Hydrogen (H ₂) is increasingly widely used as a clean energy carrier and important industrial raw material in lithium battery manufacturing, chemical synthesis, metal heat treatment, and scientific research experiments. However, hydrogen has extremely low ignition energy and a wide explosion limit (4% -75% VOL). Once it leaks and accumulates in a closed or poorly ventilated space, it is highly prone to fire or even explosion accidents, especially in production processes such as lithium battery injection and chemical conversion. The generation and leakage of hydrogen are important safety risk sources. Therefore, continuous and reliable monitoring of hydrogen concentration is a part of safety production in related industries. The SGA-500 series fixed explosion-proof multi in one hydrogen gas detector is designed specifically to address complex risk scenarios, supporting simultaneous monitoring of up to four gases with hydrogen as the main component, providing a one-stop gas safety solution for high-risk areas.

1、 Product Overview
The SGA-500 series is an industrial grade fixed gas detector designed to monitor hydrogen (H ₂) concentration. The product adopts a modular design and can be flexibly configured as a 2-in-1, 3-in-1, or 4-in-1 model according to the on-site risk situation. While monitoring hydrogen gas, other combustible, toxic, or odorous gas detection channels (such as VOC, CO, etc.) can be added. The instrument adopts an explosion-proof structure, equipped with a high-definition LCD screen, supports sound and light alarms, relay linkage, and remote data transmission, and is suitable for industrial sites that require online monitoring of multiple gases simultaneously.

2、 Core Features

• Multiple tests on one machine, flexible configurationA host can integrate up to 4 types of gas sensors, with hydrogen monitoring as the core and flexible combination with other gas detection to meet the comprehensive monitoring needs in complex environments, saving installation space and costs.

• Focus on hydrogen safetyOptimization of the flammable and explosive characteristics of hydrogen gas, using high-sensitivity sensors to reliably monitor its concentration changes and prevent explosion risks.

• Explosion proof and sturdy designIndustrial grade aluminum alloy explosion-proof shell, protection level IP67, explosion-proof level Exd Ⅱ CT6 Gb, can be directly installed in Zone 1 and Zone 2 hazardous areas.

• Clear and intuitive displayThe 2.4-inch LCD screen displays the concentration, unit, status, and alarm information of multiple gases simultaneously.

• Intelligent alarm and linkageSupport independent setting of alarm thresholds for each gas, activate on-site sound and light alarms (volume ≥ 85dB) when exceeding the standard, and automatically link emergency equipment such as fans and exhaust valves through relays.

• Dual-mode signal transmissionSupports wired signals such as 4-20mA and RS485, as well as wireless transmission methods such as GPRS and WIFI (optional), making it easy to connect to factory DCS, PLC systems, or IoT platforms.

• Strong environmental adaptabilityOptional pipeline and flow sampling accessories, as well as specialized probes and filters for high temperature, high humidity, and high dust environments, can be selected to adapt to various installation conditions.

• Intelligent maintenance reminderEquipped with automatic reminder function for sensor lifespan and calibration cycle, supporting infrared remote control for non opening calibration and parameter setting, reducing long-term operation and maintenance costs.

3、 Main technical parameters

4、 Applicable scenarios
This instrument is particularly suitable for complex industrial environments where there is a risk of hydrogen leakage and may be accompanied by other gas hazards:

• Lithium battery manufacturingBattery cell injection workshop, chemical and aging room, battery pack assembly line, monitoring hydrogen and other organic gases generated by electrolyte evaporation.

• Chemical and Petrochemical IndustryHydrogenation reaction device, hydrogen storage and transportation pipeline, synthetic ammonia, methanol plant.

• Metal Heat Treatment and WeldingAnnealing furnaces, brazing and stainless steel welding areas using hydrogen as a protective gas.

• Electricity and EnergyHydrogen cooled generator room, fuel cell testing and production area.

• research laboratoryChemical synthesis, material experiments, and analytical testing laboratories involving the use of hydrogen gas.

• otherLimited spaces, underground pipe galleries, and industrial plants that may have multiple gas mixing risks.

V. Conclusion
The SGA-500 series all-in-one hydrogen detector combines specialized hydrogen monitoring with flexible multi gas expansion capabilities, providing an efficient and integrated safety monitoring solution for industrial scenarios facing composite gas risks. Against the backdrop of rapid development in the lithium battery industry and increasing industrial safety standards, deploying such comprehensive gas detection equipment is a key investment to achieve precise risk management and ensure the safety of personnel and assets.