Gas Detectors for Mine Applications

U.K. based Trolex, which specializes in safety monitoring equipment, notes that its STX3241 and STX3261 toxic and flammable gas detectors and TX5920 Vortex air flow sensors have been used to monitor CH4, CO and air flow at the Svea Nord mine in Norway. The sensors have a high-strength molded housing sealed against dust and moisture to IP65 standard and EMC protection, making the systems reliable in the extreme, arduous conditions in the mine. All the sensors have ATEX M1 approval. The STX3261 is a robust, dust and waterproof pre-calibrated gas detector which utilizes a poison-resistant catalytic combustion sensor to monitor flammable gases present in the atmosphere such as methane and propane. The large mass of the sensing element assures a long and reliable operating life with exceptional stability even in conditions of high vibration. The sensor has a life expectancy of approximately five years depending on the monitoring conditions and can be rapidly serviced or replaced at the end of its operating life. It is also available with a remote mounted gas-sensing module for installations where space or access is restricted. The STX3241 toxic gas sensor provides economical safety protection from toxic gases such as carbon monoxide, hydrogen sulphide, nitrogen dioxide, nitric oxide and sulphur dioxide in mining and tunneling applications. The sensor features high accuracy electrochemical cell gas sensing elements, convenient and secure zero and span calibration and a choice of output signals of 4–20 mA or 0.4–2V.

As featured in Womp 2010 Vol 04 -