Scope 1. Hazardous sites for explosive gas mixtures: Zones 1 and 2. Explosive gas mixture: IIA, IIB, IIC Grade 3. Temperature Group: T1-T6 technical parameter 1, temperature range: -20 ° C ~ + 50 ° C ~ 2, relative humidity: ≤95% non-condensation 3, atmospheric pressure: 80 ~ 110 kpa ~ 4, power supply voltage: DC24V; AC220V; AC127V. 5. Alarm working current: ≤600mA (DC24V)6, sound intensity: 100 ~ 115dB 7, protection grade: IP658, weight: 1.4 kg product characteristics 1. ZL102 aluminum alloy shell die-casting molding, high-voltage surface electrostatic spray; 2. The toughened glass cover, stainless steel exposed fasteners, protective mesh cover with galvanized surface spray plastic, double anti-corrosion; 3. The toughened glass cover has strong impact resistance, and has red, yellow, blue and other colors to choose from. 2. Do not damage the flameproof surface during installation and keep it clean. The fastening screw of flameproof surface should be tightened evenly, and the flameproof surface should not be mixed with foreign matter. 3, long-term use to regularly check whether the performance of the alarm is intact, such as failure or damage to the professional personnel to carry out maintenance.