GX-Force Portable 4 Gas Monitor | RKI

GX-Force Portable 4 Gas Monitor

Portable 4 Gas Detector


  • 2 Operating modes
    — Normal and Leak Check
  • Internal sample pump with 100′ sample range
  • 30 hours of operation (Lithium-ion battery)
  • Easy to grip lightweight design
    — 2.5″ W x 6.81″ H x 1.85″ D, 9.87 ounces
  • Water and dust resistant design, IP67
  • Field replaceable sensors & filters
  • Impact resistant body
  • Intrinsically safe
  • Large LCD Auto-backlit display
  • 3 Year warranty
Contact Sales


With the GX-Force, you have multiple tools in one instrument. Having 2 operating modes, the GX-Force can be used for confined space, safety monitoring in its Normal Operating mode. A Leak Check mode is the solution for all leak investigations.

The GX-Force is RKI’s smallest personal 1-4 gas monitor with a strong built-in sample pump capable of a 100’ sampling range. Weighing only 9.8 ounces, the GX-Force can monitor the standard confined space gases (LEL combustibles, Oxygen content, Carbon Monoxide, and Hydrogen Sulfide).  Built around high-quality micro-sensor technology, which are compatible with the GX-3R, GX-3R Pro, 04 Series, and Gaswatch 3 instruments.

The GX-Force’s large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm conditions. Standard alarm types include vibration, visual, and audible alarms, which can be set to latching or non-latching. Controlled by a microprocessor, the GX-Force continuously checks itself for sensor connections, low battery, circuit trouble, low flow, and calibration errors. The GX-Force operates 30 hours on a Li-ion battery.

Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically or individually in single calibration mode. Calibration can be done individually or in a group.


  • Personal monitoring
  • Confined spaces
  • Refineries/petrochemical
  • Utilities
  • Oil and Gas
  • Water/wastewater
  • Fire services
  • Construction


Model GX-Force
Sampling Method Suction type
Suction Flow Rate Minimum 0.35 L/min (open flow rate)
Gas Alarm Pattern Lamp flashing, continuous modulating buzzer sounding, gas concentration display flashing, vibration
Gas Alarm Reset Operation Self-resetting
Fault Alarm/Self-Diagnosis System, clock, or sensor abnormality; battery voltage drop; calibration failure;
pump abnormality; low flow rate
Fault Alarm Pattern Lamp flashing, intermittent buzzer sounding, detail display
Fault alarm reset operation Self-resetting
Display LCD digital (7-segment + 14-segment + icons) with backlight
Individual Operations Operational status, clock, battery level, peak reading, pump status, calibration notification
Sound Pressure Approx. 90 dB (30 cm)
Data Logger Function Maximum storage capacity: 3,600 items Interval: 5 minutes (adjustable)
Communication Specifications USB, 2.0 (for data logger) Connector: Type-C
Power Source Rechargeable lithium ion battery
Continuous Operating Time *1 Approx. 30 hours (25 °C, fully charged, no alarm, no backlight)
Operating Ambient
Temperature /Humidity Range *2
-20 °C – +50 °C (no sudden changes), 0 – 95 %RH (no condensation)
Approvals Intrinsically safe construction

IECEx (Ex da ia IIC T4 Ga/Ex ia IIC T4 Ga)

ATEX (II1G Ex da ia IIC T4 Ga/II1G Ex ia IIC T4 Ga)

Certifications ATEX / IECEx, QPS (under application)
Protection Level IP67 equivalent
External Dimensions / Weight Approx. 2.52 (W) × 6.81 (H) × 1.85 (D) (excluding protrusions) / Approx. 9.87 oz.

*1 Varies depending on sensor type installed. Please contact RKI for more information.

*2 The range of operating temperatures in which explosion-proof performance maintained is as follows: Temperature: -20 °C – +60 °C (no sudden changes)

Detection target gas Combustible gas

(CH4 or HC)



Carbon monoxide


Hydrogen sulfide


Detection principle New ceramic type
(catalytic type)
Electrochemical type
Detection range 0 – 100 %LEL 0.0 – 40.0 vol% 0 – 2,000 ppm 0.0 – 200.0 ppm
Resolution 1 %LEL 0.1 vol% 1 ppm 0.1 ppm
Alarm setpoints

(User-defined setting)

1st alarm: 10 %LEL

2nd alarm: 25 %LEL

3rd alarm: 50 %LEL

OVER alarm: 100 %LEL

L alarm: 19.5 vol%

LL alarm: 18.0 vol%

H alarm: 23.5 vol%

OVER alarm: 40.0 vol%

1st alarm: 25 ppm

2nd alarm: 50 ppm

3rd alarm: 200 ppm

TWA alarm: 25 ppm

STEL alarm: 200 ppm

OVER alarm: 2,000 ppm

1st alarm: 5.0 ppm

2nd alarm: 30.0 ppm

3rd alarm: 100.0 ppm

TWA alarm: 1.0 ppm

STEL alarm: 5.0 ppm

OVER alarm: 200.0 ppm

Response time (T90) CH4: Within 30 seconds,

HC: Within 40 seconds

Within 20 seconds Within 30 seconds Within 30 seconds


Coming Soon


Coming Soon


GX-Force Software

Coming Soon

Manuals & Literature

GX-Force Datasheet GX-Force Manual
Contact Image

Contact Us

Best Selling

You Might Also Like

© 2023 Gas Detectors | Portable Gas Monitors | Gas Sensors by RKI Instruments. All Rights Reserved.