*Please note that the CO2Meter offices will be closed starting at 5:00 pm et. October 8th to allow our team members time to prepare for the pending impact of Hurricane Milton. Orders placed after 2:00 pm et. October 8 will be held for shipment once our facilities reopen. All operations are expected to reopen October 14 at 8:30 am et.*

O2-A2 Alphasense 25% 2 Year Oxygen Smart EC Sensor

Alphasense 25% Oxygen Smart EC Sensor BOARD - CO2Meter
Regular price $70.00

POs or wholesale quantity discounts click here

The O2-A2 Alphasense Oxygen Sensor is designed to monitor 25% oxygen levels by volume. The sensor is most sought after as a replacement sensor for handheld gas detectors that use the O2-A2 sensor.

Features

  • Electrochemical Sensor measures up to 25% Oxygen
  • Barometric Pressure, Temperature and % Relative Humidity Sensors
  • Smart EC board Adds RS485 with Optional RS485 Cable
  • Easy Integration; Compact & Low Power

Models

  • O2-A2 Sensor Only – Sensor only.  Designed for integration into high-volume OEM products or as a replacement oxygen sensor in these 4 gas analyzers:
  • CM-32911 Development KitEasy to use, simply plug the board into your PC via the included serial UART to USB cable. 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 Smart EC BoardSame functionality as the development kit without USB cable or software.

Can be used as replacement sensors for:

  • BW Technologies GasAlert MicroClip XT
  • BW Technologies GasAlert Max XT-II
  • BW Technologies GasAlert Micro 5 PID
  • BW Technologies GasAlert Quattro
  • BW Technologies GasAlert Extreme GAXT-DL-2
  • BW Technologies GasAlert Extreme GAXT-DL-B-2
  • BW Equivalent part no. SR-X10-C1
  • MSA Solaris Orion Altair 4,5 (not 4X or 5X)
  • Fieldpiece SOX3
  • CityTech 4OX-2

Specifications

  • 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 until 85% original Output of 20.9% O2
  • Analog Output: 0-3VDC

Electrical/Mechanical

  • 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

Warranty

  • 90 days - See CO2Meter Terms and Conditions

Documents

Datasheet Data Sheet (pdf)

Documentation Manual (pdf)

Free Easy-to-use GasLab® Software

The Smart EC board 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

Accessories

Tube Cap Adapters easily convert 20mm standard gas sensors from diffusion to sampling sensors. Molded polymer. Tube cap adapters are not pre-installed. For accurate results you must mount the tube cap permanently.

RS485 Cable. Custom USB cable enables RS485 communication to GasLab Software for EC Sensor Board and Development Kit.

Micro-Pump Kit includes all the tools you need to utilize the tube-cap adapters as part of a sampling sensor system.

Nafion Tubing is a highly selective, semi-permeable membrane to water vapor. If gases inside Nafion tubing are wetter than gases surrounding the tubing, drying will occur. If the surrounding gases are wetter, humidification will occur.

Micro Gas Sampling Pumps provide a constant flow of air across the sensor with a tube cap - perfect for bench-top testing of sensors for closed-loop sampling applications.

Probe Enclosure for Development Kits gives a strong and secure container to mount the sensor. Hydrophobic filters available for enclosure for outdoor use.

  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

Based on 3 reviews
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J
Josef Salvamoser
CO2 and O2 sensor

best service, very good web site, very fast delivery and very uncomplicated order and payment

G
German Castro

Alphasense 25% Oxygen Smart EC Sensor

G
Gary Lamm

They had it in stock and sent it out on a Friday afternoon so I had it Monday

"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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