Analytical Industries Nitrox Analysers for Welding

 Analytical Industries’ AII-3000 series or Palm O2 are a convenient way to check oxygen levels in welding gases. These cost effective gas analyzers also measure and display the concentration of oxygen in compressed breathing air tanks intended for scuba diving, for personnel safety, O2 deficiency in confined spaces, as well as confirming the O2 levels prior to welding. These monitors use similar electrochemical galvanic fuel cell oxygen sensor that are extensively used to measure concentrations from 0% to 100% O2 in gas streams.


With four format options, these handhelds give user the flexibility to match the instrument to their needs with four combinations of alarms, no alarms, internal and external sensors. 2 AA batteries give up to 50 days of use.
  • AII-3000-A – External sensor, no alarm
  • AII-3000-AHC – Internal sensor, no alarm
  • AII-3000-M – External sensor, alarm
  • AII-3000-MHC – Internal sensor, alarm

Palm O2 and Palm CO

With only two buttons, and one-touch calibration, they are very simple to use. This is the ideal cost-effective choice to check for O2 or CO in your scuba tanks. Palm O2 is available with internal or external sensor and offers excellent battery life of up to 18 months of use.



  • 0-100% O2 measurement range
  • Long sensor life up to 60 months (AII-3000)
  • Battery life up to 13,000 hours of continuous use (Palm O2)
  • Integrated or remote sensors
  • Fast response time of T90 in <10 seconds


  • Weld purge gas quality
  • Personnel safety protection
  • Checking concentrations of oxygen in scuba tanks or nitrox mixtures
  • Checking for carbon monoxide in scuba tanks


AII-3000Palm O2Palm CO Analyzer
Measurement range0-100% oxygen0-25 ppm CO
Accuracy< ±2% of FS range under constant conditions< ±2 ppm under constant conditions
Response timeT90 < 10 secondsT90 < 30 seconds
Sensitivity (LDL)0.50%0.5 ppm CO
Linearity±1% under constant conditions
Sensor modelAII-11-60 (remote sensor)
AII-11-75-PO2-D (for diving)
Sensor life at 25°C (77°F) and 1 atmosphere60 months in air 5°C (77°F) and 1 atmosphere32 months in air 5°C (77°F) and 1 atmosphere24 months in air 5°C (77°F) at 1 atmosphere
Calibration intervalPrior to use and after 8 hours operationCertified span gas mixture of CO concentrations between 10-20 ppm with balance air.
Inlet pressureAmbient or 0.34-2 barg (5-30 psig) for flow through connector800 1200 mbara (11.6-17.4 psig)
Flow rate (constant)0.2-10 Nl/min (0.4-20 SCFH)
Gas connections1x16 mm thread
1/4" tube for remote sensors
See accessories for additional connectors
Supplied with Dome adapter (A-3388) with optional BC adapter (A-3671)
Display3½ digit backlit LCD 7 x 3.5cm (2.75 x 1.375"); resolution 0.13 digit LCD 2.8 x 1.6cm (1.1 x 0.625"); resolution 0.12 digit LCD 2.8 x 1.6cm (1.1 x 0.625"); resolution 1 ppm CO
Dimensions9.1 x 14.9 x 4cm (3.6 x 5.9 x 1.6")6.9 x 10.4 x 3.4cm (2.72" x 4.1" x 1.35")
Weight280g (10oz)196g (7oz)
CompensationTemperature compensatedNA
AlarmsUser adjustable HI and LO alarms (AII-3000 M and MHC only)
Storage temperature-20°C to +60°C (-4°F to 140°F) on intermittent basis3°C to 35°C (37.4°F to 95°F)
Operating temperature5 to 45°C (41°F to 113°F)0°C to 50°C (32°F to 122°F)
Power2 AA alkaline batteries
Battery LifeUp to 1200 hrsUp to 1300 hrsUp to 450 hrs of continual use
HumidityNon-condensing 0-95% RH
Warm up timeNone60 Seconds
ApprovalsISO 9001:2000, MDD 93/42/Annex II, ISO 13485:2003None

Download Datasheet : Analytical Industries Nitrox Analysers for Welding

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