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Alphasense 25% Oxygen Smart EC Sensor

Alphasense 25% Oxygen Smart EC Sensor
Regular price

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The Alphasense oxygen sensor is designed to provide engineers, scientists and students an accurate and reliable way to measure up to 25% oxygen levels by volume. The circuit board's microprocessor provides zero and span calibration as well as barometric pressure, temperature and % relative humidity sensors. Features on-board memory to log data when used in a remote device.


  • Electrochemical (EC) Sensor Measures up to 25% Oxygen
  • Circuit Board includes Barometric Pressure, Temperature and % Relative Humidity Sensors
  • Circuit Board adds RS485 Industry-standard Interface
  • Easy Integration; Compact & Low Power


CM-32911 Development KitEasy to use, simply plug the board into your PC via USB. Use our free GasLab® software to measure and graph oxygen levels, barometric pressure, temperature, and % relative humidity. Includes on-board memory for data logging.

CM-32910 Circuit BoardSame functionality as the development kit without USB cable or software.

AP-0001 Sensor Only – raw sensor only.  Designed for integration into high-volume OEM products.


  • Measurement Range: 0-20.9% oxygen
  • Output: 80-120 uA @ 20.9% O2
  • Response Time: < 15 sec. t90 (s) from 20.9% to 0% O2
  • Linearity: 0.6% O2 deviation @ 10% O2
  • Output drift: < 1% change @ 3 months
  • Operating life: > 24 months unti 85% original Output of 20.9% O2
  • Digital Output: RS485
  • Analog Output: Available

PCB Onboard Functionality

  • Temperature sensor
  • %RH sensor
  • Barometric sensor
  • 64K memory for time-stamped data logging of all measurements  


  • Dimensions (sensor): 17.4mm x 20.3mm
  • Dimensions (sensor + PCB): 40mm X 25mm x 29mm (LxWxH)
  • Power Input: 3.3-5.5 VDC
  • Current Consumption: 10ma peak, < 3mW average


  • 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

System Requirements

  • Windows XP SP2 or newer
  • Microsoft .Net 3.5 Runtime Libraries

Customer Reviews

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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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