RKI Instruments
RKI CX-04 Carbon Monoxide (CO) + Oxygen (O₂) Dual Gas Monitor
- SKU:
- 73-0069
Description
The RKI CX-04 Carbon Monoxide (CO) + Oxygen (O₂) Dual Gas Monitor is a compact personal gas detector designed to simultaneously monitor carbon monoxide and oxygen with a single instrument. The CX-04 provides workers with continuous protection from elevated CO concentrations as well as oxygen-deficient or oxygen-enriched atmospheres.
The CX-04 monitors carbon monoxide from 0–2,000 ppm and oxygen from 0–25% Vol. A clear, easy-to-read display provides real-time gas readings, while audible, visual, and vibration alarms alert the user when gas concentrations reach configured alarm levels.
Built for demanding industrial environments, the CX-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 alkaline batteries and includes alkaline batteries and an alligator clip.
RKI Part Number: 73-0069
- Simultaneous carbon monoxide (CO) and oxygen (O₂) monitoring
- CO detection range: 0–2,000 ppm
- O₂ detection range: 0–25% Vol.
- Dual-gas protection in one compact personal monitor
- Diffusion sampling
- Field-replaceable 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 alkaline batteries
- Intrinsically safe hazardous-location approvals
Typical Applications
- Confined-space entry
- Industrial facilities
- Water and wastewater treatment
- Utilities
- Refineries and petrochemical facilities
- Chemical processing facilities
- Industrial maintenance
- Hazardous materials response
- Fire and emergency services
- Personal CO and oxygen monitoring
| Model | RKI CX-04 |
| RKI Part Number | 73-0069 |
| Gases Detected | Carbon Monoxide (CO) + Oxygen (O₂) |
| CO Detection Range | 0–2,000 ppm |
| O₂ Detection Range | 0–25% Vol. |
| Sampling Method | Diffusion |
| Sensor | Combination carbon monoxide and oxygen sensor |
| Response Time | T90 within 30 seconds |
| Power | 2 AAA 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 |
| Datalogging | Built-in datalogging capability |
| Ingress Protection | IP67 |
| Safety Approvals | ATEX / IECEx; QPS C/US intrinsically safe, Class I, Division 1, Groups A, B, C & D |
| Warranty | 3 years |
| Included | CX-04 monitor, alkaline batteries and alligator clip |
Specifications are subject to manufacturer updates. Refer to the RKI CX-04 Operator's Manual for complete operating, calibration, safety and maintenance requirements.
Product Literature
Operator's Manual
Need help with the RKI CX-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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