Description
RKI Instruments GX-3R Gas Detector 4-Gas ATEX CSA
The RKI Instruments GX-3R is an ultra-compact personal 4-gas monitor designed for confined space entry and hazardous work environments. It simultaneously detects combustible gases (LEL), oxygen (O₂), hydrogen sulfide (H₂S), and carbon monoxide (CO). Weighing approximately 100 g, the GX-3R is widely recognised as one of the smallest and lightest 4-gas monitors available, allowing comfortable placement within a worker’s breathing zone for continuous personal protection.
Key Features
- ✅ Simultaneous monitoring of LEL, O₂, H₂S and CO
- ✅ ATEX and CSA approved configuration
- ✅ Compact dimensions of approximately 58 x 65 x 26 mm
- ✅ Lightweight design at approximately 100 g
- ✅ Rechargeable lithium-ion battery with up to 25 hours operation
- ✅ Audible, visual and vibration alarms
- ✅ Three user-adjustable alarm levels
- ✅ IP66/IP68 dust and water resistant enclosure
- ✅ Non-compliance indicator for overdue bump tests, calibration or alarm events
- ✅ Advanced micro-sensor technology
- ✅ Dual-filament LEL sensor design for improved resistance to silicone poisoning
- ✅ Electrochemical oxygen sensor with extended service life
- ✅ Two-button operation for simple field use
- ✅ Three-year warranty on monitor and sensors
Benefits
- 🛡️ Provides continuous personal protection against multiple atmospheric hazards.
- 👷 Comfortable all-day wear within the breathing zone.
- ⚡ Fast access to real-time gas readings and alarm conditions.
- 💧 Suitable for demanding outdoor and industrial environments.
- 🔋 Long operating time reduces charging interruptions during shifts.
- 📢 Multiple alarm methods improve hazard awareness.
- 🔧 Simplified compliance management through notification indicators.
Specifications
| Brand | RKI Instruments |
| Model | GX-3R |
| SKU | 72-RA-C |
| Product Type | Portable 4-Gas Detector |
| Gas Detection | LEL, Oxygen (O₂), Hydrogen Sulfide (H₂S), Carbon Monoxide (CO) |
| Sampling Method | Diffusion |
| Display | Digital LCD with icons |
| Battery Type | Rechargeable Lithium-Ion |
| Operating Time | Approximately 25 hours |
| Charge Time | Approximately 3 hours |
| Alarm Types | Audible, visual and vibration |
| Alarm Functions | Three alarm levels, STEL, TWA, overscale and trouble alarms |
| Operating Temperature | -20°C to +50°C continuous |
| Temporary Temperature Range | -40°C to +60°C for up to 15 minutes |
| Humidity Range | 10% to 90% RH continuous, non-condensing |
| Ingress Protection | IP66/IP68 |
| Approvals | ATEX, CSA |
| Dimensions | 58 x 65 x 26 mm |
| Weight | Approximately 100 g |
| Included Accessories | Li-Ion battery pack, charger, calibration adapter, alligator clip, rubber boot |
How to Use
- Fully charge the GX-3R before first use.
- Perform required bump testing and calibration procedures according to site requirements.
- Attach the detector within the breathing zone, typically on a collar or lapel.
- Power on using the two-button interface.
- Verify normal operation and sensor readiness.
- Monitor displayed gas readings throughout the work task.
- Immediately follow site emergency procedures if any alarm activates.
- Recharge and maintain the detector after use.
⚠️ The GX-3R is intended for personal atmospheric monitoring and should be bump tested and calibrated according to workplace safety procedures to ensure accurate gas detection.
⭐⭐⭐⭐⭐ “Extremely lightweight and easy to wear all shift. The alarms are impossible to miss.” — Michael S.
⭐⭐⭐⭐⭐ “Ideal for confined space work. Reliable readings and excellent battery life.” — David R.
⭐⭐⭐⭐⭐ “Compact, rugged and simple to operate. A great addition to our safety programme.” — Jason T.
Frequently Asked Questions
What gases does the GX-3R monitor? The detector simultaneously monitors combustible gases (LEL), oxygen, hydrogen sulfide and carbon monoxide.
Can the detector be used in confined spaces? Yes, the GX-3R is specifically designed for personal monitoring and confined-space applications.
How long does the battery last? The rechargeable lithium-ion battery provides approximately 25 hours of operation under normal conditions.
What protection rating does the enclosure have? The unit is rated IP66/IP68 for dust and water resistance.
Does the detector provide multiple alarm types? Yes, audible, visual and vibration alarms are provided for enhanced user awareness.
What is the non-compliance indicator? The detector can flash its LEDs to indicate overdue bump tests, overdue calibration or a previous gas alarm event.
Is a hydrogen-compensated CO sensor available? Yes, certain configurations are available with a hydrogen-compensated CO sensor.
What sensor technology is used? The GX-3R uses advanced micro sensors, including a dual-filament combustible gas sensor and combo CO/H₂S sensor configuration.
Industries & Applications
- ⛽ Oil & Gas Operations
- 🏭 Refineries & Petrochemical Facilities
- 🚧 Construction Sites
- 🚰 Water & Wastewater Treatment
- ⚡ Utilities
- ⛏️ Mining Operations
- 🚒 Emergency Response Services
- 🔧 Manufacturing Facilities
- 🕳️ Confined Space Entry
- 👷 Personal Worker Monitoring
Compliance & Certifications
- ✅ ATEX Approved
- ✅ CSA Approved
- ✅ IP66/IP68 Ingress Protection Rating
The RKI Instruments GX-3R delivers professional-grade atmospheric monitoring in an exceptionally compact package. Combining advanced sensor technology, long battery life, rugged construction and trusted safety approvals, it is an excellent choice for organisations seeking dependable personal gas detection for demanding industrial environments.
