The Mine Hunters are on the search for sapphires. In this episode they head to South Western Madagascar, to one of the few places in the world where a single mine can produce sapphires of every color of the rainbow.
After a wall collapse, oxygen depletion is the biggest danger they face in these dangerous environments – tunnels which have been sealed off for some time, are long, narrow, and go deep under ground.
Unfortunately miner Fred runs out of Oxygen whilst inspecting the first muddy pit mine. His Tetra 3 gas detector goes in to alarm, allowing his friends to pull him out quickly and safely. Although the team here is on a budget, the one piece of kit they can not go without is clear – a life saving gas detector!
Find out more about the Tetra 3 Gas Detector and other interesting applications such as Volcano research