Gas detector: a complete guide to industrial safety gas detection

Gas detector is an important safety equipment, which is used to detect harmful gases, toxic gases, oxygen-deficient gases and combustible gases in the environment. It is widely used in oil and gas, petrochemical, chemical, mining, sewage treatment, confined space operation and other industrial fields.

What is a gas detector?

The gas detector is an electronic device used to detect and monitor the concentration of specific gases in the air. When the detected gas concentration reaches the preset alarm value, the equipment can give an alarm by means of sound, light or vibration to help the staff take safety measures in time.

According to different application requirements, the gas detector can detect a single gas or multiple gases at the same time.

Common detection gases include:

• Methane (ch)
• Carbon monoxide (CO)
• Hydrogen sulfide (hs)
• Oxygen (o)
• Hydrogen (h)
• Ammonia gas (NH)
• Chlorine gas (cl)
• Volatile organic compounds (VOCs)

Types of gas detectors

Gas detectors can usually be divided into portable gas detectors and fixed gas detectors.

portable gas detector

Portable gas detector is small in size and easy to carry, and is mainly used for personnel safety monitoring and on-site inspection. Workers can bring equipment into dangerous areas, limited spaces, production workshops, pipelines, storage tanks and other places where gas leakage may occur.

Portable gas detectors include single gas detectors and multi-gas detectors. For example, a common four-in-one gas detector can usually detect combustible gas, oxygen, carbon monoxide and hydrogen sulfide at the same time.

Fixed gas detector

The fixed gas detector is installed in a specific location where there may be gas leakage risk, which can continuously monitor the environment and transmit the gas concentration data to the gas alarm controller, alarm system or industrial monitoring platform.

Stationary gas detectors are commonly used for:

• Natural gas pipeline
• storage tank
• Chemical production equipment
• Pumps and compressors
• boiler room
• gas station
• Industrial production line
• Sewage treatment facilities

How does the gas detector work?

The working principle of gas detector depends on the type of sensor used.

Catalytic combustion sensors are usually used to detect combustible gases. It can judge the gas concentration by detecting the change of the catalytic combustion of the target gas on the sensing element.

Electrochemical sensors are widely used in the detection of toxic gases and oxygen. The sensor will generate an electrical signal related to the concentration of the target gas.

Infrared sensors can be used to detect combustible gases such as methane. It determines the gas concentration by measuring the absorption change of infrared light by the target gas.

PID sensor is mainly used to detect volatile organic compounds (VOC), which can detect a variety of volatile organic gases.

The sensor first converts the gas concentration into an electrical signal, which is then processed by the detector, and finally displays the gas concentration value.

Important technical parameters of gas detector

When selecting a gas detector, you need to pay attention to the following technical parameters.

examination area

The detection range indicates the lowest and highest gas concentration that can be measured by the gas detector. The specific detection range needs to be determined according to the target gas and the actual application environment.

precision

Accuracy indicates the closeness between the measured results displayed by the detector and the actual gas concentration. For industrial applications that need accurate gas concentration monitoring, high-precision detector is more important.

Response time

The response time indicates the time required for the gas detector to make a detection response after contacting the target gas. Shorter response time can help the equipment give an alarm faster in case of gas leakage.

Alarm setting

Gas detectors usually support adjustable alarm thresholds. According to different models, users can set low alarm and high alarm values to meet the safety monitoring requirements of different workplaces.

the protection grades

For industrial applications, the dustproof and waterproof ability of equipment is very important. Many industrial gas detectors adopt enclosures with IP protection level, thus improving the reliability of equipment in complex industrial environment.

Application field of gas detector

Gas detection technology is widely used in many industrial fields.

In the oil and gas industry, gas detectors can be used to detect methane and other dangerous gases around pipelines, storage facilities, compressors and natural gas processing equipment.

In chemical plants, gas detectors can monitor toxic and combustible gases that may be released during production or chemical processing.

In mining industry, gas monitoring is of great significance for detecting methane, insufficient oxygen and other potentially dangerous gas environments.

In confined space operation, the portable multi-gas detector can help the staff to evaluate the ambient gas condition before entering the confined space and during the operation.

In the sewage treatment industry, gas detectors can be used to monitor gases such as hydrogen sulfide and methane that may accumulate in sewage tanks, pipelines and enclosed spaces.

How to choose a suitable gas detector?

When selecting a gas detector, it should be selected according to the actual application requirements, rather than simply selecting the product with the largest number of sensors.

First of all, it is necessary to determine the types of gases that may exist in the site, and then determine the required detection range, use environment, alarm requirements, communication interface and related certification requirements.

If it is mainly used for personnel safety protection and on-site inspection, portable gas detector is usually more suitable. If it is necessary to continuously monitor a specific industrial area, you can choose a fixed gas detector or a complete gas detection system.

For industrial projects, the service life of sensors, calibration requirements, IP protection level, explosion-proof certification, communication interface and post-maintenance should also be considered.

Gas detector manufacturer

Reliable gas detector manufacturers usually need to provide suitable sensor technology, stable detection performance, complete technical data, calibration support and gas detection solutions for different application scenarios.

Hirep focuses on industrial safety gas detection solutions, providing portable and fixed gas detection products, including single gas detector, multi-gas detector, fixed gas detector and gas detection system, which can meet the gas monitoring needs in different industrial environments.

summary

Gas detector plays an important role in the field of industrial safety, which can help workers find potential gas leakage and environmental risks earlier by detecting the concentration of dangerous gas in time and giving an alarm.

From portable personal gas detector to fixed continuous gas monitoring system, different types of gas detection equipment can be selected according to target gas, use environment and safety requirements.

When selecting a suitable gas detector, the target gas, sensor principle, detection range, detection accuracy, response time, alarm setting, protection level, communication mode and related certification requirements should be comprehensively considered. Through the reasonable configuration of gas detection equipment, the ability to identify dangerous gases in industrial sites can be improved, which will provide support for a safer working environment.