RKI Instruments 03 Series single-gas monitors (GP-03 LEL, OX-03 O2, CO-03 CO, HS-03 H2S): pocket-size personal protection from combustible hydrocarbons, oxygen deficiency, hydrogen sulfide or carbon monoxide.
Models: CO - CO-03/ 0-500 ppm CO/ alligator clip/ alkaline batteries, H2S - HS-03/ 0-100 ppm H2S/ alligator clip/ alkaline batteries, O2 - OX-03/ 0-40% O2/ alligator clip/ alkaline batteries, LEL - GP-03/ 0-100% LEL/ alligator clip/ alkaline batteries.
Key benefits
- Operates 3,000 hours on alkaline (GP-03 up to 35 hours)
- Pocket size 2.1 x 2.6 x 0.9 in; 2.8 oz
- IP-67
- Data log from 5 to 300 hours
- Audible, visual and vibration alarms; automatic backlight
- Peak hold, STEL and TWA
- Intrinsically safe: ATEX and CSA
- Warranty: 3 years H2S and CO; 2 years LEL and O2
Specifications (manufacturer)
| Model Name | CO-03 | HS-03 | OX-03 | GP-03 |
| Gas Detected | Carbon Monoxide (CO) | Hydrogen Sulfide (H2S) | Oxygen (O2) | Combustible gas |
| Detection Principle | Electrochemical | Galvanic cell | Catalytic combustion | |
| Detection Range (Increments) |
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 Points | 1st 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 |
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| Alarm Methods |
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| Gas Sampling | Diffusion | |||
| Response Time | T90 in 30 seconds | T90 in 20 seconds (Alarms within 5 seconds when exposed to 12% O2) |
T90 in 30 seconds | |
| Accuracy 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 Options | Alkaline dry cell (2-AAA size) | Alkaline dry cell (2-AAA size) Ni-MH battery |
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| Continuous Operation | Alkaline dry cell: more than 3,000 hours (at 25°C, no backlight) |
Alkaline: 35 hrs Ni-MH: 30 hrs |
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| 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) |
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| Standard Accessories |
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| Optional Accessories |
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| Special Functions |
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| Warranty | 3 Year warranty | 2 Year warranty | ||
Product information supplied by the manufacturer (RKI Instruments).
Product codes
- CO - CO-03/ 0-500 ppm CO/ alligator clip/ alkaline batteries — SKU: 73-0060 — EAN: 2970102862203
- H2S - HS-03/ 0-100 ppm H2S/ alligator clip/ alkaline batteries — SKU: 73-0062 — EAN: 2970102862266
- O2 - OX-03/ 0-40% O2/ alligator clip/ alkaline batteries — SKU: 72-0010 — EAN: 2970102862209
- LEL - GP-03/ 0-100% LEL/ alligator clip/ alkaline batteries — SKU: 72-0037 — EAN: 2970102862204