UV-4 Flame Detector
372000-28 Rev J
2
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A six-position electrical connector mates with a corresponding connector in the base assembly to
facilitate installation or field replacement.
Forney offers UV-4 base assemblies having several different configurations. Figures 2 through 4 illustrate
the major physical variations. The primary functional differences are as follows:
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A base with a lens assembly. This configuration is used for front-mount configurations. The lens
assembly can be plain or magnifying glass and isolates the electronic components from furnace gases in
the sight tube. The flame detector is available with either pigtail wiring or a bulkhead connector that
provides the electrical interface with the external amplifier assembly.
Figure 2 Base Assembly with Bulkhead Connector
Figure 3 Base Assemblies with Pigtail Wiring
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A base with a fiber-optic light guide. This assembly includes a fiber-optic cable assembly instead of a
lens. The fiber-optic light guide frequently is used to transmit light through the wind box of a
tangentially fired furnace with tilting burners or in applications that lack the space for direct viewing. As
before, the flame detector is available with either pigtail wiring or a bulkhead connector.
