The vendor’s line of SEM wireless Ethernet bridges includes three new devices that are UL-approved for deployment in Class 1, Div.
1 Groups B, C and D areas, which include such hazardous locations as oil fields, gasoline refineries and coal mines. The three products, all of which offer 10/100Base-T Ethernet connectivity are: SEM910-HL (for hazardous location), based on the SEM910 and offering 900MHz operation at 172Kbps; SEM2410-HL, based on the SEM2410, with 2.4GHz operation at 460Kbps; and SEM2411-HL, based on the SEM2411, also 2.4GHz, with transmission at 1.23Mbps. All three products feature enclosures with windows for viewing status indicators and a gas-tight connection system that allows antennas to be mounted remotely from the SEM.
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