Description
RKI Instruments OX‑04 Single Gas Monitor Oxygen 0–40% ATEX/IECEx
The RKI Instruments OX‑04 is a compact personal oxygen gas monitor designed for continuous monitoring of oxygen concentrations in hazardous and industrial environments. The monitor uses an electrochemical oxygen sensor, operates by diffusion sampling, and provides audible, visual and vibration alarms when oxygen levels reach configured alarm thresholds. Its rugged IP66/IP67-rated design, intrinsic safety certifications, and long operating life make it suitable for demanding workplace applications.
Key Features
- ✅ Oxygen (O₂) monitoring with display range of 0.0–40.0 vol%
- ✅ Electrochemical sensor using potentiostatic electrolysis detection technology
- ✅ Diffusion sampling for continuous personal monitoring
- ✅ Audible, visual and vibration alarm system
- ✅ Intrinsically safe design certified to ATEX and IECEx standards
- ✅ IP66/IP67 dust and water protection rating
- ✅ Powered by two AAA alkaline or Ni-MH batteries
- ✅ Approximate operating time up to 3,000 hours on AAA alkaline batteries
- ✅ Automatic alarm backlight for improved visibility
- ✅ Compact housing with rotating alligator clip
- ✅ Three-year sensor warranty from manufacturer
Benefits
- 🛡️ Helps workers identify oxygen-deficient or oxygen-enriched atmospheres quickly
- 🔋 Long battery life reduces maintenance frequency and downtime
- 📢 Multiple alarm methods improve user awareness in noisy environments
- 💧 Rugged enclosure withstands challenging industrial conditions
- 👷 Lightweight design supports comfortable daily personal wear
- ⚙️ Field-replaceable sensor design supports long-term serviceability
Specifications
| Brand | RKI Instruments / RIKEN KEIKI |
| Model | OX‑04 |
| Part Number | 72-0018 |
| Product Type | Single Gas Oxygen Monitor |
| Target Gas | Oxygen (O₂) |
| Detection Principle | Potentiostatic Electrolysis Method (Electrochemical) |
| Sampling Method | Diffusion |
| Detection Range | 0 to 25.0 vol% |
| Display Range | 0.0 to 40.0 vol% |
| Low Alarm | 18.0 vol% |
| High Alarm | 25.0 vol% |
| Over Alarm | 40.0 vol% |
| Alarm Types | Gas alarm, fault alarm, audible, visual and vibration alerts |
| Ingress Protection | IP66/IP67 |
| Power Source | 2 × AAA alkaline batteries or 2 × Ni‑MH batteries |
| Continuous Operation | Approx. 3,000 hours (AAA alkaline); approx. 2,000 hours (Ni‑MH) |
| Dimensions | Approx. 54 × 67 × 24 mm |
| Weight | Approx. 93 g |
| Operating Temperature | -40°C to +60°C |
| Operating Humidity | 0 to 95% RH (non-condensing) |
| Operating Pressure | 80 to 120 kPa |
| Included in Package | OX‑04 monitor, alkaline batteries, alligator clip |
How to Use
- Install the supplied batteries according to the manufacturer instructions.
- Power on the monitor.
- Allow the instrument to complete its startup sequence.
- Attach the unit to clothing using the alligator clip within the breathing zone.
- Monitor the displayed oxygen concentration during work activities.
- Follow site safety procedures immediately if any alarm activates.
⚠️ The OX‑04 is designed to warn of oxygen-deficient or oxygen-enriched atmospheres and should be used according to established gas detection and calibration procedures.
⭐⭐⭐⭐⭐ “Reliable oxygen monitor with excellent battery life and clear alarms.” — Michael S.
⭐⭐⭐⭐⭐ “Compact, rugged and easy to wear during long shifts.” — Andre S.
⭐⭐⭐⭐⭐ “Ideal for confined-space work where dependable oxygen monitoring is essential.” — Johan S.
FAQs
What gas does the OX‑04 detect? The OX‑04 is specifically designed to monitor oxygen (O₂).
What is the display range? The instrument displays oxygen concentrations from 0.0 to 40.0 vol%.
How does the monitor sample gas? It uses diffusion sampling, allowing ambient air to reach the sensor naturally.
What alarms are provided? The monitor provides audible, visual and vibration alarms together with fault alarms.
Is the device suitable for hazardous locations? Yes. The OX‑04 is certified for intrinsically safe operation and carries ATEX and IECEx approvals.
What batteries does it use? The monitor operates on two AAA alkaline batteries or two Ni‑MH rechargeable batteries.
Can the sensor be replaced? Yes. The oxygen sensor is field replaceable.
Is the monitor water and dust resistant? Yes. It is rated IP66/IP67.
Industries & Applications
- ⛏️ Mining
- 🛢️ Oil & Gas Operations
- 🧪 Chemical Processing
- 🚒 Fire Services
- 🚰 Water & Wastewater Treatment
- 🏭 Manufacturing Facilities
- ⚡ Utilities
- 🚪 Confined Space Entry
- 🔬 Pharmaceutical Facilities
- ☣️ Hazardous Material Response
Compliance & Certifications
- ✅ ATEX Certified
- ✅ IECEx Certified
- ✅ CE Marking
- ✅ EN 50104 Approval
- ✅ Japan Ex Approval
- ✅ China Ex Approval
- ✅ Intrinsic Safety: Ex ia IIC
Choose the RKI Instruments OX‑04 when reliable personal oxygen monitoring is critical. Its proven sensing technology, rugged environmental protection, long operating life, and internationally recognized hazardous-area approvals make it a dependable solution for professional safety programs.
