... DCS(Distributed Control System) * Flameproof body design acc. to IEC61508,simple and easy installation and maintenance. * Multi- ... parameter backlight LCD display: measuring range,digital gas reading ,units, bar graph , system status etc.* International ... , %,%LEL,%VOL* Operating temperature: -40~70°C (According to gas sensor operating conditions)* Humidity: 10-95%RH (non condensing)* ...