GasDog Gas Detection Case Studies

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Chlorine (Cl2) Gas Detector

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Ethylene (C2H4) Gas Detector

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Formaldehyde (CH2O) Gas Detector

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Hydrogen (H2) Gas Detector

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Hydrogen Cyanide (HCN) Gas Detector

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Hydrogen Sulfide (H2S) Gas Detector

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Nitrogen (N2) Gas Detector

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Oxygen (O2) Gas Detector

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Ozone (O3) Gas Detector

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Sulfur Dioxide (SO2) Gas Detector

1. Chlorine Detection in R&D of Special Gas Products

A Gas Co., Ltd. is a company that focuses on the research and development and production of electronic special gas products. It provides special gas products and services for high-tech industries such as semiconductors, displays, optical fibers and solar energy. One of the gases is Chlorine. Cl2 is yellow-green at room temperature and pressure. It is a toxic gas with a strong pungent odor. China's workshop air hygiene standard is MAC 1 mg/m³. The Chlorine produced by the user is filled with cylinders, and there is a special storage room for gas cylinders. The user wants a portable instrument that allows personnel to test for leaks before entering. The production workshop also needs to measure the concentration at ordinary times. Once a leak is found, ventilation measures must be taken immediately and the source of the leak must be found.

We recommend that users use the pump suction GD200-CL2 gas detector to detect this toxic gas, because the relative reaction speed is faster, and the gas concentration can be detected at a longer distance, which protects the safety of the staff to a greater extent. The final user purchased this portable gas detector.

Cl2 gas detection

1. GD200-C2H4 Gas Detector for University Experimental Research

Ethylene exists in small amounts in plants and is a metabolite of plants. It is a colorless and flammable gas that can slow down plant growth, promote leaf fall and fruit ripening. Zhang, a graduate student at the university, contacted us and asked us to accurately detect the concentration of C2H4 during the experiment in order to control the progress of the experiment. They needed to detect the Ethylene concentration produced by peaches in the experimental container. When confirming the range, they also confirmed it many times. After the project teacher confirmed it, I gave the confirmed parameters. At the same time, the volume of their experimental container was very small, only 20*15*30cm in size (equivalent to the size of a lunch box).

Because the volume was too small, we gave a solution for this detection environment, which was a needle hose loop detection (letting the gas enter the instrument gas chamber and then send it back to the experimental container to be tested). Only such a solution can accurately and stably detect the concentration of C2H4 in the container. Otherwise, the gas will be exhausted all at once, and the detection data cannot be stable.

Zhang and his project teacher were very satisfied with this solution, they chose the GD200-C2H4 gas detector. They also recommended GasDog gas detectors to other college laboratories to detect Ammonia, Chlorine, and exhaust gas.

Ethylene gas detection

1. Testing Formaldehyde Removal with GD200-CH2O Detector

Manager Liu of Environmental Protection Intelligent Wall Materials Company contacted GasDog and now needs to do experiments before mass production of paint to test whether their paint meets the standard of Formaldehyde removal. First, they will put a CH2O stick in a bottle and use our gas detector to detect it. The CH2O concentration will be around 0.25ppm, and then put in the Formaldehyde-removing paint, and put the gas detector into the bottle again. At this time, the Formaldehyde gas concentration will slowly decrease.

According to the needs of customers and the particularity of CH2O gas, we recommended the GD200-CH2O pump-type Formaldehyde detector to customers, with a range of 0-5ppm, and instructed customers to turn on the machine in clean air. After use, wait until the reading drops to 0 before turning it off, because CH2O has strong adsorption. If you turn it off when there is still Formaldehyde reading, the CH2O gas will be adsorbed inside the instrument, and the test data will be inaccurate when it is used next time. Manager Liu agrees with the professional ability of the GasDog team.

CH2O gas detection

1. Hydrogen Leak Detection in Glass Production

A glass company mainly produces architectural glass, automotive glass, decorative glass, fiberglass, glass containers and tableware, and processed glass (offline coating). To prevent the leakage of toxic and harmful gases involved in the processing and production of glass and its glass products, this company has purchased hundreds of GasDog GD300-NH3 and GD300-H2 fixed online gas detectors, which mainly detect NH3, H2 and other gases. Installing gas detector alarms can not only prevent fires and improve the company's emergency rescue capabilities, but also create a good corporate social image.

The fixed online gas detector and alarm controller purchased by the customer mainly feed back the detected current data to its internal security monitoring network system through RS485 signals, and report to the relevant national safety supervision system. The main factors considered by customers when purchasing gas detectors are affordable price, excellent product quality, outstanding cost performance, thoughtful service, simple operation, easy use, sensitive response, stable data, high measurement accuracy, low maintenance cost, and high credibility. During the cooperation of this project, several domestic and foreign gas detector manufacturers participated in the bidding, and GasDog finally won the bid.

Hydrogen gas detection

1. Hydrogen Cyanide Detection in Gold Plating Tank Production Line

As a professional group company producing flexible printed circuit boards, its advanced process technology makes the market share and various indicators of its company's products rank among the best in the world in the same industry. It’s gold plating tank production line uses Potassium Cyanide as raw material. Hydrogen Cyanide gas is a highly toxic gas and was used as a poison in World War II, so a GD300-HCN fixed gas detector should be installed.

The customer engineer proposed that the shell material of the probe should be corrosion-resistant titanium alloy. They responded that 316 stainless steel on site would also be corroded. Considering the cost of titanium alloy is very expensive, the price of the shell alone is tens of thousands, not including other costs, and the price that customers can accept is about 10,000, so the titanium alloy solution is not feasible.

We asked the customer what other materials are not corroded on site besides titanium alloy. He said that plastic is not easy to corrode. Considering the user's cost of use, we proposed that the shell be made of nylon and selected advanced sensors for HCN probes. The customer approved this solution and finally purchased 15 units. The customer wanted us to go on site to calibrate all their probes. Our engineers took the time to go to the site and calibrate each one. The customer was very positive about our brand.

HCN gas detection

1. Monitoring Hydrogen Sulfide Gas with Online Fixed Detector

The Bridgestone Group needed to monitor Hydrogen Sulfide gas 24 hours a day for the new sewage treatment plant, and the office 800 meters away could also view the data of eight monitoring points on site. GasDog recommended the GD300-H2S online fixed Hydrogen Sulfide alarm with display, sound and light alarm and a one-to-four-eight bus multifunctional color screen controller to the customer. In addition, each fixed detector is connected to two blowers in parallel through two sets of relays (once the H2S concentration is too high, the blower will automatically work and send air into the culvert). The customer had never used a fixed gas detector and a bus host before. GasDog marked the wiring of each fixed gas alarm before leaving the factory and made each fixed gas alarm correspond to each point before leaving the factory. The customer only needs to do simple wiring to easily complete the on-site installation.

H2S gas detection

2. Monitoring Waste Gas with GD300 Fixed Gas Detectors

Last October, an environmental protection company in East China needed a batch of online gas detectors to collect waste gas (mainly NH3 and H2S) and then discharge it into the atmosphere after centralized treatment. At the same time, before discharging it into the atmosphere, it was necessary to monitor the concentration of the waste gas after treatment. Because the person in charge of the company found us and told us their needs, we learned through further communication that the pressure at this detection position is slightly positive, and the humidity is also constant humidity and normal temperature. No pretreatment system is required. The back end can be directly connected to an external pump and then the instrument pipe is taken out to the chimney to draw the gas into the probe's air chamber for detection.

For this scenario, he was given a GD300 fixed series detector with a range of 0-100ppm. An NH3 and an H2S probe were installed at the same location to detect their respective concentrations in the waste gas. Engineer Lu thought this plan was good, so he first purchased 2 sets. After installation, he also took pictures of the site for me. Then he purchased 4 batches of NH3 and H2S detectors again, and he was very appreciative of GasDog's quality and service.

H2S gas detection

1. Enhancing Food Preservation with GD200-N2 Gas Detector Technology

An agricultural technology company mainly deals with the processing of fruits and nuts. Now, out of concern that the N2 concentration in the food packaging bag is not pure enough and will affect the food in the packaging bag, Nitrogen is used to replace oxygen. Nitrogen is a protective gas that can prevent food from rotting and preserve it for a long time. Manager Wang took a picture of the packaging bag they wanted to test for me. It was about 10*6*3cm in size. In addition to the N2 concentration, there was no O2 concentration allowed in the packaging bag, otherwise the food would go bad. We learned that the size of the food packaging bag was relatively small, so we recommended Manager Wang's GD200-N2 portable pump-suction gas detector, which was specially improved for the food packaging bag environment.

The front air inlet and outlet of the detector were equipped with needles, and the flow rate of the air pump was selected to be low flow, and then the needle was inserted into the packaging bag. When the air pump draws the gas in the packaging bag into the detector to react with the sensor, it will send the gas back to the food packaging bag to ensure that the gas in the food packaging bag will not be completely emptied. After explaining the working principle of this portable gas detector to Manager Wang, some samples of their food packaging were sent to us that day for us to test and take videos. After receiving the samples, GasDog tested them for the customer on the same day and sent a video. Manager Wang was very satisfied with our response time, service and quality, and immediately purchased a GD200-N2 detector.

O2 gas detection

2. Nitrogen Detection for Precision Engine Components

A company specializes in the development and production of piston products for fuel engines of various types of vehicles, with an annual output of 50 to 60 million units. At the same time, it has long-term friendly cooperation with many major brands of power locomotives. It is a strong precision enterprise in the industry. 3 years ago, due to the needs of product development and product quality inspection, they found GasDog and needed a portable N2 detector because their new product development would involve the production of Nitrogen, and there would be a Nitrogen generator that would continuously produce Nitrogen for a series of operations such as filling bottles, storage, processing and utilization. Among them, it is necessary to detect the purity of Nitrogen in the Nitrogen bottle to determine the performance and efficiency of the N2 generator.

After communicating with the technical person in charge of the company, they learned that they did not need a very high precision. Due to budget requirements, the most cost-effective GD200 series was recommended to the engineer, and he was assisted in choosing ordinary precision. After receiving the Nitrogen detector, the engineer found that he was not very good at operating it. Later, GasDog provided comprehensive after-sales support and suggested that they buy a flow meter and a pressure-reducing valve, and adjust the pressure to standard atmospheric pressure with a flow rate of 1000ml/min. Because the built-in pump of this portable Nitrogen detector can pump about 750ml of gas per minute, the flow rate needs to be slightly larger for more accurate detection. For after-sales, GasDog will do its best to help customers solve doubts and difficulties.

O2 gas detection

1. Advanced Oxygen Detection Solution for Complex Experimental Environments

To ensure the smooth progress of the experimental project, Mr. Zhang from the School of Environment of a certain university consulted on our platform about the portable Oxygen detector. Mr. Zhang told us that the experimental environment is more complex than the conventional detection environment, and there is water vapor and dust. The experimental container has a tube port, and the instrument needs to be equipped with a detection hose to extend the hose part into the container for sampling and collection. To ensure the accuracy, reliability and scientificity of the experimental data, Mr. Zhang consulted several gas detector manufacturers in detail and finally chose the GasDog detection solution.

In the communication with Mr. Zhang, it was learned that the Oxygen in the experimental box is not the normal content of 20.9% VOL in the atmospheric environment. The theoretical value of the O2 content in the experiment is roughly 10% VOL concentration. The alarm value of the instrument needs to be reset according to the experimental requirements. A large amount of water vapor and dust will be generated during the experiment, and preliminary drying and filtering treatment has been done. The recommended detection range is 0-25% VOL, and it is used with a filter tip to filter the water vapor and dust impurities generated in the experiment. The packaging detector works under tolerance conditions to extend its service life. In terms of the solution selection, Mr. Zhang finally decided on the GD200 portable pump suction sampling tester with a storage function, combined with a hose sampling and filter nozzle to filter dust.

2. Critical Oxygen Alarm Solutions for Industrial Safety

In June 2014, a nitrogen pipeline leak occurred in a factory, causing dozens of workers to be poisoned by hypoxia and suffer from varying degrees of hypoxia symptoms, which necessitated the purchase of oxygen alarms.

We offer two solutions to users

  • GD300-O2 with independent probe display and alarm.
  • Probe with display but no alarm. When the concentration is lower than 19.5% VOL, the relay switch is activated to start the separate alarm light alarm (the separate alarm light is customized by the customer).

O2 gas detection

1. Safety and Monitoring with Fixed Ozone Probes in Cosmetics Production

A great cosmetics company purchased our handheld Ozone detector at the end of 2016, and the effect was good. In July 2017, their purification project team contacted us and planned to install a fixed O3 probe in the disinfection room on each floor. The data of the probe was uploaded to the computer in real-time. They first purchased a set and tested it for a month. The data of the fixed probe was consistent with that of the handheld one. Later, more than 20 sets were purchased. Four fixed Ozone probes are installed on each floor. There are 5 floors in total. Each floor is equipped with a 4-channel host. The host outputs RS485 signals and then uploads the signals to the computer through the adapter. With this solution, customers can check the real-time concentration of the probe at any time.

O2 gas detection

2. Ozone Detection for Pharmaceutical Cleanroom Sterilization

The room of a pharmaceutical factory in California needs to be sterilized separately. According to the size of the room, an Ozone generator of a certain concentration is selected and installed directly in the room. The disinfection time is set according to the needs, and the machine will automatically shut down after the disinfection is completed. After the disinfection is completed, the room needs to be tested to see if it has achieved the effect. The pharmaceutical factory said that they are a Class 100 workshop, and the Ozone concentration reaches about 20ppm to meet the disinfection standard. It is to detect the Ozone concentration during the disinfection process. To know whether the Ozone concentration meets the requirements, there is no staff in the room.

According to the manager's description, the O3 concentration reaches 20ppm to meet the standard. GasDog recommends using 0-50ppm with storage and export functions. The instrument sets the storage interval time, such as storing a data in 5 seconds. During the disinfection process, the detector is placed in the disinfection room. After the disinfection is completed, the instrument is taken out, and the data is viewed in an Excel table through USB and printed out with a printer. The selected model is GD200-O3 single gas detector. Its working principle is that there is a sampling pump inside the instrument, which will actively suck the gas into the instrument for detection, with fast response speed and high accuracy. Because O3 is a toxic gas, it is more suitable to use a pump suction type to avoid Ozone poisoning incidents. After using it, customers said that the instrument is sensitive and accurate, suitable for their environment and can achieve their purpose.

O2 gas detection

1. SO2 Toxic Gas Detection in Paper Mill Pulp Pool

A paper company mainly produces and sells large-scale boxboard of various specifications. During the production process, the pulp pool will produce a large amount of toxic gases and combustible gases such as SO2, H2S, and CO. With a high sense of safety management and to ensure the personal safety of employees, Manager Wang of the company's occupational health supervision department found GasDog and immediately consulted our portable pump-type Sulfur Dioxide detector. During the communication, Manager Wang repeatedly emphasized that the purchase of the detector focuses on accuracy and sensitivity, and emphasized the concept of safety first and cost second. The pulp pool is generally sealed and will be opened for ventilation every three or four days. Employees need to enter the confined space in the pulp pool to check the operation of the equipment. Before entering, it is necessary to use a gas detector to detect the concentration of SO2, hydrogen sulfide, carbon monoxide and combustible gases in the pulp pool to ensure that the gas concentration in the inspection space is within the safe range that the human body can withstand.

After learning about the customer's purchasing needs in detail, we recommended the portable pump-suction gas detector GD200-SO2, which can be used with a hose to help employees collect gas in deep confined spaces where it is inconvenient to enter. This gas detector has a built-in sampling pump, fast sampling speed, and advanced sensors for accurate detection.

Recommended range:

  • SO2: 0-100PPM
  • H2S: 0-100PPM
  • CO: 0-1000PPM
  • EX: 0-100%LEL

At the same time, considering that the gas concentration is very high when the pulp pool is opened every few days, to prevent the gas concentration from being too high when it is just opened, causing the instrument to be used over the range and damaging the service life of the instrument, we gave Manager Wang the suggestion to ventilate for some time before testing.

SO2 gas detection