- Maxi. 4 gas detectors - MPU teconology - Bright LCD display - rs485 communication - For industrial usage Features: 1. Advanced MPU technology2. Max. capacity of system: 4 channels3. Work in patrol type4. Four BUS signal outputs:PositiveTerminal,NegativeTerminal,Communication Line LA, Communication Line LB5. Real-time concentration dislay circularly6. Bright LCD display, touch pad keyboard7. ...