RKI Portable Single-Gas Monitor, 03 Series

RKI Portable Single-Gas Monitor, 03 Series

Pine Item #56070
The 03 Series single gas monitors are designed for LEL, O2, H2S, or CO detection. Individuals need personal protection in hazardous areas at all times without adding extra bulky equipment, and the 03 Series can provide that kind of protection at an affordable price. The GP-03, OX-03, CO-03, and HS-03 models are personal single-gas monitors designed for protection from exposure to combustible hydrocarbons, oxygen deficiency, hydrogen sulfide, or carbon monoxide.

Available for LEL, O2, H2S, or CO

Operates 3,000 hours on alkaline (GP-03 up to 35 hours)

Pocket size 2.1” x 2.6” x 0.9”

Lightweight, 2.8 ounces


Data log from 5 to 300 hours

Audible / visual / vibration alarms

Automatic backlight

Peak Hold, STEL & TWA

Intrinsically safe, ATEX & CSA

3 Year warranty H2S & CO

2 Year warranty LEL & O2


Hazardous Material



Refineries / Petrochemical

Water / Wastewater Treatment



Chemical Plants

Fire Services

Quantity must be 1 or more
Email for Quote


Technical Specifications

Model NameCO-03HS-03OX-03GP-03
Gas DetectedCarbon Monoxide (CO)Hydrogen Sulfide (H2S)Oxygen (O2)Combustible gas
Detection PrincipleElectrochemicalGalvanic cellCatalytic combustion
Detection Range
0 – 500 ppm
(1 ppm)
0 – 100 ppm
(0.5 ppm)
0 – 40%vol.
(0.1% vol.)
0 – 100% LEL
(1% LEL increments)
Alarm Set Points1st 25 ppm
2nd 50 ppm
TWA 25 ppm
STEL 200 ppm
Over 500 ppm
1st 5.0 ppm
2nd 30.0 ppm
TWA 1.0 ppm
STEL 5.0 ppm
Over 100.0 ppm
Low 19.5% vol.
High 23.5% vol.
Over 40.0% vol.
1st 10% LEL
2nd 50% LEL
Over 100% LEL
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 SamplingDiffusion
Response TimeT90 in 30 secondsT90 in 20 seconds
(Alarms within
5 seconds when exposed to 12% O2)
T90 in 30 seconds
which ever is greater
± 5% of reading or ± 5 ppm CO± 5% of reading or ± 2 ppm H2S±0.5% O2± 5 of reading or
± 2% LEL
Power OptionsAlkaline dry cell (2-AAA size)Alkaline dry cell (2-AAA size)
Ni-MH battery
Continuous OperationAlkaline dry cell: more than 3,000 hours
(at 25°C, no backlight)
Alkaline: 35 hrs
Ni-MH: 30 hrs
Safety RatingATEX/IECEx approved. CSA classified, “C/US”, as intrinsically safe, Class I, Division 1, Groups A, B, C, D
Dimensions & Weight2.1” W x 2.64” H x 0.94” D, (54 x 67 x 24 mm); 2.8 ounces (80 g)
DisplayDigital 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)
Manuals & Data Sheets