The KHM 20 is a compact flame detector which has been specially developed for rough industrial use in single burner systems and in particular in connection with programmable logic controllers (e.g. PLC).
The KHM 20 is a compact flame detector which has been specially developed for rough industrial use in single burner systems and in particular in connection with programmable logic controllers (e.g. PLC). The patented evaluation of the flame signal via the flicker frequency of the radiation of the coming flame. All types of flames are detected by the automatic sensitivity evaluation. No adjustments are required for commissioning or maintenance.
The KHM 20 only evaluated the flickering of the flame to be monitored, direct light radiation and constant frequencies do not lead to flame detection. Uniform light beams and any constant frequencies do not lead to a permanent flame detection. Disturbing sources of extraneous light, e.g. from fluorescent tubes or low-frequency background radiation from glowing brickwork, are suppressed. Unintentional influences on the flame detection can thus be avoided.
The adapter, which serves as the interface of the flame detector to the combustion chamber, can be adapted to specific requirements with optionally available lenses, filters and pinholes. An LED as an optical interface is a readout of relevant operating parameters, such as the occurrence of flame modulation, the current switching status, depending on the flame signal or the possible serial number.
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