the diversification of combustible gas detection instruments, other gas detection instruments such as the four in one gas detector have emerged widely in the market, which has to some extent prevented and ensured people's work and life safety.
The four in one gas detector uses a special circuit to measure the detector current at two points. When combustible gas enters the circuit chamber and half of its temperature is sufficient to ignite the gas, it contains a combustion catalyst. When the gas burns, there are changes in the thermal and power circuits passing through the current test area. This change triggered the alarm device.
The hazards caused by toxic gas leaks from many industrial treatment plants, including chemical, oil/gas, power utilities, food and beverage, pharmaceuticals, pulp/paper, and sewage treatment; Leakage sources typically include pipelines, valves, water tanks, burners, refrigerators, separators, lighting systems, aeration tanks, and other equipment.
The working mode of infrared combustible gas detectors is completely different. Due to gas entering the testing room, a beam is emitted. It actually reaches the gas, half enters the gas of a receiver, and then returns to the transmitter. The detector measures the intensity of two beams of light to determine the presence of combustible gases. When the beams are the same, everything is fine, but the change in intensity of the air side beam may indicate a problem.
When using a four in one gas detector to detect toxic gases, the first thing to pay attention to is its inherent issues: adjusting the level and other characteristics at relatively high concentrations based on the chemical stability of toxic gases. Due to their dependence on the non active tension of the airflow, the response time of the samples is generally slower. The calibration of a four in one gas detector is often difficult, which requires the conversion of special accessories and diffusion of operating modes through flow calibration purposes. Furthermore, monitoring and calibration imply that diffusion equivalence between flows is not always a good record.
Secondly, if adjustments must be made in the control panel, the calibration process may become more complex, and gases may be applied to the sensor heads of long-distance diffusion gas detectors. In some applications, there may be interfering gases. The sample extraction method allows the chemical scrubber to place the upstream of the sensor to absorb interference. When the environmental pressure sensor diffuses, all gas sensors measure partial pressure and actively attract sensor samples to work at slightly higher pressures. Therefore, the output sensitivity of sample stretching sensors is usually higher than that of diffusion sensors. This may be an important regulatory level at low levels of toxic gases. But how many toxic gases have necessary characteristics.
A combustible gas detector is a device that senses harmful gases and alerts people to the presence of danger. There are two main methods for detecting combustible gases: controlled combustion and infrared technology. These methods have their own advantages and disadvantages, although infrared methods are usually a safe whole. In addition to the four in one gas detector, there are also various devices such as VOC detector and ozone detector.
