• Measures carbon dioxide levels, temperature and humidity
• All three measurements shown simultaneously on the LCD display
• Records measurements on included SD card in Excel format with date and time stamp
• Easy data transfer to a PC for analysis
• Selectable data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds
• Measurement ranges: CO2 - 0 to 4,000ppm; Temperature - 32 to 122°F (0 to 50°C); Humidity - 10 to 90%RH

The Extech SD800 measures, displays, and stores carbon dioxide, temperature and relative humidity readings. Data is stored on a SD card for transfer to a PC. This meter is shipped fully tested and calibrated - with proper use, it will provide years of reliable service.

Data sampling rates are selectable between 5, 10, 30, 60, 120, 300 or 600 seconds.

1. Humidity/Temperature Sensor

2. Humidity Display

3. Temperature Display

4. CO2 Display

5. LOG (ENTER) button

6. SET button

7. AC adaptor socket

8. CO2 probe socket

9. ▲ (TIME) button

10. ▼ button

11. Reset button

12. RS-232 output

13. SD memory card socket

14. CO2 probe

15. CO2 plug

Note: Battery Compartment and Tilt Stand are located on the back of the meter.