K33 ELG 10,000ppm CO2 + RH/T Data Logging Sensor | CO2Meter.com
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K33 ELG 10,000ppm CO2 + RH/T Data Logging Sensor

K33 ELG 10,000ppm CO2 + RH/T Data Logging Sensor
Regular price $329.00

POs or wholesale quantity discounts click here

The K33 ELG (environmental logger) is designed to log up to 10,000ppm (1%) carbon dioxide, temperature, and % relative humidity in ambient air. Because of its ultra-low power requirements, it can “wake up”, take a sample, store the data in memory, and go back to sleep. Using battery power only, the sensor can be placed in the field for days or even weeks at a time.


  • Measures up to 10,000ppm CO2, Temperature, %RH
  • Built-in Memory for Data Logging
  • Multiple Industry standard I/O options


CM-0026 K33 ELG 1% CO2 Sensor Development Kit - Easy to use, simply plug the sensor module into your PC via USB. Use it for evaluation, rapid application development or for experiments. The Devkit includes a K33 ELG sensor with pre-soldered connectors that provide power and connectivity. UART to USB Bridge cable, universal power supply and AA battery pack included. Uses our free GasLab® software to measure and graph carbon dioxide, to configure the sensor or for data logging.

SE-0020 K33 ELG 1% CO2 Sensor Only - for integration into high-volume OEM products. Contact us directly for wholesale pricing on large quantities of this sensor.


  • CO2 Measurement: non-dispersive infrared (NDIR)
  • Measurement Range: 0 – 10,000 ppm
  • Rate of Measurement: every 2 seconds
  • Response time: 30 seconds
  • Warm up time:  < 1 min. (@ full specs < 15 min)
  • CO2 Accuracy: ± 30ppm ± 3% of measured value
  • Temperature Range: -40 to 60C
  • Temperature Accuracy: ± 0.4C at 25C
  • Relative Humidity Range: 0-100% RH non condensing
  • Relative Humidity Accuracy: ± 3% RH
  • Measurement Method: diffusion
  • Available Output: Analog
  • Communication options: UART and I2C
  • Data logging: 30 seconds to 18 hours sample interval for CO2, RH & T
  • Optional: Support for real-time measurement with software
  • Memory: 5,400 log entries maximum, includes timestamp, co2, temp, RH. 1 additional analog input to the log available
  • Sensor Life Expectancy: > 15 years
  • Maintenance Interval: no maintenance required

Electrical / Mechanical

  • Power Input: 6-14 VDC max rating, stabilized to within 10%
  • Max Current: 250 mA
  • Dimensions: 2.0 × 2.25 × 0.5 inches
  • Current Consumption: 40 mA average

Development Kit

  • 6’ (1.8m) USB -UART bridge cable (non-standard)
  • 6VDC universal wall power supply with connector for sensor 120/240 VAC 50/60 Hz
  • 4x AA battery pack w/ connector for sensor 


  • 90 days - See CO2Meter Terms and Conditions. 

Free Easy-to-use GasLab™ Software

This device uses GasLab® software for setup, calibration, data logging, and real-time data analysis. GasLab® makes it easy to export data into a .CSV file that can be imported into any industry-standard software or spreadsheet. GasLab® runs on Windows XP or higher, and free to use with our products.

Download Latest Software Here



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"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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