Can I safely use FCI thermal flow switches and meters in hazardous (explosive) gases ?
FCIs Thermal Technology is safe to use in near all flammable and explosive liquids and gases. Most of the products that FCI offers have independent agency approvals such as, Factory Mutual, Canadian Standards Association and CENELEC for use in hazardous locations. Typical ratings are Class I and II, Groups B, C, D, E, F, and G, Division 1 and 2, EEx d LLC T4. Group B gases includes hydrogen. In addition to using special explosion proof enclosures for these hazardous areas, the circuitry is designed so that the maximum skin temperature of the flow element never nears the ignition temperature of the gas or vapor. Verification of the maximum surface temperature, known as T-rating, as well as other requirements for safe use of the instrument in hazardous locations are carefully evaluated by the independent testing agencies before issuing their approval. Refer to FCI Tech Brief TB001 for a comprehensive discussion on understanding instrumentation T-ratings.
