Description
The Riken Keiki GX-3R is the world’s smallest and lightest 4-gas personal monitor, designed for reliable, real-time gas detection in hazardous environments. It is primarily used in confined spaces and for personal safety monitoring, capable of simultaneously detecting LEL (combustibles), O₂, H₂S, and CO.
Key Features
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- Ultra-Compact & Lightweight Design: Weighing approximately 100g (3.52 ounces) and measuring just 58mm (W) x 65mm (H) x 26mm (D), the GX-3R is small enough to be clipped within a worker’s breathing zone without interfering with work.
- Simultaneous 4-Gas Detection: It monitors and displays four critical gases:
- LEL (combustible gases, e.g., CH₄)
- O₂ (oxygen)
- H₂S (hydrogen sulfide)
- CO (carbon monoxide, with optional hydrogen compensation available)
- Advanced Micro Sensors: The monitor utilizes next-generation micro sensors with enhanced performance and a long lifespan.
- The LEL sensor has a unique dual-filament design to increase resistance to silicone poisoning.
- The electrochemical O₂ sensor has a 3 to 5 year lifespan.
- The H₂S and CO sensors are combined into a single micro sensor for a compact design.
- Durability and Environmental Resistance: The unit has an impact-resistant body with a removable protective rubber boot and is IP66/68 rated for dust and water resistance, suitable for demanding industrial and maritime applications.
- Alarms and Indicators: It features loud 95dB audible, visual (flashing lights), and vibration alarms. A non-compliance indicator flashes LED lights every 30 seconds if a bump test or calibration is overdue, or if an alarm event has occurred.
- Simple Operation and Display: The device is operated via a simple 2-button interface and features a large, auto-backlit LCD display.
- Power and Battery Life: It uses a rechargeable lithium-ion battery that provides up to 25 hours of continuous operation, with an optional long battery mode extending the runtime to approximately 40 hours.
- Data Logging: The internal data logger stores 3,600 event logs and 300 hours of trend data, which can be read out using an IrDA link.
- Approvals: The GX-3R carries numerous approvals, including ATEX, IECEx, and MED (Marine Equipment Directive), making it suitable for a wide range of global industrial applications.




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