Gas Data GFM436 - GFM436 General Information; Introduction to GFM436; GFM436 Features

9ENG8008 GFM436 User Manual
GFM436 General Information- 9
4 GFM436 General Information
4.1 Introduction
The Gas Data GFM436 handheld series of analysers is designed specifically for monitoring and analysing gas content
of landfill, biogas and contaminated land sites. It measures the methane, oxygen and carbon dioxide content of site
gases, gas pressure or vacuum, and gas velocity.
Operation is extremely simple, yet the readings obtained are highly accurate. The instrument uses Gas Data's
proprietary infra-red methane and carbon dioxide sensors and a combination of industry standard electrochemical
gas sensor cells. A variety of external sensors can be plugged in, e.g. vane anemometer to measure gas velocity or a
temperature probe for ambient and other temperatures.
The GFM436 series has rechargeable Nickel Metal Hydride batteries giving around eight hours use between charges.
A battery charger and mains unit is supplied with the instrument and a field replaceable battery pack is also
available as an optional extra.
4.1.1 Features
· Up to 7 gas analysis channels.
· 4 Wavelength optical infra-red analyser.
· Atmospheric pressure.
· Powerful sample pump.
· User replaceable sample filter.
· Field replaceable/rechargeable battery pack.
· Optional flow, pressure and temperature.