Why is a gas detector necessary?
In the industrial production process, the leakage of flammable, toxic and harmful gases often occurs, which will cause serious threats to personnel, equipment, production, and life. The main reasons for leakage are :1. Material defects of production equipment or containers. 2. The sealing ring and ring are not tightly sealed. 3. The welding place of the container is subject to long-term electrochemical corrosion. 4. Human negligence, etc.
The leaked flammable gas or toxic gas is quickly diluted by air, so the location of the leak is difficult to find, and it is even more difficult to quantitatively analyze it. After a period of time, these gases will accumulate in some areas or at certain blind spots. When the content of flammable gas in the air reaches a certain value, it is very easy to burn or explode when encountering an open flame. If this very dangerous hidden danger cannot be discovered in time, it will cause great loss to personal safety and property.
To predict this potential hazard, you can install a larger number of gas detectors in living and production areas with potential leakage hazards, and they can continuously measure whether the combustible gas in the air around the device reaches the combustion or explosive concentration. Once the gas sensor detects the presence of combustible gas or toxic gas, it will immediately respond by displaying the reading, sounding an alarm, or sending an alarm to your mobile phone. Let people take immediate measures to deal with the leakage, on the other hand, disperse the surrounding air, reduce the concentration of flammable gas in the air, and avoid the occurrence of serious accidents.
Renke is a brand manufacturer with 15 years of production and R&D experience. In the past few years, Renke has been committed to the development and testing of high-quality practical gas detectors in order to meet the needs of different customers, and continue to improve their functions. At present, our brand of industrial gas detectors work stably, with high sensitivity, and are well received by the market. Based on our testing, expertise, and review of updates and innovations in the market, we recommend the following eight best industrial gas detectors:
The best economical gas detector – RS-*-*-2 Wall mount gas detector
The best duct mounted gas detector–RS-*-* Duct type gas detector
The best portable multi-gas detector–RS-MG41-1 4 gas detector
The best portable single gas detector–RS-MG41-* Handheld gas detector
The best explosion-proof gas detector–RS-FPC-*-N01-* Fixed gas detector
The best weather monitoring gas detector–RS-MG051-N01-BYH Outdoor gas detector
The best indoor gas detector–RS-*-*-N01-C Smart single gas detector
The best multifunctional gas detector–RS-MG111-*-1 All in one gas detector
How to choose the right gas detector?
1. Wall mount gas detector
This wall-mounted gas sensor is the cheapest industrial-grade gas detector. The overall appearance is made of waterproof ABS plastic, so it can be widely used in harsh environments with more smoke and dust. This gas detector has two output modes: rs485 and analog output, which can ensure stable signal and accurate measurement even after long-term work. The gas detector is equipped with a waterproof temperature and humidity probe at the bottom, which can meet the needs of users to simultaneously detect the three elements of temperature, humidity, and gas. In addition, multiple wall-mounted gas sensors can be installed in an industrial park and the detection information can be uploaded to a unified free cloud platform, effectively realizing accurate measurement and centralized monitoring of multiple locations. This is also the most economical gas detector.
Features:
Power supply: 10~30V DC
Protection grade: IP65
Output: 4-20mA/0-5V/0-10V/RS485
Gases detected: carbon dioxide, carbon monoxide, methane, ammonia, oxygen, ozone, hydrogen sulfide, tvoc, formaldehyde, hydrogen, sulfur dioxide, nitrogen dioxide, sulfur hexafluoride, etc.
Price: $41.5~$295.4(according to different gases)
2. Duct type gas detector
This duct mount gas detector adopts a new type of infrared verification technology for gas concentration measurement, and the response is rapid and sensitive, which avoids the short life and long-term drift problems of traditional electrochemical sensors. The enclosure has a high degree of protection and can adapt to various harsh conditions on-site. The measuring element is located in a 22 cm long stainless steel probe. When measuring, make a suitable hole in the tube to be measured, insert the probe and fix it with a flange. After the wiring is completed, the gas concentration in the pipeline can be stably detected for a long time, and the probe is waterproof and has a long service life.
Features:
Power supply: 10~30V DC
Protection grade: IP65
Output signal: RS485, 4~20mA, 0~5V, 0~10V
Working temperature: -20~50℃, 15~90%RH non-condensing
Gases detected: carbon dioxide, carbon monoxide, methane, ammonia, oxygen, ozone, hydrogen sulfide, formaldehyde, hydrogen, sulfur dioxide, nitrogen dioxide, sulfur hexafluoride, etc.
Price: $60.6~$316.6(according to different gases)
3. Four gas detector
This handheld gas detector is the most popular multi-gas detector on the market. It can simultaneously detect four gases: oxygen, combustible gas, carbon monoxide, and hydrogen sulfide. The detected gas is a common industry gas, so it is widely used. It has a very exquisite appearance, adopts a high-definition color screen design, and is equipped with a suitcase, so it is very professional when going out. This 4 in 1 gas detector is powered by a rechargeable lithium battery, which can be used normally after turning it on, avoiding wiring problems. It has three alarm functions: sound, light, and vibration. It also has a data storage function and can store up to 130,000 items at a time. The user can export or view historical data through the configuration software. Because this gas detection is small in size, it is suitable for customers who can carry it with them for gas detection in different locations.
Features:
Power supply: DC3.7V (Lithium battery capacity 3000mAh)
Working environment: -10℃-50℃, <95%RH without condensation
Explosion-proof mark: Ex ib IIB T3 Gb
Charging time: 6h-8h
Standby time: more than 8h continuous
Response time: Diffusion type≤60S
Alarm function: sound, light, vibration
Gases detected: Carbon monoxide, hydrogen sulfide, oxygen, combustible gas (CH4, NH3)
Price: $127.9
4. Handheld single gas detector
The appearance of this portable gas detector is the same as the above 4 in 1 gas detector, and it is also suitable for customers who measure gas concentrations in different places. It also has three alarm functions of sound, light and vibration and data storage function. This gas detector is mainly used to measure the concentration of a single gas, so it will not be interfered with by other gases during the measurement process, and the data is intuitive. There are two types of this gas sensor: diffusion and pumping. The diffusion type is to rely on the gas flow entering the inside of the detector to be detected by the sensor module and output signals. The pumping type relies on the suction pump on the top to suck the surrounding air into the inside to be detected by the sensor module and output signals. Therefore, the diffusion type measurement speed is slower but the data is more real, the pumping type measurement speed is fast but the value is affected by the suction pump. Users can choose according to their own needs.
Features:
Power supply: DC3.7V (Lithium battery capacity 3000mAh)
Working environment: -10℃-50℃, <95%RH without condensation
Explosion-proof mark: Ex ib IIB T3 Gb
Charging time: 6h-8h
Standby time: more than 8h continuous
Response time: Diffusion type≤60S
Alarm function: sound, light, vibration
Gases detected: Ozone, Carbon dioxide
Price: $114~$142.5 (according to different gases)
5. Fixed gas detector
This is a typical explosion-proof gas detector, which is mostly used for the monitoring of flammable and explosive gases in industrial sites. The overall appearance is made of stainless steel, with a high explosion-proof grade, and is certified by the National Institute of Metrology. This fixed gas detector detects a single gas, but the measurable gas range is wide, and there are multiple ranges to choose from, which can greatly meet the needs of most users. When in use, the gas concentration can be monitored continuously for a long time. Once the gas concentration exceeds the standard, it will send out a double sound and light alarm to remind the user to take measures. In addition, this gas detector adopts remote infrared remote control technology, which can modify parameters without disassembly, which is more convenient and efficient.
Features:
Power supply: 10~30V DC
Output signal: rs485, 4~20mA, 0~5V, 0~10V
Working temperature: -20~50℃
Working humidity: 15~90%RH non-condensing
Explosion-proof mark: Ex d IIC T6 Gb
Alarm function: sound, light
Gases detected: Carbon monoxide, tvoc, Hydrogen, hydrogen sulfide, methane, nitrogen dioxide, sulfur dioxide, oxygen, ammonia, ozone, phosphine, sulfur hexafluoride, etc.
Price: $85.5~$228.5 (according to different gases)
6. Outdoor gas detector
This outdoor gas sensor adopts a solar radiation shield that can be used for long-term monitoring of outdoor environments. It is often used with weather stations to detect weather elements and gas conditions in the current environment. Multiple gas sensor modules can be placed inside a solar radiation shield, so multiple gas concentrations can be detected at the same time. Customers can freely match according to their own needs. The protection level of the solar radiation shield is IP68, which can effectively prevent rain and snow. Therefore, this gas detector has higher accuracy and stronger stability for outdoor gas detection.
Features:
Power supply: DC 10-30V
Maximum power consumption: 1.2W
Working environment: -10℃-55℃, 0~95%RH non-condensing
Signal output: RS485
Product material: ABS
Protection level: IP68
Gases detected:TVOC, formaldehyde, ozone, carbon monoxide, methane, oxygen, sulfur dioxide, nitrogen dioxide, hydrogen, hydrogen sulfide, ammonia.
Price: $64.6~$1194.9 (according to different gases)
7. Smart single gas detector
This small gas detector is also a device for measuring the concentration of a single gas. It mainly meets users who have high requirements for aesthetics. The overall appearance is square and bright white, and it is elegant to install indoors. Using standard Modbus protocol, the transmission signal is stable and the measurement accuracy is high. This smart gas detector is highly customizable, the gas and range that measured can be customized according to user needs. In addition, it adopts remote infrared remote control technology, and the parameters can be modified without disassembly. When the concentration exceeds the preset alarm value, an audible and visual alarm signal will be issued to remind the user to take safety measures in time.
Features:
Power supply: 10~30V DC
Output signal: rs485
Product material: ABS
Alarm function: sound, light
Gases detected:Hydrogen, carbon monoxide, hydrogen sulfide, methane, nitrogen dioxide, sulfur dioxide, oxygen, ammonia, phosphine, ozone
Price: $46.2~$304.1 (according to different gases)
8. All in one gas detector
This multifunctional gas detector is currently the most powerful gas detection equipment. Its measurement elements include temperature, humidity, PM2.5, PM10, air pressure, light, TVOC, CO2, formaldehyde, O3, CO, CH4, O2, SO2, NO2, H2, H2S, NH3, etc. You can choose 11 kinds of random combinations. Support wifi and rs485 two signal output. The built-in gas module uses electrochemical and catalytic combustion sensors, which have excellent sensitivity and repeatability. Suitable for customers who need to monitor multiple elements on important occasions. The only disadvantage is that the gas detector itself does not have a data display screen, and customers need to view the data in real-time through a free platform or mobile APP.
Features:
Power supply: DC 10-30V
Working environment: -10℃-55℃, 0~95%RH non-condensing
Signal output: WIFI, RS485
Product material: ABS
Gases detected: PM2.5, PM10, TVOC, carbon dioxide, formaldehyde, ozone, carbon monoxide, methane, oxygen, sulfur dioxide, nitrogen dioxide, hydrogen, hydrogen sulfide, ammonia,etc.
Price: $83.9~$679 (according to different gases)
What should I pay attention to when buying a gas detector?
1. Gas type
It is important to understand which gases can and cannot be detected by the equipment. Some detectors can identify more than one type of gas, and some can detect smoke. But don’t make the mistake of assuming that the CO detector can also detect a natural gas leak: unless it specifically says it will detect it, or it won’t.
2. Application place
Know the purpose of buying a gas detector and what you are buying a gas detector for. The more detailed the better. To understand the use environment of the gas detector, it is necessary to know clearly what is the use environment of the gas detector, such as the temperature, humidity, pressure, wind speed, wind direction, whether there is dust, whether there is electromagnetic interference, whether it is corrosive, whether there is other gas interference and so on.
3. Measurement accuracy
What are the special requirements for the accuracy, range, resolution and other performance of the gas detector?
4. Certification
Requirements for gas detector certification, such as CE certification, fire protection certification, 3c certification, explosion-proof certification, UL certification, etc.
What should be paid attention to when installing a gas leak detector?
1. Installation location selection
We need to know the distribution of on-site working conditions and where the gas is generated, such as pipe joints, valves, raw material locations, and airflow direction. These are things that we need to consider carefully. It doesn’t mean that you just need to find a place to install it. If it is installed in the wrong place, the gas detector will not be effective.
2. Installation environmental conditions
Gas detectors all have their own suitable working conditions, and they mainly need to pay attention to the basic conditions of humidity, temperature, and pressure. In the general factory environment, it can be directly installed and fixed, but when we install it in a confined space, such as a pipe, a flue, and other special environments, we must strictly control the working conditions. The conditions that most gas detectors can adapt to are: temperature: -20 to 50 degrees, humidity below 90% without condensation, and pressure within the range of 100kp. Once the environmental conditions are not met, it will affect the accuracy of the measurement and the service life of the instrument. At this time, we have to consider adding gas pretreatment equipment to carry out gas treatment, so that the gas that meets the conditions can enter the gas sensor head.
If the dust in the gas is too large, it will also cause the gas sensor of the gas sensor to adsorb and block, and the detection accuracy will decrease. Therefore, once it is used in a high dust environment, the dust must be filtered, and the dust must be cleaned regularly according to the situation. Please remember not to wash with water or use alcohol or other solvents to wipe, only use a clean soft cloth to clean the surface of the detector.
