Description
The RKI OX-04 Oxygen (O₂) Single Gas Monitor is a compact, rugged personal gas detector designed for continuous oxygen monitoring in industrial and hazardous environments. Its small size and simple operation make it ideal for workers who need dependable personal oxygen monitoring without the size and complexity of a multi-gas instrument.
The OX-04 uses a field-replaceable oxygen sensor and provides a clear, easy-to-read gas concentration display. Audible, visual, and vibration alarms alert the user when oxygen concentrations reach configured alarm levels.
Built for demanding work environments, the OX-04 features an IP67 impact-, dust-, and water-resistant enclosure, automatic alarm backlighting, datalogging capability, and a rotating alligator clip for convenient personal wear.
The instrument is powered by two AAA batteries and includes alkaline batteries and an alligator clip.
RKI Part Number: 72-0018
- Dedicated personal oxygen (O₂) monitor
- 0–40% Vol. oxygen detection range
- 0.1% Vol. reading increments
- Diffusion sampling
- Field-replaceable oxygen sensor
- Audible, visual, and vibration alarms
- User-adjustable alarm settings
- Automatic LCD backlight during alarm conditions
- Peak-hold function
- Built-in datalogging capability
- IP67 impact-, dust-, and water-resistant enclosure
- Replaceable protective rubber boot
- 360° rotating alligator clip
- Powered by two AAA batteries
- Intrinsically safe hazardous-location approvals
Typical Applications
- Confined-space work
- Water and wastewater treatment
- Utilities
- Chemical and petrochemical facilities
- Industrial maintenance
- Hazardous materials response
- Fire and emergency services
- Personal oxygen monitoring
| Model | RKI OX-04 |
| RKI Part Number | 72-0018 |
| Gas Detected | Oxygen (O₂) |
| Detection Range | 0–40% Vol. |
| Reading Increment | 0.1% Vol. |
| Accuracy | ±0.5% O₂ |
| Factory Alarm Set Points | A1: 19.5% Vol. A2: 18.0% Vol. A3: 23.5% Vol. |
| Sampling Method | Diffusion |
| Power | 2 AAA alkaline batteries |
| Continuous Operation | Up to 3,000 hours with alkaline batteries |
| Operating Temperature | -4°F to 122°F (-20°C to 50°C) |
| Humidity | 0–90% RH, non-condensing |
| Dimensions | Approx. 2.1 in W × 2.64 in H × 0.94 in D |
| Ingress Protection | IP67 |
| Alarms | Audible, visual, vibration and LCD indication |
| Safety Approvals | ATEX / IECEx; QPS C/US intrinsically safe, Class I, Division 1, Groups A, B, C & D |
| Warranty | 3 years |
| Included | OX-04 monitor, alkaline batteries and alligator clip |
Specifications are subject to manufacturer updates. Refer to the RKI OX-04 Operator's Manual for complete operating, calibration, safety and maintenance requirements.
Product Literature
Operator's Manual
Need help with the RKI OX-04, calibration gas, or selecting the correct gas detector? Call CPS Calibrations at 865-900-8844 or email info@cpscalibrations.com.
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