CO gives early warning for mills and silos

Millwatch, what’s inside the box? Key: 1 power switch & fuse; 2 display; 3 electronics panel; 4 sample line connection; 5 compressed air inlet; 6 cooler unit; 7 catch pot; 8 peristaltic pump; 9 condensate drain; 10 11 12 blank; 13 calibration gas, CO (mid); 14 calibration gas – CO (high); 15 calibration gas, air; 16 calibration gas flowmeter and valve; 17 calibration gas to probe; 18 blowback unit; 19 oxygen sensor (where fitted); 20 carbon monoxide sensor 1; 21 sample pump 1; 22 sample pump 2; 23 solenoid valves; 24 menu operation keys