Features • Natural diffusion sampling method and high-sensitivity sensor, with high sensitivity and repeatability. • CSTN colorful LCD, large & clear. • Compact design, easy carrying. • High strength engineering plastics and compound anti-slippery rubber; high strength, water-proof, dust-proof and explosion-proof. • Applicable to gas leakage underground tunnels, mines, pipelines etc. • 100,000 records storage capacity including peak value