A: Choose the appropriate model based on your usage scenario and functional requirements. Of course, the best way is to ask us (your best gas detection experts).

A: Be aware of the cross-sensitivity between different toxic gases, such as the cross-sensitivity between carbon monoxide and hydrogen, or between ammonia and hydrogen sulfide.

A: Multi-gas detectors can detect multiple gases simultaneously, improving industrial safety; single-gas detectors detect only one gas, making them suitable for specific environments.

A: Yes, most models support sensor replacement, and different types of gas sensors can be used depending on the detection requirements.

A: Prices range from tens to hundreds of dollars depending on the model, number of sensors, explosion-proof rating, and functions. OEM customization is available at a different price.

A: Regularly cleaning the casing, checking the sensors, calibrating according to the manufacturer's requirements, and avoiding moisture or strong vibrations can extend the lifespan of the device.

A: Most models support data logging, alarm logging, and export functions, which facilitates job analysis and safety compliance.

A: It typically uses a rechargeable lithium battery, with a continuous working time of 12–24 hours, depending on the model.

A: Choose an ATEX or IECEx explosion-proof certified model based on the working environment to ensure safe use in flammable and explosive areas.

A: Portable and lightweight, it can be carried around and is suitable for individual or small-scale operations; fixed installation in a fixed location is suitable for continuous monitoring.

A: Portable gas detectors are suitable for both industrial operations and personal safety use. For industrial environments (chemical plants, mines, oil and gas facilities), it is generally recommended to use an all-in-one industrial-grade portable gas detector, which features multi-gas monitoring, alarm, and data logging capabilities.

A: Yes, portable gas detectors are equipped with audible, visual, and vibration alarms. When the concentration of a hazardous gas exceeds a set threshold, it will immediately alert the user, helping to quickly evacuate the danger zone. Some models also support data logging and wireless transmission, enabling remote monitoring.

A: Portable gas detectors can generally operate in environments ranging from -20°C to +50°C (please refer to the product manual for specific models). High or low temperatures may affect the sensor's response speed and accuracy; therefore, for use in extreme environments, industrial-grade temperature-resistant models should be selected.

A: Portable gas detectors typically require regular zero-point calibration and gas calibration: Zero-point calibration: Adjusting the instrument's zero point in a clean air environment. Gas calibration: Correcting the instrument's accuracy using a standard calibration gas. It is recommended to calibrate every 180 days or according to the manufacturer's instructions to ensure instrument reliability.

A: The lifespan of a portable gas detector depends on the model, sensor type, and operating environment. Generally: Oxygen/combustible gas sensors have a lifespan of approximately 2–3 years. Electrochemical sensors (CO/H2S, etc.) have a lifespan of approximately 1–2 years. Battery lifespan is typically 12–36 months. Regular calibration and maintenance can extend lifespan and ensure detection accuracy.

A: portable gas detector is a small, portable gas detection device used to monitor the concentration of harmful gases in industrial environments, such as combustible gases, oxygen, hydrogen sulfide, or carbon monoxide. It is typically used in hazardous environments such as mines, chemical plants, oil and gas stations, and confined spaces to help ensure personnel safety.

A: High-end models allow remote viewing, alarm logs, and trend analysis via cloud or SCADA systems.

A: Yes, multi-gas fixed detectors can monitor oxygen, combustible, and toxic gases simultaneously.

A: Sensor lifespan is typically 2–3 years, depending on type and environment. Regular inspection required.

A: Prices vary from tens to hundreds or thousands of USD depending on gas type, sensor quantity, explosion rating, and features.

A: Suitable for outdoor use with weatherproof, dustproof, waterproof models. Consider wind and sunlight exposure.

A: OEM/ODM customization available for housing, protection level, sensor type, and interfaces.

A: Clean probes, check sensors and alarms, calibrate per manufacturer, avoid corrosive gases contact.

A: Supports 4–20mA output, RS485, Modbus, integrating with PLC, DCS, or SCADA systems.

A: Most models are IP65/IP66 rated, dustproof and waterproof, suitable for harsh environments.

A: Common in oil & gas, chemical, mining, storage tanks, pipelines, and labs.

A: Multi-point detection systems or sensor networks allow monitoring multiple hazardous points simultaneously.

A: Supports audible, visual, and remote alarm outputs. When gas exceeds limits, alarms trigger and can link to ventilation or DCS.

A: Perform zero calibration and gas calibration using standard gas. Recommended every 6–12 months.

A: Oxygen/combustible gas sensors last 2–3 years, electrochemical sensors 1–2 years. Regular calibration and maintenance extend lifespan.

A: Choose ATEX or IECEx certified models according to the hazardous area for safe use.

A: Most are powered by 24V DC industrial power; some models support battery or PoE (Power over Ethernet) supply.

A: High-end models support RS485, Modbus, 4–20mA output, or wireless transmission, allowing integration with DCS/GDS/SCADA for remote monitoring.

A: Usually installed in areas where gas is likely to leak or accumulate, such as pipe joints, near valves, ceiling or floor. Placement depends on gas density.

A: It can detect combustible gases (methane, propane), toxic gases (CO, H2S), oxygen, and VOCs. Some multi-gas models can monitor several gases simultaneously.

A: A fixed gas detector is an industrial gas monitoring device installed at a site to continuously detect harmful or combustible gas concentrations, ensuring workplace safety.

A: We offer OEM/ODM customization services, allowing us to adjust casing color, display interface, sensor combination, and packaging according to customer needs. Suitable for brand companies or distributors seeking private label manufacturing.

A: Most portable gas detectors can detect multiple gas types, including:Combustible gases (such as methane, propane, ethane)，Toxic gases (such as carbon monoxide (CO), hydrogen sulfide (H2S))，Oxygen (O2)，Volatile organic compounds (VOCs) .Some multi-gas detectors can monitor 4–6 gases simultaneously, improving operational safety.

A: It is recommended to test the alarm at least once a month to ensure proper operation.

A: If the model detects CO, it can replace a CO alarm; otherwise, a separate CO detector is required.

A: Standard detectors work standalone; smart models connect to a phone app for remote monitoring and alerts.

A: Advanced models use smart sensor algorithms to prevent false alarms from steam, cigarette smoke, or kitchen fumes.

A: When hazardous gas is detected, it sounds audible and visual alarms until gas concentration returns to safe levels or manually reset.

A: Yes, kitchen gas detectors are designed to detect natural gas or coal gas leaks, protecting household safety.

A: Natural gas is lighter than air, install 30–60 cm below ceiling; CO is similar to air density, install at breathing height 1.2–1.5 meters.

A: Yes, home gas detectors can detect LPG, including propane and butane leaks.

A: Most home gas detectors are DIY-friendly; follow the manual to mount on walls or ceilings, paying attention to safe power connections.

A: Prices range from $10 to $150 depending on gas type detection, alarm method, and smart features.

A: Some smart models support Wi-Fi or Bluetooth for smartphone apps, enabling remote monitoring and alerts.

A: Regularly clean the sensor surface to prevent oil or dust buildup; test alarm functionality according to the manual to ensure proper operation.

A: Sensors typically last 3–5 years; batteries or internal power need periodic replacement depending on the model to ensure reliable monitoring.

A: Yes, most home gas detectors detect CO to prevent carbon monoxide poisoning from stoves or water heaters.

A: Modern home gas detectors use smart algorithms and dual-sensor technology to minimize false alarms, such as preventing steam from triggering alerts.

A: Supports audible and visual alarms. Some models also send alerts to smartphones when gas levels exceed safety limits.

A: Most are powered by 220V AC or 110V AC; some models use battery or rechargeable power for flexible installation.

A: Recommended installation locations are kitchens, near gas water heaters, or gas pipelines. Methane detectors should be near the ceiling, CO detectors at breathing height.

A: Common gases include natural gas (methane), LPG (propane, butane), and carbon monoxide (CO). Some models also detect VOCs.

A: A home gas detector is a safety device installed in homes to detect natural gas, LPG, or carbon monoxide leaks, ensuring family safety.

A: The core process is: 1. Demand communication: the customer puts forward customized requirements (gas type, function, appearance, quantity, etc.); 2. Scheme design: we issue a preliminary design scheme and quotation; 3. Scheme confirmation: both parties negotiate, optimize and confirm the scheme, and sign a cooperation contract; 4. Advance payment: the customer pays the advance payment; 5. Sample production and confirmation: we make samples and send them to the customer for confirmation; 6. Mass production: after the sample is confirmed to be qualified, start mass production; 7. Finished product testing and delivery: after the product passes the test, the customer pays the balance, and we arrange logistics delivery; 8. After-sales support: provide warranty and lifelong technical support.

A: Yes, we will keep them strictly confidential. We will sign a formal Non-Disclosure Agreement (NDA) with the customer to clarify the confidentiality obligations of both parties; during the cooperation process, we will strictly keep the design scheme, technical parameters, commercial information provided by the customer confidential and will not disclose them to any third party, so as to protect the core rights and interests of the customer.

A: Yes. We will continuously track the customer's product use feedback and changes in market demand, and provide customers with product secondary upgrading and function iteration services, including hardware upgrading (such as sensor replacement, performance optimization) and software upgrading (such as function expansion, data algorithm optimization), to help customers improve product competitiveness.

A: Yes. For old customers' additional orders, there is no need to redesign the scheme and make samples, and the production cycle can be shortened by more than 30%; at the same time, based on the long-term cooperative relationship, we will provide a more competitive price, which is specifically determined through negotiation according to the quantity of additional orders.

A: Yes. We will provide customers with training materials such as product user manuals (Chinese and English bilingual) and operation videos; at the same time, we provide lifelong free technical support, including product operation guidance, troubleshooting, software upgrading and other services to ensure that customers can use the products smoothly.

A: Customers can contact our after-sales team by email, phone, etc. to feedback product problems and provide relevant certificates (such as product photos, testing reports); we will respond within 24 hours and provide solutions such as remote technical guidance, free repair or replacement of accessories according to the problem situation.

A: Yes, we provide warranty service. The conventional warranty period is 1 year. If the product has non-human quality problems within the warranty period, we will provide free repair or replacement services; after the warranty period, we provide lifelong repair services, only charging the cost of parts.

A: The logistics cost is borne by the customer by default. We can select an appropriate logistics method and provide a quotation according to the customer's needs; if the order amount reaches the agreed threshold, it can be negotiated that we shall bear part or all of the logistics cost.

A: We can provide a full set of documents required for customs clearance (such as commercial invoice, packing list, bill of lading, product testing report, certification certificate, etc.) to assist customers in completing customs clearance; if customers need, we can also entrust professional customs clearance agents to be responsible for customs clearance matters, and the relevant fees shall be borne by the customers.

A: Yes. It supports the printing of packaging text in multiple languages such as English, Spanish, French, German, Arabic, etc., to meet the language needs of different target markets. Customers need to provide clear text content and typesetting requirements.

A: Yes. We can customize product packaging according to customer needs, including packaging box material, size, printed content (such as customer brand LOGO, product parameters, user manual), etc.; the packaging design will consider transportation safety and use shockproof and moisture-proof packaging materials to avoid product damage during transportation.

A: We implement the ISO9001 quality management system standard and have established a full-process quality control system, covering raw material procurement inspection, production process patrol inspection, semi-finished product testing, finished product factory full-item testing and other links; each product must pass strict performance testing and aging testing before leaving the factory to ensure stable product quality.

A: Yes. All our customized products use environmentally friendly raw materials and strictly follow international environmental standards such as RoHS and REACH. We can provide relevant environmental testing reports to ensure that the products are legally sold in the target market.

A: If it is a customer's exclusive customized scheme (non-general scheme), the certification cost shall be borne by the customer; if it is a mature ODM scheme provided by us and the customer's batch is large, it can be negotiated that both parties shall bear it jointly.

A: Yes. Our customized products can apply for and pass relevant international certifications according to the requirements of the customer's target market, including ATEX, IECEx, UL, CE, CSA, etc.; the certification cost and cycle depend on the certification type, which will be clarified with the customer at the initial stage of cooperation.

A: Yes. We welcome customers to conduct on-site inspections of the factory during the production process to understand the production progress and quality control process; if customers need supervision, they can communicate with us in advance, and we will arrange special personnel to connect and cooperate with customers to complete the supervision work.

A: After the sample is confirmed to be qualified, the mass production cycle depends on the order quantity: 10 working days for 50-200 units; 20 working days for 200-500 units; more than 500 units can be determined through negotiation, and we will try our best to ensure the delivery time.

A: Yes. If the customer has designated sensors, displays, batteries and other accessories, we can provide integration services on the premise that the accessory specifications meet the product design requirements; we will conduct comprehensive performance tests on the integrated products to ensure stable operation of the products.

A: If the sample does not meet the customer's needs, we will optimize the design scheme for free and re-make the sample according to the problems feedback by the customer until the sample meets the customer's requirements; the cycle of re-making the sample depends on the optimization difficulty, generally 3-7 working days.

A: Yes. After the design scheme is confirmed by both parties, we will start sample production. The conventional sample production cycle is 7-15 working days; after the samples are completed, they will be sent to the customer for verification of appearance, function, performance, etc., and mass production will be carried out after the customer confirms that they are qualified.

A: For conventional customization needs (such as fine-tuning of existing schemes), we will provide a preliminary design scheme within 2 working days; for ODM new R&D needs, we will complete demand analysis and issue a preliminary scheme framework within 7 working days, and gradually refine it later.

A: Yes, they can be flexibly adjusted. Core functional modules such as detection range, alarm threshold, response time, data storage capacity, etc. can be customized; optional functions include Bluetooth/Wi-Fi/GPRS communication, GPS positioning, acousto-optic alarm, data export (USB/SD card), etc.

A: Yes, we do. We have a professional industrial design team that can customize product appearance shape, size, color, key layout, etc. according to customer needs, and can also provide appearance design schemes for customers to choose; in terms of structure, we can optimize the product's waterproof, dustproof and explosion-proof levels to adapt to special installation environments.

A: It can be customized to detect 1-16 types of gases, including flammable gases (such as methane, propane), toxic and harmful gases (such as hydrogen sulfide, carbon monoxide, chlorine), oxygen, VOCs, etc. It supports matching corresponding sensors according to the customer's specific application scenarios.

A: An advance payment is required to ensure the smooth progress of raw material procurement and R&D design. The conventional advance payment proportion is 50%, which is specifically determined through negotiation according to the customization difficulty and order amount. The balance is paid after the product passes the acceptance inspection.

A: The MOQ for OEM customization of conventional models is 10 units; the MOQ for ODM new R&D customization is 100 units; the MOQ for special needs (such as exclusive appearance mold opening) can be adjusted through negotiation, and the larger the batch, the more advantageous the unit price.

A: Yes, we specialize in the full-process OEM/ODM customization services for gas detectors. We can customize product appearance, functions, measuring range, communication methods, etc. according to customer needs, covering the entire product series such as portable and fixed types.

A: Portable detectors are suitable for inspections or personal safety, fixed detectors for continuous industrial monitoring.It's best to use both together.

A: Choose based on gas type, concentration range, installation environment, explosion rating, and network connectivity.

A: Multi-gas detectors can monitor both combustible and toxic gases simultaneously for enhanced safety.

A: Catalytic sensors last 3–5 years, infrared sensors up to 5–10 years; regular calibration extends lifespan.

A: Yes, multi-gas detectors can monitor natural gas, LPG, hydrogen, and other combustible gases simultaneously.

A: When gas concentration reaches the alarm threshold, the device triggers audible and visual alarms and can send relay or remote alerts.

A: Industrial plants, gas stations, kitchens, storage tanks, pipelines, and other areas prone to combustible gas leaks.

A: ommon gases include natural gas (methane), LPG (propane, butane), and hydrogen.

A: Combustible gases are gases that can burn when exposed to fire in air, such as methane, propane, and butane.

A: Semiconductor sensors are typically used for leak detection, but prolonged exposure to high concentrations of gas can quickly damage them. Catalytic combustion sensors are the most common, but there are no good solutions for detection ranges exceeding 100% LEL. Infrared sensors can detect the entire range from 0-100% VOL, but they are very sensitive to humidity changes and are unsuitable for humid environments. Laser sensors offer excellent performance but are very expensive. The choice of sensor depends on the specific application scenario and requirements.

A: Semiconductor sensors typically detect leaks from 0 to 10,000 PPM and are used to detect small leaks. Catalytic combustion sensors typically detect leaks from 0 to 100% LEL (the most common range), while infrared sensors typically detect leaks from 0 to 100% VOL. Laser sensors detect leaks from 0 to 50,000 PPM or 0 to 100,000 PPM and are commonly used for telemetry.

A: The detection principles of combustible gas detectors include: catalytic combustion, semiconductor, laser, and non-dispersive infrared.

A: Yes,Multi-point detection networks allow monitoring multiple hazardous points simultaneously for enhanced safety.

A: Advanced models use smart algorithms and dual sensors to reduce false alarms from steam, odors, or humidity.

A: Prices range from $100–$1000 depending on gas type, sensor number, explosion rating, and features.

A: Yes, but select waterproof, dustproof, weatherproof models and consider wind direction impact.

A: Yes, multi-gas detectors can monitor both toxic and combustible gases.

A: There are portable detectors for personal safety and fixed detectors for continuous industrial monitoring.

A: Perform zero calibration and standard gas calibration every 6–12 months to ensure accuracy.For detailed calibration procedures, please contact us.

A: High-end models support RS485, Modbus, or wireless connectivity for integration with DCS/SCADA for remote monitoring.

A: Yes, multi-gas models can simultaneously monitor CO, H2S, NH3, Cl2, and other toxic gases.

A: When gas concentration exceeds the set threshold, the detector triggers audible and visual alarms; some models support vibration or remote alerts.  

A: Industrial plants, chemical plants, sewage treatment plants, oil refineries, mines, and laboratories are all places where toxic gases are easily generated and where people are present.

A: Common toxic gases include CO (carbon monoxide), H2S (hydrogen sulfide), NH3 (ammonia), Cl2 (chlorine), NO2 (nitrogen dioxide), etc.

A: Alarm thresholds for toxic gases are typically set based on Occupational Exposure Limits (OELs). The primary alarm threshold for toxic gases should be less than or equal to 100% OEL; the secondary alarm threshold should be less than or equal to 200% OEL, but should not exceed 10% IDLH（Immediately Dangerous to Life or Health concentration）.All practitioners in related fields should treat toxic gases with seriousness and caution, as this concerns the safety of lives.

A: Toxic gases are harmful gases that can cause poisoning or health hazards even at low concentrations, such as carbon monoxide (CO) and hydrogen sulfide (H2S).

A: You must consider the Total Cost of Ownership (TCO), including the replacement frequency and price of sensors, the cost of standard gas for regular calibration, and the potential risk costs associated with maintenance downtime.

A: A bump test is a quick "check-up" using standard gas to verify alarm functionality, whereas calibration is the "treatment" that adjusts the sensor readings to ensure accuracy; both need to be performed regularly.

A: It depends on the specific gravity of the target gas: detectors for gases lighter than air (like methane) should be mounted above the potential leak source, while those for heavier gases (like hydrogen sulfide) should be installed near the floor.

A: Diffusion relies on the natural flow of gas to reach the sensor, making it suitable for personal wear; pumped sampling uses a built-in micro-pump to actively draw in air, which is ideal for remote sampling before confined space entry or detecting dead spots in pipelines.

A: Intrinsic Safety" means the device's circuitry is designed to limit energy, ensuring it cannot generate sparks or heat sufficient to ignite flammable gases; this is a mandatory safety requirement for working in hazardous areas like oil and gas or chemical plants.

A: You need to verify the instrument's explosion-proof rating (e.g., Ex certification for petrochemicals), Ingress Protection rating (e.g., IP65+ for outdoors), and gas density (which determines probe installation height).

A: You must use a multi-gas composite detector with a built-in sampling pump to extract gas from different depths externally before entry, simultaneously monitoring oxygen, combustibles, and specific toxic gases.

A: Range selection depends on safety thresholds; toxic gases usually require low ranges (e.g., 0-100ppm) for personnel safety, while combustible gases typically use 0-100% LEL (Lower Explosive Limit).

A: Choose portable units for personnel patrols, confined space entry, or emergency response, while fixed systems should be installed for 24/7 continuous monitoring of specific areas like pipelines or tank farms.

A: Catalytic combustion or infrared sensors are preferred for combustible gases, electrochemical sensors are typically used for toxic gases (like CO, H₂S), and photoionization detectors (PID) are required for VOCs.

A:  Common output methods include 4-20mA analog signals, RS485 digital signals (Modbus protocol), and wireless transmission (such as 4G). The 4-20mA signal is suitable for long-distance transmission with strong anti-interference capability and is often used to connect to PLC or DCS systems; RS485 supports multi-device networking, making it ideal for centralized monitoring; wireless transmission facilitates remote data viewing and mobile monitoring. Selection depends on on-site cabling conditions and system integration needs; for example, chemical plants may prioritize explosion-proof 4-20mA outputs.

A: Sensor lifespan is typically 1-3 years; electrochemical sensors have a shorter life (2-3 years), while infrared sensors can last over 5 years. The calibration interval is generally 6-12 months, requiring two-point calibration with standard gases to ensure accuracy. Regular maintenance extends the instrument's life, prevents data drift caused by sensor aging, and ensures compliance with regulations (such as the "Work Safety Law" which mandates regular testing of safety equipment).

A: The IP rating indicates the instrument's dust and water resistance; for example, IP66 means it is completely dust-tight and can withstand powerful water jets, making it suitable for high-dust and high-humidity environments. Explosion-proof certifications (such as ATEX or IECEx) are mandatory for use in explosive gas atmospheres, ensuring the instrument does not generate sparks or high temperatures that could trigger an explosion. For instance, petrochemical facilities require explosion-proof equipment rated Exd II CT6 Gb.

A: Response time (T90) is the time required for the instrument to display 90% of the final concentration value after exposure to the gas, while recovery time is the time it takes to return to the baseline level after removal from the gas environment. These parameters directly impact the timeliness of safety warnings. For example, in a leak incident, a fast response (e.g., T90 ≤ 20 seconds) can buy critical time for personnel evacuation. A short recovery time means the instrument is ready for the next detection sooner, improving monitoring efficiency.

A: The measurement range refers to the concentration span the instrument can detect and must cover the minimum and maximum concentrations possible in the environment. For instance, the range for combustible gases is typically 0-100% LEL (Lower Explosive Limit), while for toxic gases like carbon monoxide, it might be 0-1000 ppm. Accuracy refers to the deviation between the measured value and the true value, usually expressed as a percentage of Full Scale (%FS), such as ±2% FS. Selection should be based on the sensitivity required by the application scenario; safety alarm scenarios may require higher accuracy.

A: Apply a test gas that triggers the low and high alarm thresholds to verify the local sound and light alarms. Simultaneously, check the control room panel or PLC system to ensure the signal is transmitted correctly and triggers the interlock actions (such as activating exhaust fans or shutting off valves).

A: Zero calibration is performed in fresh air to establish a baseline, while span calibration uses a standard gas sample with a known concentration (typically 50% of the full scale) to adjust the sensor's sensitivity. The flow rate of the standard gas should be controlled (e.g., 0.5 L/min), and the reading must stabilize before confirming the calibration.

A: Before powering on, verify that the wiring is secure and the insulation resistance meets requirements. Check that the power supply voltage matches the device rating (e.g., 24V DC) and ensure there are no short circuits. Also, confirm that the detector is firmly mounted and the sensor protective cap has been removed if required.

A: Use shielded twisted-pair cables (e.g., RVVP) to prevent signal interference, and ensure the cable cross-section meets the voltage drop requirements (typically ≥1.0mm²). The wiring must be routed through metal conduits or cable trays, and strictly follow the terminal diagram for 4-20mA or RS485 connections to avoid polarity reversal.

A: The location should be selected based on the gas density relative to air and the potential leak sources. For gases heavier than air (e.g., H₂S), install the detector 30-60cm above the ground; for lighter gases (e.g., Methane), install it above the leak source. Avoid installing near vents, high humidity areas, or locations with strong electromagnetic interference.

A: Natural gas is lighter than air and accumulates near the ceiling, whereas LPG is heavier than air and settles in low-lying ground areas.

A:  Different gas sources have distinct calorific values, pressures, and combustion speeds, so interchanging them can lead to incomplete combustion or safety hazards.

A: Coal-type gas originates from the coalification of organic matter in coal-bearing strata, while biogenic gas is produced by the microbial decomposition of organic matter at low temperatures.

A: LNG is natural gas converted into liquid form via ultra-low temperatures, while CNG is natural gas compressed into a high-pressure gaseous state.

A: Cross-sensitivity occurs when a sensor responds to a gas other than the target gas, leading to false readings. For example, a Carbon Monoxide sensor might also react to Hydrogen. It is crucial to consult the sensor's specification sheet to understand potential interference in mixed-gas environments.

A: he installation height depends on the gas density relative to air. Detectors for gases lighter than air (like Hydrogen or Methane) should be mounted near the ceiling or above the leak source. Detectors for gases heavier than air (like Chlorine or Propane) must be installed close to the floor or ground level.

A: LEL (Lower Explosive Limit) is the minimum concentration of a combustible gas in air that can ignite, typically measured from 0-100% LEL. PPM (Parts Per Million) is used for toxic gases where even trace amounts are dangerous, representing a much smaller concentration scale (e.g., 0-50 ppm for H₂S).

A: Catalytic Bead sensors are standard for most combustible gases, while Infrared (IR) sensors are ideal for hydrocarbons in low-oxygen environments. Electrochemical sensors are used for toxic gases and oxygen, and Photoionization Detectors (PID) are required for Volatile Organic Compounds (VOCs).

A: Industrial gases are primarily categorized into three types: Combustible Gases (e.g., Methane, Hydrogen) which pose explosion risks; Toxic Gases (e.g., Carbon Monoxide, Hydrogen Sulfide) which threaten health even at low concentrations; and Asphyxiant Gases (e.g., Nitrogen, Carbon Dioxide) which displace oxygen and cause suffocation.