Where can I get explosion-proof certification for RFID positioning tags?

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RFID positioning tag products are being increasingly used in various explosive and hazardous environments such as chemical plants, oil fields, and coal mines. However, due to the special nature of the environments in which they are used, such positioning tags must meet the relevant testing requirements of the **GB3836 explosion-proof standard, which is what we refer to as explosion-proof certification. We know that explosion-proof equipment can adopt different types of explosion protection depending on factors such as its product structure, operating environment, and installation location. These include flameproof type, intrinsically safe type, encapsulated type, or composite types that combine two or more explosion protection methods. Due to their low power consumption, small size, and use in personnel positioning, RFID positioning tags can mostly adopt intrinsically safe explosion-proof designs. What are the technical requirements for intrinsically safe explosion-proof protection types? I. What are intrinsically safe electrical devices? Electrical explosion protection is achieved by limiting various parameters of the electrical equipment’s circuits, or by employing protective measures to restrict the energy and heat generated by spark discharges in those circuits. In this way, the electric sparks and thermal effects produced under normal operating conditions as well as in specified fault conditions cannot ignite any explosive mixtures present in the surrounding environment. Such electrical equipment has explosion-proof properties built into its circuits; it is safe by \"inherent\" design, which is why it is referred to as intrinsically safe. Electrical equipment that uses intrinsically safe circuits is called intrinsically safe electrical equipment. II. Explosion protection principle of intrinsically safe electrical equipment: The intrinsically safe type of explosion protection features circuits within the equipment that are such that any electric sparks or thermal effects generated under standard conditions (including normal operation and specified fault conditions) cannot ignite the specified explosive gas environment. Intrinsic safety is achieved by limiting the energy in the circuit; through proper control of circuit parameters, the potential spark energy is reduced to below the level necessary to ignite the specified gas mixture, and the surface temperature of wires and components is kept below the ignition temperature of that gas mixture. III. Interpretation of Intrinsic Safety Explosion-Proof Ratings
1. Electrical equipment rated “ia” is intrinsically safe electrical equipment that cannot cause ignition under normal operating conditions, as well as under one fault condition or any combination of two fault conditions ； In “ia”-type circuits, the operating current is limited to below 100 mA. “The “ia” type instrument is suitable for Zones 0, 1, and 2. 2. Electrical equipment of the “ib” category is intrinsically safe electrical equipment that cannot cause ignition under normal operation or when a fault condition occurs. In the “ib” type circuit, the operating current is limited to below 150mA. “The “ib” type instrument is suitable for Zones 1 and 2. 3. Electrical equipment of “ic” category does not take fault conditions into account and is suitable for Zone 2. IV. Main measures for intrinsically safe explosion protection: 1. Voltage and current limitation of the circuit ； 2. Capacitance and inductance limitations in circuits ； 3. Isolation between intrinsically safe circuits and non-intrinsically safe circuits ； 4. Requirements for reliable components and assemblies ； 5. Regulations on safety barriers ； 6. Fault analysis and test regulations, etc. V. Standards applicable to intrinsically safe electrical equipment: 1. GB3836.4-2010 Electrical equipment for explosive gas atmospheres – Part 4: Equipment protected by intrinsic safety “i”. 2. IEC60079-11:1999 Electrical equipment for explosive gas atmospheres – Part 11: Equipment protected by intrinsic safety “i”. VI. Characteristics and application scope of intrinsically safe electrical equipment: Since the circuits of intrinsically safe electrical equipment are inherently safe, any sparks, arcs, or thermal energy generated will not ignite the explosive mixtures present in the surrounding environment. Therefore, intrinsically safe electrical equipment does not require a special explosion-proof enclosure. This allows for a reduction in the size and weight of the equipment, as well as simplification of its structure. At the same time, the transmission lines for intrinsically safe electrical equipment can be made of insulated wires or bare wires, which helps to save a large amount of cable. Therefore, intrinsically safe electrical equipment features safety and reliability, simple structure, small size, light weight, low cost, and ease of manufacturing and maintenance, making it an ideal type of explosion-proof electrical equipment. However, since the maximum output power of intrinsically safe electrical equipment is around 25W, its range of application is limited. Currently, intrinsically safe electrical equipment is mainly used in communication, monitoring, signal and control systems, as well as in instruments and meters. The application of intrinsically safe RFID positioning tags is a typical example. https://p1-tt.byteimg.com/origin/pgc-image/bcade127a5cc438393e6f5411763e947?from=pc Table 1: Schematic diagram of intrinsically safe circuits https://p3-tt.byteimg.com/origin/pgc-image/8494abac7d644c7b86f93c68e93ab05c?from=pc Table 2: Intrinsically safe components —— Zener safety barriers https://p3-tt.byteimg.com/origin/pgc-image/e648244058664fd5b40ae7d36e629dec?from=pc Table 3: Block diagram of intrinsically safe systems