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Extech SD800 Carbon Dioxide (CO2), Humidity and Temperature Data Logger with SD Card Slot

CO2 Humidity and Temperature Data Logger

Extech Logger Measuring Carbon Dioxide, Temp and RH with SD Card

Part Number: SD800

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  • Carbon Dioxide, Temperature and Humidity Measured and Recorded onto SD Card

  • 0 to 4,000 ppm (CO2), 0°C to 50°C (Temperature) and 10 to 90% (Humidity) Measurement Range
  • Stores up to 2 Million Readings Directly onto 2GB SD Card (No Software to Install)
  • Sampling Rate of 5 Seconds to 10 Minutes
  • LCD Display Shows Current Carbon Dioxide (CO2), Temperature and Humidity Readings

Note: The AAA Batteries is NOT Designed to Operate the Data Logger, It is Designed to Support the Memory (Data Storage) in the Event of a Power Failure.

Includes 2GB SD Card, Mounting Bracket, (6) AAA Batteries and Universal AC Adapter


All Calibration Orders Have a 5 to 7 Business Day Lead Time
1 Year Calibration Due Date Unless Otherwise Specified


Extech SD800 Carbon Dioxide, Humidity and Temperature Data Logger Specifications

Carbon Dioxide Range: 0 to 4,000 ppm
Resolution: 1 ppm
Accuracy: ±40ppm (<1000ppm); ±5% of Rdg (>1000ppm)
Response Time: <2 min to 63% of Final Reading Typical
Humidity Range: 10 to 90% RH
Resolution: 0.1% RH
Accuracy: ±4% RH
Temperature Range: 0°C to 50°C (32°F to 122°F)
Resolution: 0.1°C/F
Accuracy: ±0.8°C (±1.8°F)
Compensation: Automatic
Sampling Rate User Selectable
5, 10 and 30 Seconds
1, 2, 5 and 10 Minutes or Auto
Data Storage
2,000,000 Data Points on 2G SD Card
Display Type: LCD
Size: 60mm x 50mm (2.4" x 2.0")
Update Rate: Approx. 1 Second
Operating Environment Temperature: 0°C to 50°C
Humidity: 0 to 90% RH
Sensors Temperature: Internal
Humidity: Precision Capacitance Type
Carbon Dioxide: Non-Dispersive Infrared (NDIR) Sensor
Power Source AC Adapter and (6) AAA Battery for Backup
Note: The Batteries are Designed for only Backup. The Data Logger has Limited Functionality without AC Power.
Memory Card SD Memory Card 1 GB to 16GB Compatible
Battery Life Approx. 1 Month
(Dependant on Environment and Sampling Rate)
Data Output MS Excel compatible file on SD Card
Standards Compliance CE
Weight Meter: 8.2 oz. (240 grams)
Probe: 5.4 oz. (158 grams)
Dimensions Meter: 132mm x 80mm x 32mm (5.2" x 3.1" x 1.3")
Probe: 132mm x 38mm x 32mm (5.2" x 1.5" x 1.3")

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