The GX-2012 Multi Gas Monitor from RKI Instruments is a powerful, compact, and adaptable gas detection tool built for professionals who demand precision, reliability, and ease of use. Whether you’re checking confined spaces, tracing gas leaks, or testing underground lines, the GX-2012 is the all-in-one solution designed to meet your safety and compliance needs.
Three Operating Modes – One Instrument
What sets the GX-2012 apart is its three dedicated operating modes, making it more than just a standard gas detector:
- Normal Operating Mode – Ideal for confined space entry and general safety monitoring.
- Leak Check Mode – Visual and audible pulse changes help identify leaks quickly and accurately.
- Bar Hole Mode – Designed for underground leak investigations with a probe and pump, especially useful for utility and gas line crews.
Methane Measurement Made Easy
With the optional Thermal Conductivity (TC) sensor, the GX-2012 can measure up to 100% volume methane, allowing it to dynamically auto-range between % LEL (Lower Explosive Limit) and % volume methane. This makes it a top choice for line purge testing and methane-specific applications.
Compact, Lightweight, and Rugged
At just 12.3 ounces, the GX-2012 is RKI’s smallest personal multi-gas monitor—making it effortless to carry on a belt or pocket during long shifts. It’s ruggedly built for harsh environments but light enough for all-day wear.
Monitors Five Key Gases:
- LEL combustibles (ppm or %)
- Oxygen (O₂)
- Carbon Monoxide (CO)
- Hydrogen Sulfide (H₂S)
- Methane (up to 100% volume with TC sensor)
Each sensor is built for accuracy, fast response, and long-term reliability, supporting a wide range of applications from hazardous material response to wastewater treatment.
User-Friendly Features
- Large LCD Display – Shows gas readings, battery level, time, and backlights automatically in alarm conditions.
- Multiple Alarms – Vibration, visual, and audible alerts for immediate awareness in high-risk situations.
- Self-Diagnostics – The GX-2012 continuously checks for sensor faults, low flow, low battery, or calibration errors.
- Tool-Free Maintenance – Battery replacement is quick and easy with no tools required.
- Interchangeable Power Options – Choose between Li-ion or alkaline battery packs for maximum flexibility.
Datalogging & Connectivity
With built-in datalogging capabilities, the GX-2012 can store hours of readings for later review and compliance:
- 10-second intervals = 10 hours of data
- 5-minute intervals = 300 hours
- 10-minute intervals = 600 hours
Included datalogging software makes it easy to download and analyze recorded data for reports or audits.
Included Accessories:
- 10” probe and 10’ hose
- Belt clip and 3.5” rubber nozzle
- Datalogging software
- Quick reference card & manual
- Training CD
GX-2012 Applications:
- Confined space entry
- Personal safety monitoring
- Leak detection and repair
- Refineries and chemical plants
- Fire departments and hazmat teams
- Wastewater treatment facilities
- Mining and underground operations
Specifications Overview:
| Gas Detected | Detection Principle |
|---|---|
| Combustible Gases (LEL) | Catalytic Combustion |
| Methane (100% Volume) | Thermal Conductivity (TC) |
| Oxygen (O₂) | Galvanic Cell |
| Hydrogen Sulfide (H₂S) | Electrochemical Cell |
| Carbon Monoxide (CO) | Electrochemical Cell |
Built for the Field
The GX-2012 is intrinsically safe, with certifications including ATEX, IECEx, CE, and CSA, ensuring it’s ready for use in the most hazardous environments worldwide.
Whether you’re a first responder, plant operator, or utility technician, the GX-2012 Multi Gas Monitor delivers the accuracy, durability, and versatility required to keep you and your team safe.
You can find this product here: https://www.gas-sensing.com/gx-2012-model.html



