The latest fixed biogas analyser from Geotech, the GA3000 PLUS, can now optionally monitor up to three sample points and hydrogen sulphide (H2S) levels at 0-50 and 0-10,000ppm. For AD and landfill, H2S measurement pre- and post-treatment shows the effectiveness of H2S removal and maintaining H2S below acceptable CHP thresholds and compliance with CHP manufacturer warranty contracts. Vital for CHP restart and protection against sudden gas level changes, the GA3000 PLUS fixed biogas analyser can pay back in weeks or even days.