Usable in explosion hazardous area with flame proof structure Easy installation with a wall mount type Gas concentration display with 4-digit & Bar-graph (32 segment, 3-color LED) 3-color display according to alarm stages (Green, Yellow, Red) 3-stage alarm, 1-trouble LED display and relay contact output Easy configuration of monitoring system with RS-485 Modbus isolated serial data communication(Option) Programmable alarm setting (Level, Time delay) Peak hold Self diagnosis