Product introduction: Bus signal transmission (S1, S2, GND, +24V); Switching real-time concentration display or time display for monitoring combustible gases and vapors; Automatic calibration, automatic tracking of sensor aging status; Anti-rfi /EMI interference; Two-level alarm: low limit alarm, high limit alarm, alarm setting value is adjustable) When processing received signals, the alarm signal is better than the fault signal; Automatic fault monitoring, can accurately indicate the fault location and type; 2 sets of programmable internal linkage output modules and 2 programmable emergency buttons, which can automatically or manually control external devices; It has a powerful memory function of 999 alarm information, 100 fault information and 100 switch information historical data record, and the information is not lost after power failure; RS485 bus communication interface, can be configured with any equipment with standard MODBUS protocol, forming a larger gas network management system: simple and convenient operation, only one click to complete all the configuration of the system; Beautiful appearance, small size, easy to install.