O2 Single Gas Detector

ARA O2 single gas detector is a cost effective personal detector with 24 months of continuous operation. This wearable oxygen detector has one button, making it simple to use. ARA O2 alerts workers when oxygen health levels exceed set safety levels.

Typical applications for ARA O2 single gas detector includes:

  • Site wide safety
  • Confined space entry
  • Plant shutdown processes
  • First response safety

qps_ certificationIECEx certificationATEX certfication

Enquire Now


ARA O2 gas detector has a self test feature that tests the audio, visual and vibrate alarms to give you confidence before use!

The ARA IR link* allows you to download 30 recent event logs and configure setting including:

  • User ID
  • Low / High oxygen alarms
  • Self test intervals
  • Bump test intervals

Ultimate Performance

  • 24 months of continuous operation
  • Live oxygen readings
  • Event logging download

Ultimate Safety

  • Instantaneous oxygen alarms
  • Adjustable high/low O2 alarms
  • Calibration and bump test reminders

Ultimate Flexibility

  • Lifetime remaining countdown helps users to plan for future projects and site shutdowns
  • Displayed data option (live reading or lifetime remaining)

Technical Specification

IECEx certificationATEX certfication

Sensor Type Single plug-in electrochemical cell
Detection Range H2S: 0 to 100 ppm
CO: 0 to 300 ppm
SO2: 0 to 50 ppm
O2: 0 to 25 %
Event Log Storage Last 30 events
Battery 3.6 Vdc, 1.65 Ah, lithium battery
Battery Life Standard models: 24 months of operations (2 mins alarms per day)
Hibernation models: 36 months of operation (2 mins per day and using sleep function)
User Options User ID
Low Alarm
High Alarm
Displayed Data (live reading or lifetime remaining)
Bump-Test Interval
Calibration Interval
Self-test Interval
Alarms Audio Alarm: (95 dB @ 10 cm)
Visual Alarm: LED
Vibrating Alarm: Vibrator (operates at ± 10 °C)
Temperature H2S, CO, SO2: – 40 to 60 °C
O2: – 30 to 60 °C
Humidity: 5 – 95 % RH
Ingress Protection IP67
Display Liquid Crystal Display (LCD)
Weight and Dimensions 92 g (3.2 oz)
87 x 50 x 29 mm (3.4 x 2.0 . 1.1 inch)

* All specifications quoted are at calibration point and under the same ambient conditions.
*Model dependant.

Download Brochure


The ARA DOCK4 is a bump test and calibration station that can test up to 4 ARA Single Gas Detectors simultaneously reducing gas usage and testing time. The ARA DOCK4 is simple to operate and records calibration and bump test reading along with the serial number, date and time.

To find out more about the ARA DOCK4 available from ION Science, including the O2 Single Gas Detector, please fill out the form HERE.

*ARA DOCK4 is sold separately

ARA DOCK4 Manual
ARA DOCK4 Calibration dock

Video Library


Find out more about the ARA DOCK4 Bump Test and Calibration Station.

What’s in the box?

Find out more about ARA gas detector, its functionality and models for H2S, CO, SO2 and O2 gas detection.

Find out more about ARA Single Gas Detector Range!

Find out more about ARA gas detector, its functionality and models for H2S, CO, SO2 and O2 gas detection.


For further supporting documentation for ARA O2 single gas detector, please see below.

O2 Single Gas Detector – Accessories and Replacement Parts

For further supporting documentation, please see below.

ARA O2 Single Gas Detector Enquiry Form

Please complete the form below and a member of our team will contact you shortly.

Global Distributors

All ION Science distributors are trained to the highest standards to provide you with access to our product portfolio locally, along with the best possible service and support. Find your local representative.