The flame detectors are used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving. High sensitivity.

• With this type of flame supervision, the UV radiation emitted by gas or oil flames is used to generate the flame signal.

• The radiation detector consists of a UV-sensitive cell with 2 electrodes, which ignite when illuminated with radiation in the 190...270 nm range of the spectrum, thereby triggering a current in the flame detector circuit.

• The UV cell does not respond to glowing firebrick in the combustion chamber, daylight or light from the boiler room illumination.

The dust- and splashwater-proof housing of this flame detector has a fanged-on robust light metal tube with a radiation entry window for lateral viewing. A cylindrical slotted shutter rotates in the tube which interrupts the incidence of UV radiation to the UV cell mounted directly behind the radiation entry window at the rate of about 3 times per second (continuous testing of the cell’s striking and quenching performance).