| 摘要 |
Portable battery-operated ambient air analyzer comprising an electrically-energized incandescent source of infra-red radiation producing a beam passing through an air sample to a sensor. The infra-red source is surrounded by an explosion-proof enclosure to prevent an explosion internally of the enclosure being propagated out to the atmosphere. The incandescent source is a self-supporting filamentary coil having no interior core or mandrel. The coil is formed of a metal composition including aluminum, chromium and iron, operated at a temperature of less than 1000 DEG C.
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