Methane, Oxygen, Carbon Monoxide,Hydrogen, Sulphide Detector

G 450
  • Compact and robust 1-to-4 sensor design
  • Interchangeable battery packs for up to 25 hours of continuous oper
  • Full 3-year warranty on all sensors
  • Highly water resistant (IP 67
  • Optional motorized pump operates in diffusion or sample-draw

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Watertight design
GfG’s G450 is a compact and lightweight 4-gas detector that continuously measures CO2, H2, S2O, O2 and combustibles in ambient air. Its functional and watertight design (IP 67) incorporates an impact proof, rubberized housing to meet the toughest requirements of harsh environments.Easy operation
The G450 simplifies gas detection with three menu-driven soft touch keys. A large graphic display provides accurate readings of all sensors at a glance.Long life sensors
Factory-calibrated sensors ensure accurate readings. The extended sensor life reduces the cost of ownership. Sensors come with a three year warranty..

Operation time
Depending on the frequency and duration of alarms, the device will operate for up 25 hours. Only 4 hours are needed to fully recharge a unit equipped with the NiMH battery pack.

Perfect alarm system
An extremely loud audible alarm (103 dB at 30 cm) and bright, rotating alarm lights provide a reliable warning for gas hazards. Depending on
the severity of the alarm, the display changes color from green to orange or red. The detector’s battery status and readiness for operation
are continously monitored and displayed. Critical conditions will cause an immediate alarm. TLV, TWA and STEL values are continuously monitored.
A vibrating alarm gives an extra degree of protection in loud environments.

Sampling pump
A detachable, self-powered pump is available for sampling confined spaces prior to entry. A low flow alarm is triggered in the event of insufficient flow to the monitor caused by blocked or bent tubing

The datalogger records gas concentrations and alarms over a period of 50 hours. The data can be downloaded to a PC for viewing, storage and

Easy reading
The large, high resolution topmounted display can be flipped 180o by pressing two buttons, allowing measurements to be easily read while the
detector is being worn on a belt, pocket or lapel.

Interchangeable battery packs
Rechargeable NiMh or alkaline battery cartridges are easily interchangeable in the field, allowing the user to choose the best choice for their application. The intelligent electronics automatically recognize the type of battery pack installed, allowing the remaining power level to be displayed accurately

Technical Data
Gases / warranty
Combustible gases (CH4)
Oxygen (O2)
Carbon monoxide (CO)
Hydrogen sulfide (H2S)
COSH (dual channel CO and H2S sensor
Audible – 103 dB at 30 cm (restrictable to 95 dB)
Visual – Bright, rotating 360° LED’s, plus heterochromatic backlit display
Vibrating alarm
Detection range and resolution
CH4    0-100% LEL     0.5%
CH4     0-5% volume     0.05%
O2     0-25% volume     0.1%
CO      0-300 ppm      1 ppm
H2S      0-100 ppm      1 ppm
COSH      CO (0-300 ppm) and H2S (0-100 ppm)      1 ppm
IP 67 (dust and highly water resistantAccessories
Datalogging kit
Self powered detachable sample pump (run-time up to 25 hours
Spare battery cartridges (alkaline or rechargeable)
Rechargeable (NiMh) battery cartridge with optional LED flashlight
Expected sensor lifetime
CH4      3-5 years
O2     3 years
CO      up to 4 years
H2S      3 years
COSH      3 years
0.62 pounds (280 g)Dimensions
4.4×2.6×2 inches (66×11.8×50.8 mm) (HxWxD)
Operational time
Up to 25 hoursCharge time
4 hours with rechargeable NiMh cartridgePower source
2 “AA” batteries or
rechargeable NiMh battery cartridge

Temperature range
-4° to +122°F (-20 to 50°C) ambient
5 to 95% r.h. (non-condensing)

Rating and certifications (intrinsic safety)
Class I, Division 1, Group A, B, C, and D Hazardous locations Temp
code T3

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