Pressure transmitters which have been approved for use with intrinsically safe installations in underground mines.
DPT200 Pressurised Tank Level Differential Pressure Transmitter- DPT200 High One Side Overload Differential Pressure Sensor
For underground mines there is a separate approval process to the one for non-mining installations of intrinsically safe pressure transmitters. A major consideration for underground mines is preventing ignition of any firedamp (methane gas) which maybe present in the tunnels, chamber and workface areas. For this reason the intrinsic safety approval for mining designates Methane as the gas group.