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OX-03 Personal Oxygen Monitor & Alarm

RKI Instruments

Regular price $280.00

Unit price per 

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SKU: 72-0010


OX-03 Personal Oxygen Monitor & Alarm

The OX-03 is a personal single gas monitors designed for protection from exposure to oxygen deficiency.


  • Operates 3,000 hours on alkaline
  • Pocket size 2.1” x 2.6” x 0.9”
  • Lightweight, 2.8 ounces
  • IP-67 waterproof rating
  • Data log from 5 to 300 hours
  • Audible / visual / vibration alarms
  • Automatic backlight
  • Peak Hold, STEL & TWA
  • Intrinsically safe, ATEX & CSA
  • 2 Year warranty

Calibration Instruction Video


Model Name

Gas Detected Oxygen (O2)
Detection Principle Galvanic cell
Detection Range
0 – 40%vol.
(0.1% vol.)
Alarm Set Points Low 19.5% vol.
High 23.5% vol.
Over 40.0% vol.
Alarm Types
  • Gas alarms: 1st and 2nd (user adjustable), OVER alarm, STEL and TWA
  • Trouble alarms: Sensor connection, low battery circuit failure, and calibration range error
Alarm Methods
  • Gas alarm: Flashing LED’s, intermittent buzzer, flashing gas value, and vibration
  • Trouble alarm: Flashing LED’s, intermittent buzzer, and display of error message
  • STEL & TWA alarms: Flashing LED’s, intermittent buzzer, flashing gas value, and vibration
Gas Sampling Diffusion
Response Time T90 in 20 seconds
(Alarms within
5 seconds when exposed to 12% O2)
which ever is greater
±0.5% O2
Power Options Alkaline dry cell (2-AAA size)
Continuous Operation Alkaline dry cell: more than 3,000 hours
(at 25°C, no backlight)
Safety Rating ATEX/IECEx approved. CSA classified, “C/US”, as intrinsically safe, Class I, Division 1, Groups A, B, C, D
Dimensions & Weight 2.1” W x 2.64” H x 0.94” D, (54 x 67 x 24 mm); 2.8 ounces (80 g)
Display Digital LCD, gas name & concentration, auto backlighting during alarm, operation icon, battery icon
Operating Temp. & Humidity -4°F ~ 122°F (-20°C ~ 50°C);
Humidity below 90% RH (non-condensing)
Standard Accessories
  • Rubber protective boot
  • Alligator clip
  • Data logging software
  • Alkaline batteries
Optional Accessories
  • Calibration adapter
  • Charger unit
  • Calibration kit
  • Belt clip
  • Data logging download cable
  • Wrist strap
Special Functions
  • Manual backlight for LCD (automatically lit during alarm)
  • Peak hold, STEL & TWA
Warranty 2 Year warranty



Mfr. No. 72-0010 OX-03, 0-40 % O2 with alligator clip and alkaline batteries
Mfr. No. 72-0010-56 Kit including an OX-03 with alkaline batteries, screwdriver, case, and calibration kit (34L cyl 100% N2, regulator, cal cup & tubing)
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