Detection Type​

Ultraviolet flame detection

Detection band: 180 to 260 nm

Supply Voltage​

Common listed versions: 24 VDC, 28 VDC, or 115 VAC

Nameplate examples also list 20 to 35 VDC, 10 W max

Exact supply depends on ordered version

Output​

0 to 10 VDC analog version

SPDT relay version: 5 A at 250 VAC or 30 VDC

Version must be confirmed from nameplate

Gain​

100 to 1000 times adjustable

Frequency Response​

20 Hz to 20 kHz

Response Time​

Flame established: 0.1 s or less

Flame lost: 0.2 s or less

Operating Temperature​

Common listing: -40 to 85 °C

Some versions list -40 to 75 °C or higher intermittent ratings

Storage Temperature​

-55 to 125 °C

Humidity​

0 to 95%, non-condensing

Enclosure​

Industrial encapsulated electronics

Metal or industrial plastic housing depending on version

UV-resistant lens

IP65 listed for some versions

Certifications​

CE

TÜV

UL

CSA

ATEX or FM listed for some combustion applications

Application Scenarios​

Boilers

Gas turbines

Industrial furnaces

Petrochemical heaters

Glass furnaces

Refinery burners

Power plant burners

Incineration systems

Working Principle​

Flame UV photons strike the Geiger-Müller tube and create pulses. The amplifier counts and conditions the pulses, compares the result with the threshold, and drives the analog or relay output to indicate flame on or flame lost.

Installation Requirements​

Mount in the specified control cabinet, panel, or DIN-rail arrangement.

Orient the UV sensor or probe toward the flame observation zone.

Use shielded cable for UV detector and amplifier wiring.

Ground the shield correctly.

Confirm hazardous-area certification before installation in explosive atmospheres.

Usage Notes​

Do not expose the UV tube to direct sunlight or welding arcs during setup.

Periodically test with a certified UV source.

Balance gain to avoid false trips while maintaining sensitivity.

Replace the UV tube at end of life according to the manual.

Never bypass flame-loss interlock during operation.