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EasyLog | EL-USB-CO300

Carbon Monoxide Data Logger with USB
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This standalone data logger measures and stores up to 32,510 Carbon Monoxide (CO) readings over a 0 to 300ppm measurement range and -10 to +40°C (14 to +104°F) operating temperature range. Easily set up the logger and view downloaded data by plugging the unit into a PC’s USB port and using the free EasyLog software provided.  Data can then be graphed, printed and exported to other applications for detailed analysis. Supplied with ½ AA battery and wall mount clip.  

Please note.  The sensor life on a EL-USB-CO300 logger is typically 4 years. You can find the exact expiry date in the EasyLog software under Current Status.  

IMPORTANT SAFETY WARNING EL-USB-CO300 is a professional instrument that is designed to measure and record levels of Carbon Monoxide (CO) in air over a period of time. It takes a sample reading at set intervals for recording / monitoring / analysis purposes. It is not a suitable substitute for a domestic or industrial Carbon Monoxide detector/alarm.

PLEASE NOTE: You can add up to TWO SPARE BATTERIES for every data logger ordered.  If you wish to order more than this quantity, please contact your local sales office for special shipping information.


Measurement Range
0 to 300ppm CO
±5ppm CO
Logging Rate
User selectable between 10 seconds and 5 mins
Battery Life
3 Months



Why do the LEDs flash after connecting my logger to a PC?

Why aren't my batteries working?

More support


The EL-USB-CO300 is suitable for a wide variety of applications. These include:

For application stories on our data loggers, visit our case studies section.



BAT 3V6 1/2AA
BAT 3V6 1/2AA Battery

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stores up to 32,510 Carbon Monoxide (CO) readings

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