G4 Multi Gas Monitor

G4 Multi Gas Monitor
G4 Multi Gas Monitor

G4 Multi Gas Monitor

Highly accurate and simple to operate

The G4 is the industry's toughest and most reliable multi gas monitor. It is capable of monitoring and displaying concentrations for up to 4 gases at a time on its large and bright display. A loud alarm, flashing LEDs, and haptic feedback alert the user to low and high alarms with configurable settings. Calibration is simple and accurate, even more so with the available automatic G4 Calibration Station.  Combined with an incredible 24 hour run time, the G4 keeps you operating longer and more efficiently than ever before.
Large, Bright Display
The G4 has one of the largest displays in the industry at 2.25".  The bright green display backlight ensures visibility in any envorinment.

Unmatched Durability
The G4 was built for the harshest environments, so you can be sure that it will hold up to whatever you throw at it.

Simple Operation
Forget complicated menus and manuals, the familiar interface and intuitive navigation make using the G4 easy right out of the box, and one of the things our customers love most about the G4.

Minimal Maintenance Required
Aside from routine sensor replacement, no other maintenance is necessary.

Sensor Replacement

Unlike any other handheld detector, the G4 makes sensor replacement easy. Just remove a single screw to open the sensor bay, and from there the sensors are plug and play. No longer do you have complicated steps of dismantling the unit and exposing sensitive electronics.

All-Day Run Time
The G4 has an industry-leading 25 hour run time, reducing the charging requirements and allowing for multiple shift use if necessary.

Made in the USA
Designed and manufactured at our facility in Export, PA

  • MSHA: 22-A110001-0
  • The G4 accepts 1–4 Sensors:
    •  Oxygen (O2)
    • Combustible (CH4)
    • Toxic 1*
    • Toxic 2*
*Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Nitric Oxide (NO), or Nitrogen Dioxide (NO2)

  • 2.25" LCD with green LED backlight
  • Rubberized, anti-static, and shock absorbing overmold
Ingress Protection
  • Tested to IP 65
Battery Type
  • Lithium-ion
Size and Weight
  • H x W x D: 6.3 x 3.1 x 1.9 inches (without belt clip)
  • Weight: 16.2 oz (with belt clip)
Environmental Conditions
  • Operating Temperature: -20°C – 50°C
  • Charging Temperature: 0°C – 30°C
  • Relative Humidity: 15% RH – 90% RH (continuous, non-condensing)
  • Barometric Pressure: 800 – 1200 hPa
Battery Run Time
  • Up to 25 hours
Battery Charge Time
  • < 6 hours
Sensor Life
  • 24 months minimum
  • Visual – Dual LED
  • Audible
  • Vibrating
Sensor Specifications
  • Oxygen (O2)
    • Type: Electrochemical
    • Measuring Range: 0 - 25%
    • Resolution: 0.1%
    • t90 Response Time: 20 seconds (typical)
  • Methane (CH4)
    • Type: Catalytic
    • Measuring Range: 0 - 5%
    • Resolution: 0.1%
    • t90 Response Time: 20 seconds (typical)
  • Carbon Monoxide (CO)
    • Type: Electrochemical
    • Measuring Range: 0 - 1000 PPM
    • Resolution: 1 PPM
    • t90 Response Time: 25 seconds (typical)
  • Hydrogen Sulfide (H2S)
    • Type: Electrochemical
    • Measuring Range: 0 - 100 PPM
    • Resolution: 1 PPM
    • t90 Response Time: 55 seconds (typical)
  • Nitric Oxide (NO)
    • Type: Electrochemical
    • Measuring Range: 0 - 200 PPM
    • Resolution: 1 PPM
    • t90 Response Time: 25 seconds (typical)
  • Nitrogen Dioxide (NO2)
    • Type: Electrochemical
    • Measuring Range: 0 - 20 PPM
    • Resolution: 0.1 PPM
    • t90 Response Time: 40 seconds (typical)

Product Manuals

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Product Brochures

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Product Ordering Guides

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FYI Letters

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G4 Multi Gas Monitor
  • G4, 3-Gas (CH4/ O2/ CO):  2172610001112
  • G4, 4-Gas, (CH4/ O2/ CO/ H2S): 2172610001111
  • G4, 4-Gas, (CH4/ O2/ CO/ NO2): 2172610001113
  • G4, 4-Gas, (CH4/ O2/ NO/ NO2): 2172610001114
  • G4, 1-Gas, (CH4) with 20-minute backlight: 2172610001115
  • G4, 2-Gas, (CH4/ O2): 2172610001116
Accessory Kit
  • With Accessory Kit (Charger, Cal Cap, Tubing, Clip and Manual):  2172615551211
  • Without Accessory Kit (Unit and Manual only): 2172615551222
  • Methane (CH4): 5257200001002
  • Oxygen (O2): 5257000302
  • Carbon Monoxide (CO): 5257000101011
  • Hydrogen Sulfide (H2S): 5257000201011
  • Nitrogen Dioxide (NO2): 5257000801011
  • Nitric Oxide (NO): 5257000901011
  • Null Sensor (Toxic/O2): 5257110014001
  • Single Unit Charger: 2172615551126
  • 6-Unit Charger: 2172650030001
  • Sensor Cover (Gasket, Screw, and Washer): 2172615551116
  • Belt Clip: 2172615551117
  • Carrying Case: 2172615551119
Calibration Station
  • Calibration Station: 2142020000040
  • Demand Regulator: 2142020000061

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