RKI Instruments 03 Series O2 Single Gas Monitor 72-0010

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RKI's O2, CO, and H2S version Gas Monitors can be operated continuously for at least 3,000 hours on (2) AAA size alkaline batteries. The GP-03 operates for 35 hours on alkaline and 30 hours on rechargeable Ni-MH. The 03 models have 2 preset alarms that are user adjustable. Each version is also equipped with visual, audible, and vibration alarms as standard. The RKI 03 Series Monitors are great in areas of hazardous material, mining, tunnels, refineries or petrochemical, water and wastewater treatment, pharmaceuticals, utilities, chemical plants and fire services.

Applications: Hazardous material, Mining, Refineries/petrochemical, Water/wastewater treatment, Pharmaceuticals, Utilities, Chemical plants, Fire services

Key Features:

  • Operates 3,000 hours on alkaline batteries (GP-03 operates 35 or 30 hrs on alkaline/Ni-MH)
  • Pocket size 2.1 in. (W) x 2.6 in. (H) x 0.9 in. (D)
  • Lightweight (2.8 oz.)
  • Impact, dust, and water resistant (IP-67)
  • Replaceable rubber boot
  • Data log from 5 to 300 hours with adjustable intervals
  • Audible / visual / vibration alarms
  • Automatic backlight
  • Low battery alarm


  • Oxygen (O2)
  • Detection principle: Galvanic cell
  • Detection range: 0 ‰ÛÒ 40 percent volume
  • Alarm set points: Low - 19.5 percent volume High - 23.5 percent volume Over - 40.0 percent volume
  • 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
  • Gas sampling: Diffusion
  • Response time: T90 in 20 seconds (Alarms within 5 seconds when exposed to 12 percent O2)
  • Accuracy: å± 5 percent O2
  • Data logging: 10 second intervals = 5 hours, 5 minute intervals = 150 hours, 10 minute intervals = 300 hours Instrument records alarms, alarm trends, gas readings, calibration & bump test history, instrument information and settings
  • Continuous operation: Alkaline dry cell: more than 3,000 hours (at 25 degrees C, no backlight)
  • Safety rating: ATEX/IECEx approved. CSA classified, ‰ÛÏC/US‰Û, as intrinsically safe, Class I, Division 1, Groups A, B, C, D (pending)
  • Enclosure: Dust and water resistant with IP-67 rating
  • Display: Digital LCD, gas name & concentration, auto backlighting during alarm, operation icon, battery icon
  • 2 year warranty

Monitor Includes:

  • Rubber protective boot
  • Alkaline batteries
  • Alligator clip
  • Wrist strap
  • Data log software

Part Numbers:
72-0010 - Monitor only
72-0010-05 - O2-03 Monitor with alligator clip, alkaline batteries and calibration cup
72-0010-50 - Accessory CS Kit - O2-03 Monitor with alkaline batteries, screwdriver, and small padded case
72-0010-56 OX-03 - Gas Monitor Accessory Kit (alkaline batteries, screwdriver, case) and Calibration Kit (gas, regulator, calibration cup and tubing)

Additional Details:

0.70 LBS
8.50 (in)
1.00 (in)
12.00 (in)
Calculated at Checkout
Gas Type:
Oxygen (O2)

1 Review

  • 5
    RKI Instruments O2 Gas Monitor

    Posted by Jimmy on May 11th 2016

    Great, that is powerfully helpful!