Ecoprobe + other portable gas analyzers
Requirements of a portable gas analyser
For sampling of landfill gas from the landfill surface, the connected portable landfill gas analyser should have these parameters
For sampling of landfill gas from the landfill surface, the connected portable landfill gas analyser should have these parameters
- Measurement range 100 – 500,000 ppm CH4 (or at least from 1000 ppm, which is used in purpose of selective measuring of CH4;); there are no extra requirements on instrument precision
- Air sampling pump with a performance of 4 litres per minute. Other possibility is that the pump can replaced by an accessory – a sampling pump attached to the flux-scan device
- ABuilt-in integral evaluation of methane measurement; i.e. the analyser can interpret the set of individual values measured during the analysing period of a sample as an average; this property can be replaced by the post evaluation of the sampling data
- Setting of the time during which the sampling pump flushes the sampling pipe (1 second -“pre-integration period”) and setting of the time, during which the analysis of the drawn air is undertaken (10 seconds - “integration period”); these adjustments could be replaced by a manual sampling control
- Intervals between the individual analyses of methane are preferably 0.1 second ,i.e., 100 measurement over the 10 seconds sampling interval; the number of analyses or methane value readings could be much lower, perhaps as low as 3 - 4 over the sampling interval, at the expense of the measurement’s precision.