GX-2012 Multi Gas Monitor: Versatile Safety Monitoring in the Palm of Your Hand

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 DetectedDetection 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

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