Precautions when purchasing a gas detector
With the increasing development of industry and life, gas detectors are more and more widely used in the field of application, and the technology for producing gas detectors is also becoming more and more advanced. Fixed instruments are also indispensable in many places such as chemical plants, power plants, coal mines, etc. They can protect human life and ensure the continuous and stable production development of the industry. Therefore, how to choose a gas detector becomes our operator. required courses.
How to choose a gas detector according to the environment, space, and gas? Shenzhen Lanyue Measurement and Control Technology Co., Ltd. is here to give you some tips! When choosing a gas detector, we all need to pay attention to the following points:
1. Depending on the occasion of use and different industrial environments, the types of gas detectors to choose are also different.
2. Select the appropriate range.
3. Choose between pump suction or diffusion
Fixed gas detector: This is a detector that is used more in industrial installations and production processes. It can be installed at specific detection points to detect specific gas leaks. The fixed detector is generally a two-piece type. The detection head composed of sensor and transmission is installed at the detection site as a whole, and the secondary instrument composed of circuit, power supply and display and alarm device is installed as a whole at the high-level site, which is convenient for monitoring. Its detection principle is the same as that described in the previous section, but it is more suitable for the continuous and long-term stability required by fixed detection in terms of technology and technology. They also need to be selected based on the type and concentration of the gas on site, while also taking care to install them where the specific gas is most likely to leak.
Portable gas detector: The portable instrument itself is easy to operate, small in size, and can be carried to different production sites. The electrochemical detector is powered by alkaline batteries and can be used continuously for 1000 hours; the new LEL detector, PID and composite instruments are available. Rechargeable batteries (some have adopted memoryless nickel-metal hydride or lithium-ion batteries) make them generally work continuously for nearly 12 hours. Therefore, gas detectors are more and more widely used in various factories and health departments as such instruments.
Gas detector: The longer the life of the sensor, the better. Generally speaking, the life of the sensor is at least 2 years, and the life of the flammable gas sensor is 2 to 5 years. The longer the average error time, the better. What is the accuracy and precision, the smaller the error value, the better. The product warranty period is generally 2 years.
Gas detection alarm: the longer the life of the sensor, the better. Generally speaking, the life of the sensor is at least 2 years, and the life of the combustible gas sensor is 2 to 5 years. The longer the average error time, the better. What is the accuracy and precision, the smaller the error value, the better. The product warranty period is generally 2 years.
When purchasing a gas detector, pay attention to 7 important links:
1. Correction requirements
Calibration method, duration, and ease of use. There are two calibration methods - laboratory and field calibration. Field calibration is to exhale the oxygen sensor, the oxygen reading of the instrument must drop and an alarm occurs.
2. Reliability
The longer the sensor life of the gas detector, the better. Generally speaking, the sensor life is at least 2 years, and the combustible gas sensor is 2~5 years. The longer the average error time, the better. What is the accuracy and precision, the smaller the error value, the better. The product warranty period is generally 2 years.
3. Applicability
Enterprise professionals and on-site experienced operation supervisors or employees should identify and evaluate the hazardous gases in the limited space operation site to determine whether the sensor of the selected detector meets the needs of use.
4. Reliability
The longer the sensor life of the gas detection alarm, the better. Generally speaking, the sensor life is at least 2 years, and the combustible gas sensor is 2~5 years. The longer the average error time, the better. What is the accuracy and precision, the smaller the error value, the better. The product warranty period is generally 2 years.
5. Ease of identification
Numerical or pointer gas detectors. Generally speaking, the numerical type has the advantages of easy readability and less misjudgment. Whether the display area is large enough, with background lighting and large fonts, for easy reading and understanding. Whether the siren is loud enough to distinguish it from background noise. Generally, it is applicable to the effect above 90dB(A). Whether the warning flashing light can be recognized from various angles. Whether the signal can be continuously displayed with the change of the measured gas concentration, and the alarm will be stopped after confirmation or countermeasures are taken.
6. Convenience
Light weight, small size, easy and comfortable wearing, easy maintenance.
7. Stability
What is the value of the zero offset and full amplitude offset of the detector, the smaller the better.
