YEM-20, YEM-40, YEM-20L, YEM-40L, YEM-70L,YEM-70 , YEM-42YEM-40C & YEM-40CL

CO2 Temperature Humidity Monitor

YEM-42

- HD black bottom colr screen
- Use NDIR sensor 
- Lithium - electric direct charge ( optional )
- Dry battery power supply ( optional )
- Human Comfort index 
- Intelligent alarm
- CO2 user calibration 
- Screen brightness adjustable 
- Battery status indication